CN113281156A - Material high-strain creep-fatigue coupling test method under low-temperature corrosion environment - Google Patents
Material high-strain creep-fatigue coupling test method under low-temperature corrosion environment Download PDFInfo
- Publication number
- CN113281156A CN113281156A CN202110687188.1A CN202110687188A CN113281156A CN 113281156 A CN113281156 A CN 113281156A CN 202110687188 A CN202110687188 A CN 202110687188A CN 113281156 A CN113281156 A CN 113281156A
- Authority
- CN
- China
- Prior art keywords
- shaped
- box
- corrosion
- fatigue
- metal sample
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005260 corrosion Methods 0.000 title claims abstract description 103
- 230000007797 corrosion Effects 0.000 title claims abstract description 103
- 230000008878 coupling Effects 0.000 title claims abstract description 33
- 238000010168 coupling process Methods 0.000 title claims abstract description 33
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 33
- 239000000463 material Substances 0.000 title claims abstract description 25
- 238000010998 test method Methods 0.000 title claims abstract description 16
- 238000012360 testing method Methods 0.000 claims abstract description 79
- 229910052751 metal Inorganic materials 0.000 claims abstract description 47
- 239000002184 metal Substances 0.000 claims abstract description 47
- 239000007788 liquid Substances 0.000 claims abstract description 35
- 238000009661 fatigue test Methods 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims description 14
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- 238000005530 etching Methods 0.000 claims description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 11
- 238000005259 measurement Methods 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0071—Creep
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0228—Low temperature; Cooling means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0236—Other environments
- G01N2203/024—Corrosive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention discloses a material high-strain creep-fatigue coupling test method under a low-temperature corrosion environment, which is used for testing by means of a test device, wherein the test device comprises a fatigue test machine, a low-temperature instrument, a video extensometer, a corrosion solution container, a submersible pump arranged in the corrosion solution container, a multilayer spiral pipe, a box-shaped corrosion tank and upper and lower clamping rods; the space in the box-shaped corrosion tank is divided into a cuboid chamber and a U-shaped chamber through a U-shaped overflow plate, a through hole and a liquid inlet hole for a metal sample to pass through are formed in the bottom wall of the cuboid chamber, a liquid outlet hole capable of being connected with a guide pipe of a corrosion solution container is formed in the bottom wall of the U-shaped chamber, and a plurality of layers of spiral pipes in the low-temperature instrument are respectively connected with the liquid inlet hole and the submersible pump; and (4) finishing the assembly of the testing device and tightly connecting the metal sample in the box-shaped corrosion tank to carry out the test. The test method meets the test requirement of a high-strain fatigue creep test in a low-temperature corrosion environment, and can realize corrosion fatigue creep tests at different temperatures.
Description
Technical Field
The invention relates to the technical field of material high-strain creep-fatigue coupling tests, in particular to a material high-strain creep-fatigue coupling test method in a low-temperature corrosion environment.
Background
Creep test and fatigue test are important methods for evaluating the safety of materials, and in order to evaluate the service performance of structural materials in a deep-sea complex environment, the high-strain fatigue and creep performance of the materials in a low-temperature corrosion environment need to be tested. At present, few researches related to fatigue creep coupling loading in a low-temperature corrosion environment are carried out at home and abroad, and related professional test equipment is not found. The following difficulties exist in carrying out fatigue creep coupled loading in low temperature corrosive environments: the low-temperature long-time test is generally realized by a low-temperature environment box, but the cavity of the environment box is large, and the test needs a long connecting rod, so that the stability of the fatigue test is not facilitated; the environment box is a closed environment, so that the volatilization level of the solution and the supplement of the solution are difficult to effectively observe, and the instability of temperature and a corrosive environment is easily caused; the conventional contact extensometer can be corroded by the extensometer itself in a corrosive environment, electrochemical corrosion is easily caused by a contact point, and the deformation of the strain gauge exceeds the elastic limit of the strain gauge under the high-strain measurement condition by using the strain gauge, so that the test requirement of high-strain fatigue cannot be met.
Therefore, in order to overcome the above problems, it is necessary to develop a test method for fatigue creep combined loading in a low-temperature corrosion environment.
Disclosure of Invention
In order to realize the evaluation of the service performance of the structural material under the deep sea complex working condition, the GB/T20120.1-2006 part 1 of the corrosion fatigue test of metals and alloys: based on the standards of the cyclic failure test and GB/T2039-.
In order to achieve the purpose, the invention adopts the specific scheme that:
the high strain creep-fatigue coupling test method of the material under the low temperature corrosion environment is used for testing by means of a high strain creep-fatigue coupling test device, wherein the high strain creep-fatigue coupling test device comprises a fatigue testing machine, a low temperature instrument, a video extensometer, a submersible pump, a corrosion solution container, a multilayer spiral pipe, a box-shaped corrosion tank and a pair of upper and lower clamping rods which can be oppositely arranged and clamped on the fatigue testing machine;
cylindrical grooves which can be matched with the metal sample are arranged on the upper clamping rod and the lower clamping rod;
the front wall of the box-shaped corrosion tank adopts a test board which can be matched with a video extensometer for use, a U-shaped overflow board fixedly connected with the test board is arranged in the box-shaped corrosion tank, two parallel surfaces of the U-shaped overflow board are parallel to the left side wall and the right side wall of the box-shaped corrosion tank, the bottom surface of the U-shaped overflow board is parallel to the rear wall of the box-shaped corrosion tank, the U-shaped overflow board divides the space in the box-shaped corrosion tank into a cuboid chamber and a U-shaped chamber, a through hole for a metal sample to pass through is arranged on the bottom wall of the cuboid chamber, and the metal sample can be tightly connected with the box-shaped corrosion tank through a rubber plug and a locking flange; the bottom wall of the cuboid chamber is also provided with a liquid inlet hole, the bottom wall of the U-shaped chamber is provided with a liquid outlet hole, the liquid inlet hole is connected with a multilayer spiral pipe in the low temperature instrument through a guide pipe, one end of the multilayer spiral pipe, which is far away from the liquid inlet hole, is connected with a submersible pump arranged in a corrosive solution container through a guide pipe, and the liquid outlet hole is connected with the corrosive solution container through a guide pipe;
the high strain creep-fatigue coupling test method for the material mainly comprises the following steps:
(1) designing a dumbbell-shaped metal sample with two thick ends and a thin middle part according to the standard in GB/T20120.1-2006, wherein the metal sample comprises a working section and upper and lower clamping sections arranged at two ends of the working section, full threads are uniformly distributed on the upper and lower clamping sections, and a rubber plug is arranged on the lower clamping section of the metal sample and the upper end surface of the rubber plug is ensured to be flush with the upper end surface of the lower clamping section;
(2) placing the metal sample provided with the rubber plug into the through hole, ensuring that the upper end surface of the rubber plug is flush with the upper surface of the bottom wall of the box-shaped corrosion tank, and then locking the metal sample and the box-shaped corrosion tank by using a locking flange to ensure that the metal sample and the box-shaped corrosion tank are tightly connected;
(3) respectively connecting the upper clamping section and the lower clamping section of the metal sample with the upper clamping rod and the lower clamping rod in a threaded manner, and locking the upper clamping section of the metal sample with the upper clamping rod by using a locking bolt;
(4) connecting two ends of the multilayer spiral pipe with a liquid inlet hole and a submersible pump through guide pipes respectively, and connecting a liquid outlet hole with a corrosive solution container through a guide pipe;
(5) the upper clamping rod and the lower clamping rod are respectively clamped on a fatigue testing machine, the temperature of the low-temperature instrument is adjusted to enable the corrosion solution in the box-shaped corrosion tank to reach the testing temperature and keep constant, and the real-time strain of the metal sample in the whole testing process can be recorded through the cooperation of the video extensometer and the testing plate; and (4) synchronously starting the fatigue testing machine, the video extensometer, the low temperature instrument and the submersible pump to perform the test.
Further, the high-strain creep-fatigue coupling test device also comprises a digital display thermometer for monitoring the temperature in the box-shaped corrosion tank.
Further, the rubber plug is a conical rubber plug.
Furthermore, a horizontal flow sheet is arranged at the liquid inlet of the box-shaped corrosion groove to ensure that the corrosion solution stably flows into the box-shaped corrosion groove.
Furthermore, the box-shaped corrosion groove is made of acrylic materials.
Further, the etching solution is a 3.5% NaCl solution.
Further, the diameter of the middle thin working section in the metal sample is 5 mm; the diameter of the clamping section with thicker two ends is 20 mm.
It should be noted that the loading force of the testing machine acts on the lower clamping section of the metal sample, and the locking bolt locks the upper clamping rod and the upper clamping section of the metal sample, so that the torque effect generated in the fatigue test process can be eliminated. The test principle of the test method is as follows: corrosive solution is by the immersible pump suction, then gets into the multilayer spiral pipe of arranging in the cryoscope (through the area of multilayer spiral pipe increase corrosive solution and cryoscope medium and low temperature medium, reach rapid cooling's purpose), can adjust test temperature through the cryoscope, in corrosive solution flows into box-like corrosion tank from multilayer spiral pipe through the feed liquor hole on the box-like corrosion tank bottom wall, upwards overflow that can be gentle through advection piece corrosive solution, then in the corrosive solution container is refluxed to the corrosive solution. The circulation of the corrosion solution can ensure the temperature of the corrosion solution in the box-shaped corrosion tank; the video extensometer is matched with the test board to measure the real-time strain of the metal sample.
Has the advantages that:
the testing method is carried out by means of the high-strain creep-fatigue coupling testing device, the high-strain creep-fatigue coupling testing device completely meets the testing requirements of the high-strain creep test in the low-temperature corrosion environment, and the corrosion fatigue creep test at different temperatures can be realized. The test method has the advantages of simple steps, easiness in operation, good centering performance and stable and reliable test results.
Drawings
FIG. 1 is a schematic structural diagram of a high strain creep-fatigue coupling test apparatus according to the present invention.
Fig. 2 is an enlarged view of fig. I.
Fig. 3 is one of the cross-sectional views of fig. 2.
Fig. 4 is a second cross-sectional view of fig. 2.
FIG. 5 is a graph of the high strain creep-fatigue coupling test obtained in example 1 of the present invention.
Graphic notation: 1. go up the supporting rod, 2, locking bolt, 3, metal specimen, 4, survey test panel, 5, U type overflow board, 6, rubber stopper, 7, locking flange, 8, advection piece, 9, feed liquor hole, 10, go out the liquid hole, 11, lower supporting rod, 12, fatigue testing machine, 13, video extensometer, 14, multilayer spiral pipe, 15, cryometer, 16, digital display thermometer, 17, corrosive solution container.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to specific embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, belong to the scope of the present invention.
A high-strain creep-fatigue coupling test method of a material under a low-temperature corrosion environment is used for testing by means of a high-strain creep-fatigue coupling test device, please refer to fig. 1-4, wherein the high-strain creep-fatigue coupling test device comprises a fatigue testing machine 12, a low temperature instrument 15, a video extensometer 13, a submersible pump, a corrosion solution container 17, a multi-layer spiral pipe 14, a box-shaped corrosion tank and a pair of upper and lower clamping rods which can be oppositely arranged and clamped on the fatigue testing machine 12;
cylindrical grooves which can be matched with the metal sample 3 are arranged on the upper clamping rod 1 and the lower clamping rod 11;
the front wall of the box-shaped corrosion groove is provided with a test board 4 which can be matched with a video extensometer 13 for use, the box-shaped corrosion groove is internally provided with a U-shaped overflow board 5 which is fixedly connected with the test board 4, two parallel surfaces of the U-shaped overflow board 5 are parallel to the left side wall and the right side wall of the box-shaped corrosion groove, the bottom surface of the U-shaped overflow board is parallel to the rear wall of the box-shaped corrosion groove, the U-shaped overflow board 5 divides the space in the box-shaped corrosion groove into a cuboid chamber and a U-shaped chamber, the bottom wall of the cuboid chamber is provided with a through hole for a metal sample 3 to pass through, and the metal sample 3 can be tightly connected with the box-shaped corrosion groove through a rubber plug 6 and a locking flange 7; the bottom wall of the cuboid chamber is also provided with a liquid inlet hole 9, the bottom wall of the U-shaped chamber is provided with a liquid outlet hole 10, the liquid inlet hole 9 is connected with a multilayer spiral pipe 14 in a low temperature instrument 15 through a guide pipe, one end of the multilayer spiral pipe 14 far away from the liquid inlet hole 9 is connected with a submersible pump arranged in a corrosive solution container 17 through a guide pipe, and the liquid outlet hole 10 is connected with the corrosive solution container 17 through a guide pipe;
the high strain creep-fatigue coupling test method for the material mainly comprises the following steps:
(1) designing a dumbbell-shaped metal sample 3 with two thick ends and a thin middle part according to the standard in GB/T20120.1-2006, wherein the metal sample 3 comprises a working section and upper and lower clamping sections arranged at two ends of the working section, and the diameter of the working section with the thin middle part is 5 mm; the diameter of the clamping section with thicker two ends is 20mm, full threads are uniformly distributed on the upper clamping section and the lower clamping section, the rubber plug 6 is arranged on the lower clamping section of the metal sample 3, and the upper end face of the rubber plug 6 is ensured to be flush with the upper end face of the lower clamping section;
(2) placing the metal sample 3 provided with the rubber plug 6 in the through hole, ensuring that the upper end surface of the rubber plug 6 is flush with the upper surface of the bottom wall of the box-shaped corrosion tank, and then locking the metal sample 3 and the box-shaped corrosion tank by using a locking flange to ensure that the metal sample and the box-shaped corrosion tank are tightly connected;
(3) respectively connecting the upper clamping section and the lower clamping section of the metal sample 3 with the upper clamping rod and the lower clamping rod in a threaded manner, and locking the upper clamping section of the metal sample 3 with the upper clamping rod 1 by using a locking bolt 2;
(4) two ends of the multilayer spiral pipe 14 are respectively connected with the liquid inlet hole 9 and the submersible pump through guide pipes, and the liquid outlet hole 10 is connected with the corrosive solution container 17 through the guide pipes;
(5) the upper clamping rod 1 and the lower clamping rod 11 are respectively clamped on a fatigue testing machine 12, the temperature of a low-temperature instrument 15 is adjusted to enable the corrosion solution in the box-shaped corrosion tank to reach the testing temperature and keep constant, and the real-time strain of the metal sample 3 in the whole testing process can be recorded through the cooperation of a video extensometer 13 and a testing board 4; and (4) synchronously starting the fatigue testing machine 12, the video extensometer 13, the low-temperature instrument 15 and the submersible pump to perform the test.
In detail, the high strain creep-fatigue coupling test device further comprises a digital display thermometer 16 for monitoring the temperature in the box-shaped corrosion tank.
Wherein, the rubber plug 6 is a cone-shaped rubber plug.
It should be noted that the liquid inlet of the box-shaped corrosion tank is provided with a horizontal flow sheet to ensure that the corrosion solution flows into the box-shaped corrosion tank stably.
Preferably, the box-shaped corrosion tank is made of an acrylic material.
Example 1
The high-strain creep-fatigue coupling test device comprises a fatigue testing machine 12, a low temperature instrument 15, a video extensometer 13, a submersible pump, a corrosion solution container 17, a multilayer spiral pipe 14, a box-shaped corrosion tank and a pair of upper and lower clamping rods which can be oppositely arranged and clamped on the fatigue testing machine 12;
cylindrical grooves which can be matched with the metal sample 3 are arranged on the upper clamping rod 1 and the lower clamping rod 11;
the front wall of the box-shaped corrosion groove is provided with a test board 4 which can be matched with a video extensometer 13 for use, the box-shaped corrosion groove is internally provided with a U-shaped overflow board 5 which is fixedly connected with the test board 4, two parallel surfaces of the U-shaped overflow board 5 are parallel to the left side wall and the right side wall of the box-shaped corrosion groove, the bottom surface of the U-shaped overflow board is parallel to the rear wall of the box-shaped corrosion groove, the U-shaped overflow board 5 divides the space in the box-shaped corrosion groove into a cuboid chamber and a U-shaped chamber, the bottom wall of the cuboid chamber is provided with a through hole for a titanium alloy sample to pass through, and the titanium alloy sample can be tightly connected with the box-shaped corrosion groove through a rubber plug 6 and a locking flange 7; the bottom wall of the cuboid chamber is also provided with a liquid inlet hole 9, the bottom wall of the U-shaped chamber is provided with a liquid outlet hole 10, the liquid inlet hole 9 is connected with a multilayer spiral pipe 14 in a low temperature instrument 15 through a guide pipe, one end of the multilayer spiral pipe 14 far away from the liquid inlet hole 9 is connected with a submersible pump arranged in a corrosive solution container 17 through a guide pipe, and the liquid outlet hole 10 is connected with the corrosive solution container 17 through a guide pipe; the corrosion solution contained in the corrosion solution container is 3.5% NaCl solution;
the high strain creep-fatigue coupling test method for the material mainly comprises the following steps:
(1) designing a dumbbell-shaped titanium alloy sample with two thick ends and a thin middle part, wherein the titanium alloy sample comprises a working section and upper and lower clamping sections arranged at two ends of the working section, the length of the working section with the thin middle part is 40mm, and the diameter of the working section with the thin middle part is 5 mm; the diameter of an upper clamping section and a lower clamping section which are thicker at two ends is 20mm, the length of the upper clamping section is 20mm, the length of the lower clamping section is 40mm, full threads are uniformly distributed on the upper clamping section and the lower clamping section, the rubber plug 6 is arranged on the lower clamping section of the titanium alloy sample, and the upper end face of the rubber plug 6 is ensured to be flush with the upper end face of the lower clamping section;
(2) placing the titanium alloy sample provided with the rubber plug 6 in the through hole, ensuring that the upper end surface of the rubber plug 6 is flush with the upper surface of the bottom wall of the box-shaped corrosion tank, and then locking the titanium alloy sample and the box-shaped corrosion tank by using a locking flange to ensure that the titanium alloy sample and the box-shaped corrosion tank are tightly connected;
(3) respectively connecting the upper clamping section and the lower clamping section of the titanium alloy sample with the upper clamping rod and the lower clamping rod in a threaded manner, and locking the upper clamping section of the metal sample 3 with the upper clamping rod 1 by using a locking bolt 2;
(4) two ends of the multilayer spiral pipe 14 are respectively connected with the liquid inlet hole 9 and the submersible pump through guide pipes, and the liquid outlet hole 10 is connected with the corrosive solution container 17 through the guide pipes;
(5) the upper clamping rod 1 and the lower clamping rod 11 are respectively clamped on a fatigue testing machine 12, the temperature of a low-temperature instrument 15 is adjusted to enable the corrosion solution in the box-shaped corrosion tank to reach a testing temperature (4 ℃) and keep constant, and real-time strain of a titanium alloy sample in the whole experiment process can be recorded through the cooperation of a video extensometer 13 and a testing plate 4; the test can be carried out by synchronously starting the fatigue testing machine 12, the video extensometer 13, the cryometer 15 and the submersible pump, the test is a cycle of pull loading, load maintaining and unloading, and fig. 5 is a fatigue creep coupling loading test result curve of the titanium alloy sample by using the test method:
as can be seen from FIG. 5, the low-temperature corrosion fatigue creep test is satisfactorily completed by the test method, the test system can stably run for a long time, the concentration and the temperature of the corrosion solution are constant in the whole test process, the strain measurement is continuous, and an ideal test curve can be obtained. The test curve and the fracture of the test sample accord with the failure characteristic of the creep fatigue test.
The foregoing is merely a preferred embodiment of the invention and is not to be construed as limiting the invention in any way. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (7)
1. The method for testing the high-strain creep-fatigue coupling of the material in the low-temperature corrosion environment is characterized by comprising the following steps of: the high-strain creep-fatigue coupling test device is used for testing, and comprises a fatigue testing machine, a low temperature instrument, a video extensometer, a submersible pump, a corrosion solution container, a multilayer spiral pipe, a box-shaped corrosion tank and a pair of upper and lower clamping rods which can be oppositely arranged and clamped on the fatigue testing machine;
cylindrical grooves which can be matched with the metal sample are arranged on the upper clamping rod and the lower clamping rod;
the front wall of the box-shaped corrosion tank adopts a test board which can be matched with a video extensometer for use, a U-shaped overflow board fixedly connected with the test board is arranged in the box-shaped corrosion tank, two parallel surfaces of the U-shaped overflow board are parallel to the left side wall and the right side wall of the box-shaped corrosion tank, the bottom surface of the U-shaped overflow board is parallel to the rear wall of the box-shaped corrosion tank, the U-shaped overflow board divides the space in the box-shaped corrosion tank into a cuboid chamber and a U-shaped chamber, a through hole for a metal sample to pass through is arranged on the bottom wall of the cuboid chamber, and the metal sample can be tightly connected with the box-shaped corrosion tank through a rubber plug and a locking flange; the bottom wall of the cuboid chamber is also provided with a liquid inlet hole, the bottom wall of the U-shaped chamber is provided with a liquid outlet hole, the liquid inlet hole is connected with a multilayer spiral pipe in the low temperature instrument through a guide pipe, one end of the multilayer spiral pipe, which is far away from the liquid inlet hole, is connected with a submersible pump arranged in a corrosive solution container through a guide pipe, and the liquid outlet hole is connected with the corrosive solution container through a guide pipe;
the high strain creep-fatigue coupling test method for the material mainly comprises the following steps:
(1) designing a dumbbell-shaped metal sample with two thick ends and a thin middle part according to the standard in GB/T20120.1-2006, wherein the metal sample comprises a working section and upper and lower clamping sections arranged at two ends of the working section, full threads are uniformly distributed on the upper and lower clamping sections, and a rubber plug is arranged on the lower clamping section of the metal sample and the upper end surface of the rubber plug is ensured to be flush with the upper end surface of the lower clamping section;
(2) placing the metal sample provided with the rubber plug into the through hole, ensuring that the upper end surface of the rubber plug is flush with the upper surface of the bottom wall of the box-shaped corrosion tank, and then locking the metal sample and the box-shaped corrosion tank by using a locking flange to ensure that the metal sample and the box-shaped corrosion tank are tightly connected;
(3) respectively connecting the upper clamping section and the lower clamping section of the metal sample with the upper clamping rod and the lower clamping rod in a threaded manner, and locking the upper clamping section of the metal sample with the upper clamping rod by using a locking bolt;
(4) connecting two ends of the multilayer spiral pipe with a liquid inlet hole and a submersible pump through guide pipes respectively, and connecting a liquid outlet hole with a corrosive solution container through a guide pipe;
(5) the upper clamping rod and the lower clamping rod are respectively clamped on a fatigue testing machine, the temperature of the low-temperature instrument is adjusted to enable the corrosion solution in the box-shaped corrosion tank to reach the testing temperature and keep constant, and the real-time strain of the metal sample in the whole testing process can be recorded through the cooperation of the video extensometer and the testing plate; and (4) synchronously starting the fatigue testing machine, the video extensometer, the low temperature instrument and the submersible pump to perform the test.
2. The method for testing high-strain creep-fatigue coupling of materials in a low-temperature corrosion environment according to claim 1, wherein: the high-strain creep-fatigue coupling test device also comprises a digital display thermometer for monitoring the temperature in the box-shaped corrosion tank.
3. The method for testing high-strain creep-fatigue coupling of materials in a low-temperature corrosion environment according to claim 1, wherein: the rubber stopper is a conical rubber stopper.
4. The method for testing high-strain creep-fatigue coupling of materials in a low-temperature corrosion environment according to claim 1, wherein: and a horizontal flow sheet is arranged at the liquid inlet of the box-shaped corrosion groove to ensure that the corrosion solution stably flows into the box-shaped corrosion groove.
5. The method for testing high-strain creep-fatigue coupling of materials in a low-temperature corrosion environment according to claim 1, wherein: the box-shaped corrosion tank is made of an acrylic material.
6. The method for testing high-strain creep-fatigue coupling of materials in a low-temperature corrosion environment according to claim 1, wherein: the etching solution was a 3.5% NaCl solution.
7. The method for testing high-strain creep-fatigue coupling of materials in a low-temperature corrosion environment according to claim 1, wherein: the diameter of the middle thinner working section in the metal sample is 5 mm; the diameter of the clamping section with thicker two ends is 20 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110687188.1A CN113281156B (en) | 2021-06-21 | 2021-06-21 | Material high-strain creep-fatigue coupling test method under low-temperature corrosion environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110687188.1A CN113281156B (en) | 2021-06-21 | 2021-06-21 | Material high-strain creep-fatigue coupling test method under low-temperature corrosion environment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113281156A true CN113281156A (en) | 2021-08-20 |
| CN113281156B CN113281156B (en) | 2023-10-20 |
Family
ID=77285102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110687188.1A Active CN113281156B (en) | 2021-06-21 | 2021-06-21 | Material high-strain creep-fatigue coupling test method under low-temperature corrosion environment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113281156B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114544340A (en) * | 2022-02-10 | 2022-05-27 | 武汉钢铁有限公司 | Metal material strain fatigue testing device and method based on corrosion environment |
| CN115541409A (en) * | 2022-11-24 | 2022-12-30 | 东北大学 | Metal cylinder sample fatigue test device suitable for under ultra-low temperature environment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980066567U (en) * | 1997-05-13 | 1998-12-05 | 배동호 | Corrosion tank for horizontal fatigue tester |
| CN102791402A (en) * | 2010-02-05 | 2012-11-21 | 西克索马特公司 | Method and apparatus of forming a wrought material having a refined grain structure |
| CN211741011U (en) * | 2020-02-28 | 2020-10-23 | 西安建筑科技大学 | Metal material corrosion fatigue test device |
-
2021
- 2021-06-21 CN CN202110687188.1A patent/CN113281156B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980066567U (en) * | 1997-05-13 | 1998-12-05 | 배동호 | Corrosion tank for horizontal fatigue tester |
| CN102791402A (en) * | 2010-02-05 | 2012-11-21 | 西克索马特公司 | Method and apparatus of forming a wrought material having a refined grain structure |
| CN211741011U (en) * | 2020-02-28 | 2020-10-23 | 西安建筑科技大学 | Metal material corrosion fatigue test device |
Non-Patent Citations (1)
| Title |
|---|
| 施翔晶;马华;: "不同环境下对2D70铝合金低周疲劳性能的研究", 上海电气技术, no. 02 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114544340A (en) * | 2022-02-10 | 2022-05-27 | 武汉钢铁有限公司 | Metal material strain fatigue testing device and method based on corrosion environment |
| CN115541409A (en) * | 2022-11-24 | 2022-12-30 | 东北大学 | Metal cylinder sample fatigue test device suitable for under ultra-low temperature environment |
| CN115541409B (en) * | 2022-11-24 | 2023-03-07 | 东北大学 | Metal cylinder sample fatigue test device suitable for under ultra-low temperature environment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113281156B (en) | 2023-10-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105300874B (en) | Stress corrosion and survey hydrogen electrochemical in-situ measurement device under the conditions of slow strain rate | |
| CN113281156A (en) | Material high-strain creep-fatigue coupling test method under low-temperature corrosion environment | |
| CN103926146B (en) | A kind of small sample constant load stress corrosion test device and method of testing thereof | |
| CN102706750A (en) | High-temperature high-pressure constant load stress corrosion experiment method and device | |
| CN103776702A (en) | Low-cycle fatigue testing device and method under corrosion and high-temperature environments | |
| CN102854127A (en) | Contrast simulation testing device for carbon dioxide corrosion resistant performance of steel and testing method thereof | |
| CN108166001B (en) | Material cathode protection testing device and method in slow stretching state | |
| CN112098206B (en) | Bolt stress corrosion test device and test method using same | |
| CN103983507A (en) | A test device of high temperature stress corrosion of a large-size specimen | |
| US7942064B2 (en) | Method and apparatus for measurement of mechanical characteristics of a cement sample | |
| CN106596389B (en) | Reaction kettle for electrochemical test in strong corrosion medium and application method thereof | |
| CN105223127A (en) | A kind of visual reaction experiment device of high temperature resistant, high pressure | |
| CN112540109B (en) | Method and device for synchronously calculating hydrogen evolution quantity during electrochemical test | |
| CN106706511B (en) | Electrochemical reaction kettle with two open sides and application method thereof | |
| CN111504801A (en) | Device and method for performing stress corrosion experiment in high-temperature liquid phase corrosion environment | |
| CN206740608U (en) | A kind of positioning and clamping device for the detection of optical material sub-surface damage | |
| CN219245251U (en) | Wen Kongmei alloy stress corrosion test device | |
| US2270389A (en) | Apparatus for testing embrittlement characteristics of boiler waters | |
| Garcia et al. | Corrosion fatigue tests using strain gauges for measuring load and crack length | |
| RU2439537C1 (en) | Test method of thin-wall specimens under stress | |
| CN109507101B (en) | Electrode device, high-temperature high-pressure pitting potential detection device and high-temperature high-pressure pitting potential detection method | |
| CN111044584A (en) | Device and method for dynamically measuring hydrogen trap parameters of metal material | |
| CN218350081U (en) | Medical magnesium alloy in-vitro hydrogen evolution quantity measuring and electrochemical testing device | |
| CN111426572A (en) | Constant-load stress corrosion on-line observation test device under hydrofluoric acid environment | |
| CN109682727A (en) | A method of for showing high-strength steel grain size |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |