CN109580473A - The electrochemical in-situ test device of DIC is combined under the conditions of slow strain rate tension - Google Patents
The electrochemical in-situ test device of DIC is combined under the conditions of slow strain rate tension Download PDFInfo
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- CN109580473A CN109580473A CN201910005772.7A CN201910005772A CN109580473A CN 109580473 A CN109580473 A CN 109580473A CN 201910005772 A CN201910005772 A CN 201910005772A CN 109580473 A CN109580473 A CN 109580473A
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- 238000004154 testing of material Methods 0.000 claims abstract description 16
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/02—Electrochemical measuring systems for weathering, corrosion or corrosion-protection measurement
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- G—PHYSICS
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- 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
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- G—PHYSICS
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- 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
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- 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
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- 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
- G01N2203/0075—Strain-stress relations or elastic constants
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- 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
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- 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
- G01N2203/0242—With circulation of a fluid
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- 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
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0268—Dumb-bell specimens
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- 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
- G01N2203/0647—Image analysis
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- 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
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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Abstract
The electrochemical in-situ test device of DIC is combined under the conditions of a kind of slow strain rate tension.It includes electronic universal material testing machine, DIC detection system, electrochemical in-situ test macro, liquid circulating apparatus and computer；Electrochemical in-situ test macro and DIC detection system detect the two sides of tensile sample respectively in the present invention, so that Electrochemical Test Procedure, which not will receive DIC detection system, needs to spray speckle and the interference to electrochemical measurement, guarantee more steadily to carry out in-situ test.The measurement for making DIC detection system not and will receive the interference of electrochemical in-situ testing system device and influence displacement field again simultaneously, guarantees accurately to measure.Working electrode is connected by the way of embedded conductive wires with electrochemical workstation, so that connection is stronger.Reference electrode takes external mode to be connected with electrochemical workstation with auxiliary electrode, is easily changed.
Description
Technical field
The invention belongs to electrochemical corrosion measurement engineering device technique fields, more particularly to a kind of slow strain rate tension condition
The electrochemical in-situ test device of lower combination digital image correlation technique (DIC).
Background technique
Electrochemical measurement is one of the important means of research corrosion, and previous stress corrosion electro-chemical measuring apparatus is mainly used
In the stress corrosion cracking behavior of research metal material, machine components or component.Application one is often first passed through in this course
Fixed stress or strain carries out electrochemical measurement after then unloading, and directly carries out electrochemistry original to it in stress or strain path
The device of bit test is actually rare.
Due to non-contact, the whole audience the measurement method of digital image correlation technique (DIC), with other optical measurement method phases
Than having many advantages, such as simple automation, optical path, universality and strong antijamming capability, therefore be widely used at present multi-field
In the Mechanics Performance Testing of multiple material.But DIC technology is combined to carry out the device of electrochemical in-situ measurement simultaneously to metal material
It is rare.
It is the hot spot of current research to the measurement of electrochemical behavior during the various failure modes of metal material at present.Such as
" stress corrosion and survey hydrogen electricity under the conditions of slow strain rate disclosed in the Chinese patent application of Publication No. CN 105300874
Chemical in situ measuring device ", the device use the loading method of slow strain rate tension, detect tensile sample by three electrodes
Glucose current equation variation, stress corrosion to test button and hydrogen infiltration carry out electrochemical in-situ test.Although the device is realized
To electrochemical measurement during the slow strained tensile of test button, but the device can not be in conjunction with DIC technology to test button
The analysis of displacement field and strain field is carried out, and then is accurately judged to the position of metal material crack initiation.In Publication No. CN
" electro-chemical measuring apparatus under tensile stress and corrosive medium reciprocation " disclosed in 201853775 Chinese patent application
In, stretching device is connected with tensile sample with multiple pins with bracket, location hole, load bar, corrodes container and three electrode systems
System is external in electrochemical workstation.Although the device is easy to operate and is able to satisfy electro-chemical test needs, having not can be carried out
It is analyzed it in conjunction with DIC, the disadvantages of loop control and specimen shape are unadjustable can not be carried out to solution.In addition, by
In metal material greatly all in relatively harsh environment, therefore it can fast and effeciently analyze electrification during stress corrosion
The changing rule of characteristic and strain and stress is learned, so that the position for analyzing its corrosion resisting property and crack initiation is most important, and
Experimental method before tends not to reach ideal effect, therefore lacks during slow strained tensile have a variety of function at present
The experimental provision of energy.
Summary of the invention
To solve the above-mentioned problems, the purpose of the present invention is to provide DIC is combined under the conditions of a kind of slow strain rate tension
Electrochemical in-situ test device.
In order to achieve the above object, the electrochemical in-situ of DIC is combined under the conditions of slow strain rate tension provided by the invention
Test device include electronic universal material testing machine, DIC detection system, electrochemical in-situ test macro, liquid circulating apparatus and
Computer；Wherein, the electronic universal material testing machine includes the stretching testing machine host and being mounted on test machine host
Fixture；Electrochemical in-situ test macro includes in-situ test electrolytic cell, working electrode, reference electrode, auxiliary electrode and electrochemistry
Work station；The liquid as electrolyte is contained with inside the in-situ test electrolytic cell, front end face is equipped with an organic glass
Plate window；Working electrode is made of the tensile sample as main body and the conducting wire being connected with tensile sample, in tensile sample
The inside of electrolytic cell is tested in portion's setting in situ, and upper and lower side stretches out outside in-situ test electrolytic cell and passes through stretching clamp and electronics
Universal testing machine is connected；Reference electrode and auxiliary electrode are arranged on in-situ test electrolytic cell, and tensile sample, ginseng
Pass through conducting wire respectively than electrode and auxiliary electrode to be connected with the electrochemical workstation being arranged in outside electronic universal material testing machine；
Liquid circulating apparatus includes wriggling catheter pump, peristaltic pump and wriggling pump controller；Peristaltic pump is electrolysed by conduit and in-situ test
The inside in pond is connected；DIC detection system includes DIC control system and DIC camera system, and setting is tried in electronic universal material
The front of machine is tested, and the organic glass plate window of the camera face in-situ test electrolytic cell in DIC camera system, with to answering slowly
Become drawing process and carries out real-time monitoring；Computer respectively with the test machine host on electronic universal material testing machine, electrochemistry work
It stands, the wriggling pump controller electrical connection of DIC detection system and liquid circulating apparatus.
The in-situ test electrolytic cell is made of organic glass, be in rectangular shape, top surface right side position be equipped with into
The mouth of a river, left side wall bottom are equipped with water outlet, water inlet and water outlet respectively by wriggling catheter pump on liquid circulating apparatus with
Peristaltic pump is connected；Top surface middle front part is equipped with rectangular opening, and an equal amount of rectangular opening is equipped on the bottom surface of same position；Stretch examination
It is inserted in the middle part of sample in the rectangular opening on in-situ test electrolytic cell top and bottom, upper and lower side is located at in-situ test electrolytic cell
Outside, and the rectangular opening of top surface is wound with the conducting wire being connected with tensile sample；Reference electrode is from the top of in-situ test electrolytic cell
Face rear portion is inserted into inside it, and entrance is double sleeve designs, and is able to carry out 360 ° of rotations, and end extends outwardly and forms glass fiber
Tubule, and nozzle, close to tensile sample, top is connect with conducting wire；Auxiliary electrode is made of carbon-point, from in-situ test electrolytic cell
Top surface rear portion is inserted into that its is internal and be close to inner wall, and with tensile sample keeping parallelism state, top is connect with conducting wire.
Gap between the rectangular opening and tensile sample of the in-situ test electrolytic cell top surface uses plastic film and glass
The sealing of glass glue, the gap between the rectangular opening and tensile sample of bottom surface is sealed using general plug, to prevent in-situ test electrolytic cell
During slow strain rate tension due to tensile sample upper end displacement and cause to damage.
It is former in conjunction with electrochemistry in the electrochemical in-situ test device of DIC under the conditions of slow strain rate tension provided by the invention
Bit test system and DIC detection system detect the two sides of tensile sample respectively, so that Electrochemical Test Procedure not will receive
DIC detection system needs to spray speckle and the interference to electrochemical measurement, guarantees more steadily to carry out in-situ test.Together
When make DIC detection system again not and will receive the interference of electrochemical in-situ testing system device and influence the measurement of displacement field, protect
Card can be measured accurately.Working electrode is connected by the way of embedded conductive wires with electrochemical workstation, so that connection is more
Add securely.Reference electrode takes external mode to be connected with electrochemical workstation with auxiliary electrode, is easily changed.The present apparatus is stablized
Reliably, the electro-chemical test the stress corrosion environment under the conditions of slow strain rate tension, can be realized stress corrosion
In the process in conjunction with the electrochemical in-situ test and analysis of DIC, and other materials can be solved and need the electrochemistry in conjunction with DIC former
The problem of bit test.
Detailed description of the invention
Fig. 1 is the electrochemical in-situ test device Central Plains that DIC is combined under the conditions of slow strain rate tension provided by the invention
Bit test electrolytic cell composition schematic diagram.
Fig. 2 is the electrochemical in-situ test device structure that DIC is combined under the conditions of slow strain rate tension provided by the invention
Schematic diagram.
Fig. 3 is under the conditions of slow strain rate tension provided by the invention in conjunction with drawing in the electrochemical in-situ test device of DIC
Stretch sample schematic diagram.
Specific embodiment
In the following with reference to the drawings and specific embodiments to the electricity for combining DIC under the conditions of slow strain rate tension provided by the invention
Chemical in situ test device is described in detail.
As shown in Fig. 1-Fig. 3, surveyed under the conditions of slow strain rate tension provided by the invention in conjunction with the electrochemical in-situ of DIC
Trial assembly is set including electronic universal material testing machine 7, DIC detection system 9, electrochemical in-situ test macro, liquid circulating apparatus 12
With computer 10；Wherein, the electronic universal material testing machine 7 includes test machine host and is mounted on test machine host
Stretching clamp；Electrochemical in-situ test macro includes in-situ test electrolytic cell 1, working electrode 2, reference electrode 3, auxiliary electrode 4
With electrochemical workstation 8；The liquid as electrolyte is contained with inside the in-situ test electrolytic cell 1, front end face is equipped with one
A organic glass plate window；Working electrode 2 is by the tensile sample 11 as main body and the conducting wire structure being connected with tensile sample 11
At the inside of electrolytic cell 1 is tested in the middle part setting of tensile sample 11 in situ, and upper and lower side stretches out outside in-situ test electrolytic cell 1
And it is connected by stretching clamp with electronic universal material testing machine 7；Reference electrode 3 and auxiliary electrode 4 are arranged at in-situ test
On electrolytic cell 1, and tensile sample 11, reference electrode 3 and auxiliary electrode 4 by conducting wire and are arranged in electronic universal material respectively
Electrochemical workstation 8 outside testing machine 7 is connected；Liquid circulating apparatus 12 includes that wriggling catheter pump, peristaltic pump and peristaltic pump drive
Dynamic device；Peristaltic pump is connected by conduit with the inside of in-situ test electrolytic cell 1；DIC detection system 9 includes DIC control system
And DIC camera system, the front of electronic universal material testing machine 7 is set, and the camera face in DIC camera system is former
The organic glass plate window of bit test electrolytic cell 1, to carry out real-time monitoring to slow strained tensile process；Computer 10 respectively with electricity
Test machine host, electrochemical workstation 8, DIC detection system 9 and liquid circulating apparatus 12 on sub- universal testing machine 7
The electrical connection of wriggling pump controller.
The in-situ test electrolytic cell 1 is made of organic glass, is in rectangular shape, top surface right side position be equipped with into
The mouth of a river 5, left side wall bottom are equipped with water outlet 6, and water inlet 5 and water outlet 6 pass through the peristaltic pump on liquid circulating apparatus 12 respectively
Conduit is connected with peristaltic pump；Top surface middle front part is equipped with rectangular opening, and an equal amount of rectangular opening is equipped on the bottom surface of same position；
The middle part of tensile sample 11 is inserted in the rectangular opening on 1 top and bottom of in-situ test electrolytic cell, and upper and lower side is located in situ survey
The outside of electrolytic cell 1 is tried, and the rectangular opening of top surface is wound with the conducting wire being connected with tensile sample 11；Reference electrode 3 is from original position
The top surface rear portion of test electrolytic cell 1 is inserted into inside it, and entrance is double sleeve designs, and is able to carry out 360 ° of rotations, and end is outside
Extend and form capillary glass tube, and nozzle, close to tensile sample 11, top is connect with conducting wire；Auxiliary electrode 4 is made of carbon-point,
Be inserted into that its is internal and be close to inner wall from the top surface rear portion of in-situ test electrolytic cell 1, and with 11 keeping parallelism state of tensile sample, top
End is connect with conducting wire.
Gap between the rectangular opening and tensile sample 11 of 1 top surface of in-situ test electrolytic cell using plastic film and
Glass cement sealing, the gap between the rectangular opening and tensile sample 11 of bottom surface are sealed using general plug, to prevent in-situ test electric
Solve pond 1 during slow strain rate tension due to 11 upper end of tensile sample displacement and cause to damage.
The work of the electrochemical in-situ test device of DIC will be now combined under the conditions of slow strain rate tension provided by the invention
Principle is described below:
In-situ test electrolytic cell 1 is assembled by testing crew first, the upper and lower side of tensile sample 11 is then passed through into stretching
Fixture is connected with electronic universal material testing machine 7, to prevent present apparatus excessive shock in drawing process, and in-situ test is electrolysed
Gap between pond 1 and tensile sample 11 is sealed using plastic film, glass cement and general plug envelope, can guarantee in situ survey in this way
Being passed through after electrolyte solution in examination electrolytic cell 1 is not in leaked liquid phenomenon, and 11 upper end of tensile sample in drawing process
Caused displacement will not damage in-situ test electrolytic cell 1；Later by the camera face in-situ test in DIC camera system
At the organic glass plate window of electrolytic cell 1.Computer 10 is opened, under the control of computer 10, is tried using electronic universal material
It tests machine 7 to stretch tensile sample 11 using the method for slow strain rate tension, makes tensile sample 11 and in-situ test electricity
Pond 1 is solved in quasistatic process, and acquire experimental data using electrochemical workstation 8；In the process, liquid is utilized
Peristaltic pump in circulator 12 constantly recycles the electrolyte solution in in-situ test electrolytic cell 1；It is controlled using DIC control system
DIC camera system real-time monitoring tensile test specimen 11 is during slow strain rate tension perpendicular to 11 surface direction of tensile test specimen
Displacement field is tested so that DIC detection can be achieved at the same time with electrochemical in-situ.
Claims (3)
1. combining the electrochemical in-situ test device of DIC under the conditions of a kind of slow strain rate tension, it is characterised in that: the electricity
Chemical in situ test device include electronic universal material testing machine (7), DIC detection system (9), electrochemical in-situ test macro,
Liquid circulating apparatus (12) and computer (10)；Wherein, the electronic universal material testing machine (7) include test machine host and
The stretching clamp being mounted on test machine host；Electrochemical in-situ test macro includes in-situ test electrolytic cell (1), working electrode
(2), reference electrode (3), auxiliary electrode (4) and electrochemical workstation (8)；It is held inside the in-situ test electrolytic cell (1)
There is the liquid as electrolyte, front end face is equipped with an organic glass plate window；Working electrode (2) is by the stretching examination as main body
Sample (11) and the conducting wire being connected with tensile sample (11) are constituted, and electrolytic cell is tested in the middle part setting of tensile sample (11) in situ
(1) inside, upper and lower side stretch out in-situ test electrolytic cell (1) outside and pass through stretching clamp and electronic universal material testing machine
(7) it is connected；Reference electrode (3) and auxiliary electrode (4) are arranged on in-situ test electrolytic cell (1), and tensile sample (11),
By conducting wire and the electrochemistry external in electronic universal material testing machine (7) is arranged respectively in reference electrode (3) and auxiliary electrode (4)
Work station (8) is connected；Liquid circulating apparatus (12) includes wriggling catheter pump, peristaltic pump and wriggling pump controller；Peristaltic pump passes through
Conduit is connected with the inside of in-situ test electrolytic cell (1)；DIC detection system (9) includes DIC control system and DIC camera shooting
System is arranged in the front of electronic universal material testing machine (7), and the camera face in-situ test electricity in DIC camera system
The organic glass plate window of Xie Chi (1), to carry out real-time monitoring to slow strained tensile process；Computer (10) respectively with electronics ten thousand
Test machine host, electrochemical workstation (8), DIC detection system (9) and liquid circulating apparatus in energy Material Testing Machine (7)
(12) wriggling pump controller electrical connection.
2. the electrochemical in-situ test device of DIC is combined under the conditions of slow strain rate tension according to claim 1, it is special
Sign is: the in-situ test electrolytic cell (1) is made of organic glass, is in rectangular shape, and top surface right side position is equipped with
Water inlet (5), left side wall bottom are equipped with water outlet (6), and water inlet (5) and water outlet (6) pass through liquid circulating apparatus respectively
(12) the wriggling catheter pump on is connected with peristaltic pump；Top surface middle front part is equipped with rectangular opening, is equipped on the bottom surface of same position same
The rectangular opening of sample size；The rectangular opening being inserted in the middle part of tensile sample (11) on in-situ test electrolytic cell (1) top and bottom
Interior, upper and lower side is located at the outside of in-situ test electrolytic cell (1), and the rectangular opening of top surface is wound with and is connected with tensile sample (11)
Conducting wire；Reference electrode (3) is inserted into inside it from the top surface rear portion of in-situ test electrolytic cell (1), and entrance is double sleeve designs, and
Be able to carry out 360 ° of rotations, end extends outwardly and forms capillary glass tube, and nozzle is close to tensile sample (11), top with lead
Line connection；Auxiliary electrode (4) is made of carbon-point, is inserted into its internal and abutting from the top surface rear portion of in-situ test electrolytic cell (1)
Wall, and with tensile sample (11) keeping parallelism state, top is connect with conducting wire.
3. the electrochemical in-situ test device of DIC is combined under the conditions of slow strain rate tension according to claim 2, it is special
Sign is: the gap between the rectangular opening and tensile sample (11) of described in-situ test electrolytic cell (1) top surface is thin using plastics
Film and glass cement sealing, the gap between the rectangular opening and tensile sample (11) of bottom surface is sealed using general plug, to prevent original position
Test electrolytic cell (1) during slow strain rate tension due to tensile sample (11) upper end displacement and cause to damage.
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| CN201910005772.7A CN109580473A (en) | 2019-01-03 | 2019-01-03 | The electrochemical in-situ test device of DIC is combined under the conditions of slow strain rate tension |
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| CN201910005772.7A CN109580473A (en) | 2019-01-03 | 2019-01-03 | The electrochemical in-situ test device of DIC is combined under the conditions of slow strain rate tension |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110044806A (en) * | 2019-05-13 | 2019-07-23 | 中国民航大学 | Image, sound emission, electrochemistry integrated stress corrosion cracking in-situ testing device |
| CN110095336A (en) * | 2019-06-04 | 2019-08-06 | 青岛科技大学 | A kind of online sound emission of tank bottom stress corrosion-electrochemistry Collaborative experiment device |
| CN111795894A (en) * | 2020-09-08 | 2020-10-20 | 四川轻化工大学 | Non-contact type method and system for measuring large deformation of uniaxial stretching of high polymer plastic material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111795894A (en) * | 2020-09-08 | 2020-10-20 | 四川轻化工大学 | Non-contact type method and system for measuring large deformation of uniaxial stretching of high polymer plastic material |
| CN111795894B (en) * | 2020-09-08 | 2020-12-08 | 四川轻化工大学 | Non-contact type method and system for measuring large deformation of uniaxial stretching of high polymer plastic material |
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