CN111426722A - Device and method for rapidly determining recrystallization temperature of metal material - Google Patents
Device and method for rapidly determining recrystallization temperature of metal material Download PDFInfo
- Publication number
- CN111426722A CN111426722A CN202010210554.XA CN202010210554A CN111426722A CN 111426722 A CN111426722 A CN 111426722A CN 202010210554 A CN202010210554 A CN 202010210554A CN 111426722 A CN111426722 A CN 111426722A
- Authority
- CN
- China
- Prior art keywords
- temperature
- sample
- recrystallization
- load
- metal material
- 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
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/14—Investigating or analyzing materials by the use of thermal means by using distillation, extraction, sublimation, condensation, freezing, or crystallisation
- G01N25/147—Investigating or analyzing materials by the use of thermal means by using distillation, extraction, sublimation, condensation, freezing, or crystallisation by cristallisation
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention belongs to the technical field of metal material processing and heat treatment, and relates to a device and a method for quickly and accurately testing the recrystallization temperature of a metal material. The device consists of a loading mechanism, an atmosphere protection heating furnace, a sample stage and a data acquisition computer. The testing method is characterized in that the recrystallization temperature of the metal material is determined by collecting the load-temperature change of the three-point bending sample in the continuous temperature rise process. According to the invention, a large amount of samples can be studied for 1-2 days in the past only by using one sample for 1-2 hours, and the method has the advantages of small sample preparation amount, convenience in equipment operation, rapidness in determining the recrystallization temperature, low operation cost and the like; the load-temperature curve is automatically obtained in real time, manual tests such as a hardness test method and a metallographic test method are reduced, errors and manual interference are greatly reduced, and the accuracy is high.
Description
The technical field is as follows:
the invention belongs to the technical field of metal material processing and heat treatment, and relates to a method and a device for quickly determining the recrystallization temperature of a metal material.
Background art:
after the metal material is subjected to cold machining and warm machining plastic deformation, not only the internal organization structure and various properties are obviously changed, but also the metal material is in a thermodynamically unstable high free energy state due to the increase of defects such as vacancies, distortion, dislocation and the like. After the plastically deformed metal material is heated to a certain temperature, new grains without distortion are generated in the original deformed structure again, and the performance is obviously changed and is restored to the state before deformation, and the process is called recrystallization [ Hu 36179;, Xiang, Chua 29667, Yonghua. material science foundation, 3 edition [ M ]. Shanghai traffic university Press, 2010 ].
The recrystallization characteristics determine the hot working process (stress relief annealing process, aging annealing process and the like), the final performance (fine grain strengthening, recrystallization texture and the like) and the high-temperature service limit (single crystal blade recrystallization failure and the like) of the metal material; meanwhile, the metal recrystallization theory is one of the most basic scientific problems of material science, and the determination of the recrystallization characteristics of the metal material has important theoretical significance and application value.
The most critical parameter for recrystallization of metallic materials is the recrystallization temperature. The minimum temperature at which recrystallization of a metal subjected to large cold deformation (plastic deformation of 70% or more) can be completed within 1 hour of holding time is defined as the recrystallization temperature. At present, the methods for testing the recrystallization temperature of metal materials mainly comprise a metallographic microstructure analysis method, a hardness test method, a resistance test method, an X-ray diffraction method, a thermal analysis method and the like, and various methods are applied in different fields, but have the following problems: 1) the metallographic structure analysis method and the hardness test method are time-consuming, labor-consuming, low in efficiency and high in cost, and the recrystallization initial temperature of the metallographic structure analysis method is difficult to clearly define; 2) the resistance testing method has lower testing precision, and the recrystallization initial temperature is difficult to accurately test; 3) the X-ray diffraction method has long analysis and test time, low efficiency, special equipment and non-visual result; 4) the thermal analysis technology has the defects of expensive equipment, inconvenient operation, small size of a required test sample and difficulty in reflecting the overall characteristics of the material [ Lemneli, Liu Zheng, Wang Zhi, and the like ] the detection method for the recrystallization of the single crystal high-temperature alloy [ P ] the invention patent of China, the application number is 201710027990.1, and the application time is 2017-06-20; wangchuan, Kangyonglin, Marshalai, et al, ultra-low carbon aluminum killed steel cold-rolled sheet recrystallization temperature and performance research [ J ] hot working process, 2011,40(6): 36-39; determination of cold-rolled sheet annealing process for hot-dip galvanized steel sheet [ J ] physicochemical examination (physical itemization), 2009,45(10):595-598 ].
In contrast, the hardness test method is one of the more effective methods for determining the recrystallization temperature of an annealed metal sample by measuring the change in the hardness value of the annealed metal sample with the annealing temperature or the annealing time. For example, Sunzhua et al invented a new method for testing the recrystallization temperature of a cold-rolled strip steel sample by using a variable-temperature durometer device, which can quickly complete hardness value tests of different temperature points and determine the recrystallization temperature [ Sunzhua, Zhang Yunfei, Liu Bian, etc.. A rapid detection method for the recrystallization temperature of cold-rolled strip steel [ J ]. the invention patent of China, application No. 201610425022.1, application time 2016-11-09 ]. Von rock Qing et al invented a method for measuring the recrystallization temperature of steel for stamping, which measures the recrystallization temperature of cold-rolled deep-drawing steel of different compositions by using a laboratory small heat treatment furnace to simulate the hood-type production temperature rise rate, and determines the recrystallization temperature according to the hardness value change of air-cooled cold-rolled sheets discharged from the furnace at different temperatures [ Von rock Qing, Zhangxiao, Kangling ] quick detection method of recrystallization temperature of cold-rolled strip steel [ J ]. Chinese invention patent, application No. 201210185480.4, application time: 2012.06.01 ]. However, the hardness testing method needs to test the hardness of samples at multiple temperature points, and still has the disadvantages of large sample preparation quantity, long operation time, high operation cost, or the need of expensive equipment such as a variable temperature hardness tester, and the like.
Particularly for age-strengthened metal materials, the alloy is subjected to age precipitation hardening while recrystallization occurs, and the hardness of the alloy comprises the effects of recrystallization softening and precipitation hardening of the alloy, so that the recrystallization temperature of the tested alloy is inaccurate, and the like. Therefore, the recrystallization temperature test of the aging precipitation strengthening type metal material is a difficult problem troubling researchers for a long time, and a proper solution is not found yet.
The invention aims at the characteristics that the time required by precipitation strengthening of the metal material is long (generally more than 1 h) [ L ei Q, L i S, Zhu J, et. Micromicrotructural evolution, phase transition, and physics properties of high strain Cu-Ni-Si-Al alloy [ J ]. Materials characteristics, 2019,147: 315-.
The invention content is as follows:
the invention aims to provide a device and a method for quickly and accurately testing the recrystallization temperature of a metal material.
The invention provides a method for determining the recrystallization temperature of a metal material according to a load-temperature curve of a three-point bending sample in a continuous temperature rise process, and develops a device for quickly determining the recrystallization temperature of the metal material, wherein the technology has the advantages of quickness, time saving, energy saving, accuracy, low cost and the like; in particular, the difficult problem that the recrystallization temperature of the precipitation strengthening type metal material is difficult to accurately measure by the existing method can be better solved by utilizing the characteristics of long time required by precipitation strengthening and short time required by recrystallization softening of the metal material,
the device for rapidly determining the recrystallization temperature of the metal material, disclosed by the invention, is shown in the attached figure 1 and mainly comprises a loading mechanism, an atmosphere protection heating furnace, a sample table and a data acquisition computer. The loading mechanism consists of a pressure adjusting device (1), a positioning rod (2), a connecting threaded disc (3), a pressure sensor (4), a connecting threaded sleeve (5), a tightening nut (6), a quartz glass pressure rod (7) and a support frame (14), and the atmosphere protection heating furnace consists of an argon pipe (8), a thermocouple (9) and a heating furnace body (13). Pressure adjusting device (1) is arranged on support frame (14), its bottom is connected with pressure sensor (4) through connecting thread dish (3), connecting thread dish (3) are spacing to ensure straight line action from top to bottom through locating lever (2), pressure sensor (4) are connected and are fixed with tightening nut (6) through connecting thread cover (5) and quartz glass depression bar (7), on U-shaped sample platform (12) were arranged in to sample (11) that awaits measuring, quartz glass depression bar (7) pass heating furnace body (13), and exert load to sample (11) that awaits measuring, argon gas pipe (8) and thermocouple (9) pass heating furnace body (13) and stretch into the furnace body inside. And the data acquisition computer (10) is connected with the thermocouple (9) and the pressure sensor (4) and acquires and records temperature and pressure data in real time.
A method for measuring the recrystallization temperature by adopting the device is characterized in that the recrystallization temperature of the metal material is determined by collecting the load-temperature change of a three-point bending sample in the continuous temperature rise process, and the test steps are as follows:
(1) placing a sheet sample to be tested on a U-shaped sample table, and applying a fixed load to the sample to be tested through a loading mechanism;
(2) introducing argon from an argon pipe; nitrogen may be introduced according to the specific material of the test sample.
(3) Continuously heating by an atmosphere protection heating furnace, and selecting a heating rate according to needs;
(4) the temperature and load changes during continuous heating were collected and recorded by a computer and the experiment was stopped when the load was substantially constant.
The atmosphere protection heating furnace is used for heating a sample to be tested, adopts a resistance heating mode, has the highest temperatures of 600 ℃, 1000 ℃ and 1500 ℃, is respectively used for metal materials with low temperature, medium temperature and high temperature recrystallization temperature, has the heating rate adjustable within the range of 0.01 ℃/s-0.5 ℃/s, and can be filled with argon, nitrogen and the like to form a protective atmosphere. The loading mechanism is mainly used for applying pressure of 0-200N to a test sample. The measured data of the pressure sensor and the thermocouple are automatically collected and recorded by a computer.
The steps for testing the recrystallization temperature of the metal material comprise: placing a sheet sample to be tested on a U-shaped sample table, applying a fixed load to the sample to be tested through a loading mechanism, and then introducing argon through an argon pipe (nitrogen can also be introduced according to the specific material of the sample to be tested); continuously heating through a heating furnace body, and selecting a heating rate according to requirements; the change of temperature and load in the continuous heating process is collected and recorded by a data collecting computer, and the experiment is stopped when the load is basically constant; finally, the recrystallization start temperature and the recrystallization finish temperature of the sample were determined from two inflection points in the collected load-temperature curve (as shown in FIG. 2).
The invention has the advantages that:
(1) according to the invention, a large amount of samples can be studied for 1-2 days in the past only by using one sample for 1-2 hours, and the method has the advantages of small sample preparation amount, convenience in equipment operation, rapidness in determining the recrystallization temperature, low operation cost and the like;
(2) the invention adopts the load-temperature curve to automatically obtain in real time, reduces the need of manual tests such as a hardness test method, a metallographic test method and the like, greatly reduces errors and human interference and has high accuracy.
Drawings
FIG. 1 is a schematic view of an apparatus for rapidly determining a recrystallization temperature of a metallic material according to the present invention,
the reference numbers are: the device comprises a pressure adjusting device (1), a positioning rod (2), a connecting threaded disc (3), a pressure sensor (4), a connecting threaded sleeve (5), a tightening nut (6), a quartz glass pressure rod (7), an argon pipe (8), a thermocouple (9), a data acquisition computer (10), a sample (11), a sample table (12), a heating furnace body (13) and a support frame (14).
Fig. 2 is a typical load-temperature curve measured by the present invention.
The specific implementation mode is as follows:
example 1: recrystallization temperature determination of 70% cold-rolled H85 brass
(1) Taking an H85 brass sample (with the length of 60mm, the width of 10mm and the thickness of 0.5mm) with the cold rolling deformation of 70%, carrying out three-point bending deformation under the protection of argon, and keeping the load unchanged by 20N;
(2) continuously heating the heat treatment furnace at a heating rate of 0.5 ℃/s, and recording a continuous heating load-temperature change curve as shown in FIG. 2;
(3) and (4) accurately analyzing the recrystallization temperature of the alloy according to the temperature rise load-temperature change curve of the metal material.
Example 2: determination of recrystallization temperature of 90% Cold-deformed Cu-Cr-Zr alloy
(1) Taking a C18150 sample (70 mm in length, 15mm in width and 1.0mm in thickness) with the cold rolling deformation of 90%, and carrying out three-point bending deformation under the protection of argon gas to keep the load to be 25N unchanged;
(2) continuously heating the heat treatment furnace at a heating rate of 0.5 ℃/s, and recording a continuous heating load-temperature change curve;
(3) and (4) accurately analyzing the recrystallization temperature of the alloy according to the temperature rise load-temperature change curve of the metal material.
Claims (3)
1. A device for rapidly determining the recrystallization temperature of a metal material is characterized by comprising a loading mechanism, an atmosphere protection heating furnace, a sample table (12) and a data acquisition computer (10); the loading mechanism consists of a pressure adjusting device (1), a positioning rod (2), a connecting threaded disc (3), a pressure sensor (4), a connecting threaded sleeve (5), a tightening nut (6), a quartz glass pressure rod (7) and a support frame (14), and the atmosphere protection heating furnace consists of an argon pipe (8), a thermocouple (9) and a heating furnace body (13); the pressure adjusting device (1) is arranged on a support frame (14), the bottom of the pressure adjusting device is connected with a pressure sensor (4) through a connecting threaded disc (3), the connecting threaded disc (3) is limited by a positioning rod (2) to ensure vertical linear motion, the pressure sensor (4) is connected with a quartz glass pressure rod (7) through a connecting threaded sleeve (5) and is fixed by a tightening nut (6), a sample (11) to be measured is arranged on a U-shaped sample table (12), the quartz glass pressure rod (7) penetrates through a heating furnace body (13) and applies load to the sample (11) to be measured, and an argon gas pipe (8) and a thermocouple (9) penetrate through the heating furnace body (13) and extend into the furnace body; and the data acquisition computer (10) is connected with the thermocouple (9) and the pressure sensor (4) and acquires temperature and pressure data in real time.
2. A method for measuring a recrystallization temperature using the apparatus according to claim 1, wherein the recrystallization temperature of the metal material is determined by collecting a load-temperature change of the three-point bent test piece during continuous temperature rise, and the measuring step is:
(1) placing a sheet sample to be tested on a U-shaped sample table, and applying a fixed load to the sample to be tested through a loading mechanism;
(2) introducing argon or nitrogen from an argon pipe;
(3) continuously heating by an atmosphere protection heating furnace, and selecting a heating rate according to needs;
(4) collecting and recording the changes of temperature and load in the continuous heating process through a computer, and stopping the experiment when the load is basically constant;
(5) and determining the recrystallization starting temperature or the recrystallization finishing temperature of the sample according to the inflection point in the collected load-temperature curve.
3. The method of claim 2, wherein the atmosphere protection heating furnace employs a resistance heating method, the maximum temperatures are 600 ℃, 1000 ℃ and 1500 ℃, and are used for the metal materials of the low temperature, the medium temperature and the high temperature recrystallization temperature, respectively; the heating rate is adjustable within the range of 0.01 ℃/s-0.5 ℃/s, and argon and nitrogen can be filled to form protective atmosphere; the loading mechanism is used for applying pressure of 0-200N to the test sample.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010210554.XA CN111426722B (en) | 2020-03-24 | 2020-03-24 | Device and method for rapidly determining recrystallization temperature of metal material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010210554.XA CN111426722B (en) | 2020-03-24 | 2020-03-24 | Device and method for rapidly determining recrystallization temperature of metal material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111426722A true CN111426722A (en) | 2020-07-17 |
| CN111426722B CN111426722B (en) | 2022-04-19 |
Family
ID=71549007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010210554.XA Active CN111426722B (en) | 2020-03-24 | 2020-03-24 | Device and method for rapidly determining recrystallization temperature of metal material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111426722B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111812144A (en) * | 2020-07-22 | 2020-10-23 | 湖北戈碧迦光电科技股份有限公司 | Method for determining secondary pressing temperature range of optical glass |
| CN113791111A (en) * | 2021-08-06 | 2021-12-14 | 中国科学院合肥物质科学研究院 | Method for measuring recrystallization temperature by utilizing internal consumption of metal material |
| CN113933177A (en) * | 2021-09-22 | 2022-01-14 | 北京科技大学 | Method for rapidly determining aging system of metal material |
| CN111426722B (en) * | 2020-03-24 | 2022-04-19 | 北京科技大学 | Device and method for rapidly determining recrystallization temperature of metal material |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB915178A (en) * | 1960-02-10 | 1963-01-09 | Indugas Gessellschaft Fur Ind | Improvements in or relating to the manufacture of electric steel sheet and strip |
| JP2003073168A (en) * | 2001-08-30 | 2003-03-12 | Tokai Konetsu Kogyo Co Ltd | Reactive sintered silicon carbide heating element |
| JP2004263248A (en) * | 2003-03-03 | 2004-09-24 | Jfe Steel Kk | Method for manufacturing high-tensile steel excellent in ctod characteristic of weld zone |
| JP4006460B1 (en) * | 2006-05-26 | 2007-11-14 | 株式会社神戸製鋼所 | Copper alloy excellent in high strength, high conductivity and bending workability, and method for producing the same |
| CN101476092A (en) * | 2009-01-08 | 2009-07-08 | 上海交通大学 | Temperature changing stress shot blasting method for metallic material |
| CN102519803B (en) * | 2011-12-30 | 2014-06-04 | 华东理工大学 | Multi-head miniature test specimen creep experiment device and test method |
| CN106093103A (en) * | 2016-06-15 | 2016-11-09 | 河北钢铁股份有限公司 | The method for quick of cold-strip steel recrystallization temperature |
| CN110702543A (en) * | 2019-11-15 | 2020-01-17 | 中国科学院金属研究所 | Ceramic material performance characterization device for investment casting and use method thereof |
| CN110823713A (en) * | 2019-11-07 | 2020-02-21 | 湘潭大学 | Three-point bending detection device for high-temperature mechanical property of material |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111426722B (en) * | 2020-03-24 | 2022-04-19 | 北京科技大学 | Device and method for rapidly determining recrystallization temperature of metal material |
-
2020
- 2020-03-24 CN CN202010210554.XA patent/CN111426722B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB915178A (en) * | 1960-02-10 | 1963-01-09 | Indugas Gessellschaft Fur Ind | Improvements in or relating to the manufacture of electric steel sheet and strip |
| JP2003073168A (en) * | 2001-08-30 | 2003-03-12 | Tokai Konetsu Kogyo Co Ltd | Reactive sintered silicon carbide heating element |
| JP2004263248A (en) * | 2003-03-03 | 2004-09-24 | Jfe Steel Kk | Method for manufacturing high-tensile steel excellent in ctod characteristic of weld zone |
| JP4006460B1 (en) * | 2006-05-26 | 2007-11-14 | 株式会社神戸製鋼所 | Copper alloy excellent in high strength, high conductivity and bending workability, and method for producing the same |
| CN101476092A (en) * | 2009-01-08 | 2009-07-08 | 上海交通大学 | Temperature changing stress shot blasting method for metallic material |
| CN102519803B (en) * | 2011-12-30 | 2014-06-04 | 华东理工大学 | Multi-head miniature test specimen creep experiment device and test method |
| CN106093103A (en) * | 2016-06-15 | 2016-11-09 | 河北钢铁股份有限公司 | The method for quick of cold-strip steel recrystallization temperature |
| CN110823713A (en) * | 2019-11-07 | 2020-02-21 | 湘潭大学 | Three-point bending detection device for high-temperature mechanical property of material |
| CN110702543A (en) * | 2019-11-15 | 2020-01-17 | 中国科学院金属研究所 | Ceramic material performance characterization device for investment casting and use method thereof |
Non-Patent Citations (2)
| Title |
|---|
| A. FOROOZMEHR等: "Effects of thermo-mechanical parameters on microstructure and mechanical properties of Ti-50 at.%Ni shape memory alloy produced by VAR method", 《MATERIALS SCIENCE AND ENGINEERING A》 * |
| 赵敏等: "热处理对挤压铸造TiB2-/6061AL复合材料组织与性能的影响", 《中国有色金属学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111426722B (en) * | 2020-03-24 | 2022-04-19 | 北京科技大学 | Device and method for rapidly determining recrystallization temperature of metal material |
| CN111812144A (en) * | 2020-07-22 | 2020-10-23 | 湖北戈碧迦光电科技股份有限公司 | Method for determining secondary pressing temperature range of optical glass |
| CN113791111A (en) * | 2021-08-06 | 2021-12-14 | 中国科学院合肥物质科学研究院 | Method for measuring recrystallization temperature by utilizing internal consumption of metal material |
| CN113933177A (en) * | 2021-09-22 | 2022-01-14 | 北京科技大学 | Method for rapidly determining aging system of metal material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111426722B (en) | 2022-04-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111426722B (en) | Device and method for rapidly determining recrystallization temperature of metal material | |
| Lara et al. | Nondestructive assessing of the aging effects in 2205 duplex stainless steel using thermoelectric power | |
| CN110595908A (en) | High-temperature ductility crack quasi-in-situ test method for nickel-based alloy welding material | |
| CN106093103A (en) | The method for quick of cold-strip steel recrystallization temperature | |
| Deevi et al. | Yielding, hardening and creep behavior of iron aluminides | |
| Vitzthum et al. | In-situ analysis of the thermoelastic effect and its relation to the onset of yielding of low carbon steel | |
| Yang et al. | Application of small punch test to investigate mechanical behaviours and deformation characteristics of Incoloy800H | |
| Torres et al. | Study of the kinetics of the recrystallization of cold-rolled low-carbon steel | |
| RU2498280C1 (en) | Method for determining temperature of full polymorphous transformation of heat-resistant two-phase titanium alloys of (alpha+beta)-martensitic class | |
| Viswanathan et al. | Dilatometric technique for evaluation of the kinetics of solid-state transformation of maraging steel | |
| CN106290454A (en) | A kind of method measuring cast titanium alloy beta transus temperature | |
| Liu et al. | Eddy current assessment of the cold rolled deformation behavior of AISI 321 stainless steel | |
| CN112326084B (en) | Method for measuring residual stress of texture-containing material by utilizing X-ray | |
| Donato et al. | A remotely operated FIMEC apparatus for the mechanical characterization of neutron irradiated materials | |
| Lyubimova et al. | Consideration of intrastructural stresses in the processes connected with the effect of structural nonuniformity on corrosion damages inflicted to heat-transfer tubes | |
| Ebert et al. | Intercomparison of thermophysical property measurements on iron and steels | |
| Mohapatra et al. | The austenite to ferrite transformation of Fe–Ni under the influence of a uniaxially applied tensile stress | |
| CN108548836A (en) | The end hardening test device and method of aluminum alloy hardenability | |
| Harvey II et al. | Detection of fatigue macrocracks in 1100 aluminum from thermomechanical data | |
| CN113125258A (en) | Method for measuring mechanical property of metal material | |
| US2986922A (en) | Method for testing metals | |
| CN116377352B (en) | Method for realizing equivalent annealing by applying pressure to material | |
| RU2248539C2 (en) | Method of measuring temperature of polymorph transformation in two-phased titanium alloys | |
| CN111638238B (en) | Method for measuring reverse transformation austenite by adopting expansion method | |
| CN114323884B (en) | Preparation method of Super304H austenitic stainless steel coarse grains |
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 |