System and method for detecting PLC effect of alloy

A detection system and alloy technology, applied in the direction of applying stable tension/pressure to test the strength of materials, measuring devices, and preparation of test samples, can solve the problems that it is difficult to observe the nucleation, proliferation and space-time evolution characteristics of alloy PLC bands , to achieve the effect of strong anti-natural interference ability, simple equipment and high measurement accuracy

Inactive Publication Date: 2020-11-03
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, the above method is also difficult to observe the PLC band nucleation, proliferation and spatial evolution characteristics of the alloy in the high temperature environment.

Method used

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  • System and method for detecting PLC effect of alloy
  • System and method for detecting PLC effect of alloy
  • System and method for detecting PLC effect of alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The composition (wt.%) of the alloy used in this example is as follows: Co 30%, Cr 20%, Ti 1%, Al 0.65%, W 1.5%, Mo 4%, C 0.02%, Zr 0.015%, B 0.015%, Ni in the balance.

[0054] Use the following steps to test the PLC effect:

[0055] Step (1): The above-mentioned metal material is processed into a plate-shaped tensile sample by wire electric discharge cutting, and the gauge length section of the prepared tensile sample has a size of 25mm×5mm×1.25mm;

[0056] Step (2): Evenly spray the surface of the tensile sample with a high-temperature-resistant white primer. The thickness of the white primer is 0.2mm. Put the tensile sample in a drying oven and dry it at 80°C for 15 minutes; then spray a high-temperature-resistant black paint. The black paint is randomly attached to the white primer in small spots. Put the tensile sample into the drying oven and dry it at 80°C for 10 minutes to form high-temperature scattered spots;

[0057] Step (3): Heat the heating and holding ...

Embodiment 2

[0061] The composition (wt.%) of the alloy used in this example is as follows: Co 25%, Cr 15%, Ti 4%, Al 1.5%, W 1.5%, Mo 3%, C 0.02%, Zr 0.015%, B 0.015%, Ni in the balance.

[0062] Use the following steps to test the PLC effect:

[0063] Step (1): The above-mentioned metal material is processed into a plate-shaped tensile sample by wire electric discharge cutting, and the gauge length section of the prepared tensile sample has a size of 25mm×5mm×1.25mm;

[0064] Step (2): Spray evenly the surface of the tensile sample with a high-temperature-resistant white primer. The thickness of the white primer is 0.3 mm. Put the tensile sample in a drying oven and dry it at 100°C for 15 minutes; then spray with a high-temperature-resistant black paint , the black paint is randomly attached to the white primer in small spots, put the tensile sample into the drying oven, and dry at 100°C for 10 minutes to form high-temperature scattered spots;

[0065] Step (3): Heat the heating and ho...

Embodiment 3

[0069] The composition (wt.%) of the alloy that adopts in the present embodiment is as follows:

[0070] Co 25%, Cr 15%, Ti 4%, Al 1.5%, W 1.5%, Mo 3%, C 0.02%, Zr 0.015%, B 0.015%, Ni in the balance.

[0071] Use the following steps to test the PLC effect:

[0072] Step (1): The metal material to be tested is processed into a plate-shaped tensile sample by WEDM, and the gauge length section of the prepared tensile sample has a size of 25mm×5mm×1.25mm;

[0073] Step (2): Spray evenly the surface of the tensile sample with a high-temperature-resistant white primer. The thickness of the white primer is 0.5 mm. Put the tensile sample in a drying oven and dry it at 150°C for 15 minutes; then spray with a high-temperature-resistant black paint , the black paint is randomly attached to the white primer in small spots, put the tensile sample into the drying oven, and dry it at 150°C for 10 minutes to form high-temperature scattered spots;

[0074] Step (3): Heat the heating and hol...

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Abstract

The invention provides a system and method for detecting a PLC effect of alloy. The system comprises a deformation loading device and a three-dimensional deformation full-field measurement device, thedeformation loading device comprises a clamping part; the clamping part is used for clamping the to-be-tested part to carry out a deformation test; speckles are arranged on the surface of the to-be-tested part; the three-dimensional deformation full-field measuring device is used for recording speckle changes of the to-be-tested part in the deformation process. According to the system and the method for detectin the PLC effect of the alloy, nucleation, proliferation and space-time evolution behaviors of an alloy PLC belt in a high-temperature environment can be accurately measured, and a deformation localization phenomenon generated when the PLC effect is generated is visually and vividly displayed.

Description

technical field [0001] The application belongs to the technical field of alloy performance testing, and in particular relates to a detection system and a detection method for the PLC effect of alloys. Background technique [0002] Currently, Portevin-Le The (PLC) effect is a plastic instability phenomenon that occurs in most alloys in a certain strain rate and deformation temperature range. The PLC effect usually manifests as a continuous yield phenomenon on the stress-strain curve (in the time domain). During the deformation process, the load curve presents a jagged shape due to repeated stress drops, so the PLC effect is also called a zigzag flow; at the same time, it appears in the airspace For deformation localization, that is, the severe deformation is concentrated in the local area of ​​the specimen, usually in the form of a band, called the PLC band. The appearance of this localized plastic deformation band will form obvious band marks on the surface of the alloy, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/18G01N3/06G01N1/28G01N1/44
CPCG01N1/28G01N1/44G01N3/068G01N3/18G01N2203/0075G01N2203/0226G01N2203/0682
Inventor 张瑞崔传勇周亦胄孙晓峰
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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