In-situ uniaxial tension observation device for mesoscale metal material

A metal material, uniaxial stretching technology, applied in the field of metal plastic forming

Inactive Publication Date: 2014-02-12
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no report on the in-situ observation device

Method used

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  • In-situ uniaxial tension observation device for mesoscale metal material
  • In-situ uniaxial tension observation device for mesoscale metal material
  • In-situ uniaxial tension observation device for mesoscale metal material

Examples

Experimental program
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Effect test

Embodiment 1

[0056] Taking the DP590 steel plate with a thickness of 0.5mm as the research object, the working process of this embodiment is divided into the following steps:

[0057] (1) Sample preparation: DP590 steel plates with a thickness of 0.5 mm or more were cut to a thickness of 0.5 mm or more by wire cutting, and then ground to a thickness of 0.5 mm by a grinder, and metallographic corrosion was carried out using ordinary 5% Nital (alcohol nitric acid) solution.

[0058] (2) Preparation before the equipment experiment: start the DC servo motor 1, return the two oppositely moving chucks 11 and 2 14, and when the chucks are completely close together, use the middle of the sample grinding area as a reference. The reverse DC servo motor 1 moves the two chucks to the position where the sample can be clamped, and makes a mark on the sample 13.

[0059] (3) Sample clamping: open chuck one 11 and chuck two 14 respectively, clamp the sample 13 according to the pre-made marks of the sample...

Embodiment 2

[0062] Taking the TRIP590 steel plate with a thickness of 0.5mm as the research object, the working process of this embodiment is divided into the following steps:

[0063] (1) Sample preparation: wire-cut the TRIP590 steel plate above 0.5mm to be above 0.5mm, and then use a grinder to grind to a thickness of 0.5mm; the sample is mechanically polished after conventional inlay, rinsed with alcohol and dried with cold air, and immediately put into fresh Corrosion in 4% picric acid (2,4,6-trinitrophenol, C6H3N3O7) alcohol solution (picric alcohol) for 10-20s, add a few drops of hydrochloric acid to the bitter alcohol to sharpen the grain boundary (after confirming, Hydrochloric acid can also strengthen the contrast between the two tissues, see other people's literature on corrosion for details.), rinse with alcohol and dry with cold air; then immediately put it into fresh 1% Na2S2O5 aqueous solution for 10-20s coloring, Avoid shaking the sample to prevent the colorant from fallin...

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Abstract

The invention relates to an in-situ uniaxial tension observation device for a mesoscale metal material. The in-situ uniaxial tension observation device comprises a mechanical part, a macro mechanical parameter test part and a micro deformation field test part, wherein a sample to be tested is clamped through a clamping module and is arranged on a supporting module; tension loads are simultaneously applied to two ends of the test sample in a transmission manner through a transmission module; microscopic equipment and an in-situ data acquisition system are used for acquiring micro structure change features of the test sample under conditions of different deformation degrees to construct a microscale deformation field feature under a condition of macro deformation; meanwhile, a force test module and a displacement test module are used for acquiring macro mechanical performance parameters under corresponding deformation conditions. Compared with the prior art, the in-situ uniaxial tension observation device has the advantages of accuracy and timeliness in in-situ data acquisition and the like.

Description

technical field [0001] The invention belongs to the field of metal plastic forming devices, in particular to an in-situ observation device for the microstructure of the deformation zone during plastic forming of mesoscale metal materials, which can be used to investigate the microstructure deformation characteristics of mesoscale metal materials during plastic deformation. Background technique [0002] With the development of modern industrial technology, micro-electromechanical systems (MEMS), aerospace, medical, electronic communications, textile printing and dyeing, and pure hydrogen-fueled proton exchange membrane fuel cell (PEMFC) vehicles have greatly increased the demand for micro-components and products. Increase. However, the wide application of micro-components manufactured by traditional micro-processing technologies (such as ultra-precision machining, deep reactive ion etching, LIGA and quasi-LIGA technology, etc.) is greatly limited due to high manufacturing cos...

Claims

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Application Information

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IPC IPC(8): G01N3/08G01N3/04G01B11/16
Inventor 但文蛟张卫刚刘飞
Owner SHANGHAI JIAO TONG UNIV
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