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Microstructure observation device applicable to metal material bending deformation

A technology of microstructure and metal materials, applied in measuring devices, using stable bending force to test the strength of materials, analyzing materials, etc., can solve the problem of not being able to test the characteristics of metal microscopic deformation field

Active Publication Date: 2016-03-02
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this device cannot test the microscopic deformation field characteristics of metals during bending deformation.

Method used

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  • Microstructure observation device applicable to metal material bending deformation
  • Microstructure observation device applicable to metal material bending deformation
  • Microstructure observation device applicable to metal material bending deformation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0042] Taking DP590 steel with a thickness of 0.5mm as the research object, the test process specifically includes the following steps:

[0043] 1) Sample preparation: wire cut the DP590 steel plate to 0.5mm or more, then grind it to a thickness of 0.5mm, and use nitric acid alcohol solution for metallographic corrosion.

[0044] 2) Installation of the lifting mechanism: install the lifting mechanism on the top of the door frame-shaped bracket by bolts; then first adjust the rotation wheel 1 and rotation 2 to the initial position through the hydraulic system, that is, the lower edge and the chuck of the rotation wheel 1 and the rotation wheel 2 The clamping surfaces of the first and the second chuck are kept at the same level; then the rotary wheel 1 and the rotary wheel 2 are raised by the hydraulic system until the lower edges of the rotary wheel 1 and the rotary wheel 2 and the installed sample The upper surface is flush; finally, the turning wheel 1 and turning wheel 2 are kept...

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Abstract

The present invention relates to a microstructure observation device applicable to metal material bending deformation, and belongs to the field of metal plastic forming. The microstructure observation device applicable to metal material bending deformation includes a mechanical stretching module, a mechanical test module and a bending module. The center of a sample to be tested is located above a bending roller in the bending module; two sides of the sample to be tested pass under a rotating wheel 1 and a rotating wheel 2 of the bending module, and two ends of the sample are clamped by a chuck 1 and a chuck 2 of the mechanical stretching module; tensile load is applied to both ends of the sample to be tested, and the sample to be tested is subjected to bending deformation at the bending roller position; and the microscopic deformation field characteristics of the deformation zone of the sample to be tested is measured by a microscope, and the macroscopic mechanical property parameters of the sample to be tested under corresponding deformation conditions are obtained by the mechanical test module. The device realizes the in-situ observation of field of the maximum deformation zone in the bending process of metal, and macroscopic mechanical properties of the material are established by a mechanical sensor and a displacement sensor.

Description

Technical field [0001] The invention relates to the field of metal plastic forming, in particular to a microstructure observation device suitable for tensile and bending deformation of metal materials. Background technique [0002] Micro (mesoscopic) plastic forming technology, due to its unique advantages such as high efficiency, low cost, high volume, high precision, high density, short cycle, no pollution, and net forming, the produced parts have high strength, high precision, High quality and other characteristics have become a new hot spot in the research field and industry. The non-uniformity of the material structure and its micro-deformation characteristics at the mesoscopic scale have an impact on the macro-mechanical properties of the material. Especially for multiphase metal materials under mesoscopic forming, the non-uniformity of the microstructure becomes more obvious due to the existence of soft and hard microstructures. Therefore, in the process of mesoscopic pl...

Claims

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Application Information

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IPC IPC(8): G01N3/06G01N3/08G01N3/20
Inventor 但文蛟张卫刚任闯缑瑞宾黄婷婷
Owner SHANGHAI JIAO TONG UNIV
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