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Method and device for observing bending failure process of metal materials by gradient curvature method

A technology of bending damage of metal materials, applied in the direction of measuring devices, using stable bending force to test the strength of materials, analyzing materials, etc., can solve problems such as constraints, influence of test devices and observation instruments, complex structure of devices, etc., to reduce installation Effects of difficulty, increased stability and independence, and reduced installation difficulty

Active Publication Date: 2022-06-17
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] The present invention intends to provide a device for observing the bending failure process of metal materials by the gradual curvature method, so as to solve the problems of complex structure of the device and the mutual influence and restriction of the test device and the observation instrument when observing the change of the bending stress of the material.

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  • Method and device for observing bending failure process of metal materials by gradient curvature method
  • Method and device for observing bending failure process of metal materials by gradient curvature method
  • Method and device for observing bending failure process of metal materials by gradient curvature method

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Embodiment 1

[0048] Embodiment 1 is basically as attached figure 1 shown:

[0049] A device for observing the bending failure process of metal materials by the method of gradual curvature .6-3.2, the elongation is 8-15%, and the length of the metal material sample is greater than the test length.

[0050] The device includes an integral molding die 1. The molding die 1 is provided with a metal material sample inlet and a metal bending molding space 2 in sequence. The metal bending molding space 2 and the metal material sample inlet are located on the side of the molding die 1. The material sample inlet is communicated with the metal bending forming space 2, and the metal bending forming space 2 where the curvature is the smallest is closest to the metal sample inlet. The longitudinal surface of the metal bending forming space 2 is in the shape of continuous gradient curvature, the side where the longitudinal surface of the metal bending forming space 2 on the forming mold 1 is located is...

Embodiment 3

[0063] A method for observing the bending failure process of a metal material by a gradient curvature method: the device structure of the first embodiment and the Ni metal material sample electroplated on the surface of the titanium alloy TC4 are adopted, and the following steps are included:

[0064] S1. Prepare the titanium alloy TC4 surface electroplating Ni metal material sample, and process the titanium alloy TC4 surface electroplating Ni metal material sample into a long strip test sample that meets the requirements of size and surface roughness. In this test, the titanium alloy TC4 surface electroplating The size of the Ni metal material sample is 60mm*10mm*1mm, and the roughness is Ra1.6-3.2.

[0065] S2. The side surface of the metal material sample is ground and polished, so as to facilitate the observation of crack initiation and expansion of the Ni metal material sample electroplated on the surface of the titanium alloy TC4.

[0066] S3. Slowly push one end of the ...

Embodiment 4

[0075] A method for observing the bending failure process of a metal material by a gradient curvature method: the device structure of the second embodiment and the Ni metal material sample electroplated on the surface of the titanium alloy TC4 are adopted, and the following steps are included:

[0076] S1. Prepare the titanium alloy TC4 surface electroplating Ni metal material sample, and process the titanium alloy TC4 surface electroplating Ni metal material sample into a long strip test sample that meets the requirements of size and surface roughness. In this test, the titanium alloy TC4 surface electroplating The size of the Ni metal material sample is 40mm*10mm*1mm, and the roughness is Ra1.6-3.2.

[0077] S2, grinding and polishing the observation side surface of the metal material sample, so as to facilitate the observation of crack initiation and expansion of the metal material sample.

[0078] S3. Put the metal material sample on the concave mold 4 to ensure that it is...

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Abstract

The invention relates to the field of physical analysis of materials, and discloses a method and a device for observing the bending failure process of metal materials by a gradual curvature method. Including the forming unit, the forming unit is provided with a metal material sample inlet, the forming unit is provided with a metal bending forming space connected with the metal material sample inlet, the cross section of the metal bending forming space and the cross section of the metal material sample Adaptation; the plane where the longitudinal plane of the metal bending forming space on the forming unit is located is the observation plane, and the longitudinal plane of the metal bending forming space is in the shape of continuous gradient curvature. The invention solves the problem that the structure of the device is complex and the mutual influence and restriction of the test device and the observation instrument are solved when observing the change of the microstructure of the bending stress of the material.

Description

technical field [0001] The invention relates to the field of physical analysis of materials, in particular to a method and a device for observing the bending failure process of metal materials by a gradient curvature method. Background technique [0002] With the advancement and development of science and technology, the use of materials has become more and more extensive, and the conditions of use have become increasingly complex and harsh. Therefore, the problems of material failure are more complicated, and the consequences of material failure are more serious. The important root cause of these consequences lies in the lack of testing ability and lack of sufficient understanding of the influence of the internal structure of the material on the performance and the failure mechanism. Therefore, we have a deep understanding of the failure mechanism of the material and explore the microstructure of the material under stress conditions. The process of change and failure is of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/20G01N3/02
CPCG01N3/20G01N3/02
Inventor 赵一舟闻福林冯开庆郑登智赵建华辜诚王亚军
Owner CHONGQING UNIV