Sample for testing dynamic tensile property of titanium alloy subjected to adiabatic shearing

A dynamic stretching and adiabatic shearing technology, which is used in the preparation of test samples, the application of stable tension/pressure to test the strength of materials, and the sampling, etc., to prevent additional damage caused by large loads and eliminate interference.

Active Publication Date: 2021-07-16
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The widely used test of the dynamic tensile properties of materials is usually based on th...

Method used

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  • Sample for testing dynamic tensile property of titanium alloy subjected to adiabatic shearing
  • Sample for testing dynamic tensile property of titanium alloy subjected to adiabatic shearing
  • Sample for testing dynamic tensile property of titanium alloy subjected to adiabatic shearing

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0035] The invention provides a sample used for testing the dynamic tensile performance of titanium alloy after adiabatic shearing. Specifically, as a specific embodiment of the present invention, the preparation process of a sample for testing the dynamic tensile properties of a titanium alloy after adiabatic shearing includes the following steps:

[0036] (1) Process the sample blank into such as figure 1 structure shown. Specifically, the two ends of the sample blank are processed into a half-thread shape as the supporting end 1, and the boss 3 to be impacted is processed on one side of the parallel working section 2 between the two supporting ends 1; A through hole 4 is processed on the top, and the shape of the boss 3 to be impacted and the shape of the rectangular through hole 4 can be selected according to needs. For example, a rectang...

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Abstract

The invention discloses a sample for testing the dynamic tensile property of a titanium alloy subjected to adiabatic shearing. The sample is prepared by the following method which comprises the steps of (1) respectively processing supporting ends at two ends of a sample blank, processing a boss to be impacted and a through hole corresponding to the boss to be impacted on a parallel working section between the two supporting ends, forming shearing supporting columns on two sides of the through hole, and forming a supporting column connecting section between the two shearing supporting columns; (2) placing the sample blank on a Hopkinson pressure bar experimental device for impact compression loading, and forming an adiabatic shear band in the direction of a connecting line of the outer side of the boss to be impacted and the inner side of the shearing supporting column; (3) determining the depth of cracks at the two ends of the adiabatic shear band on the parallel working section; (4) processing the parallel working section through linear cutting equipment till only the adiabatic shear band penetrates through the parallel working section; and (5) grinding the linear cutting surface, and removing reversing marks left by linear cutting.

Description

technical field [0001] The invention relates to a sample used for testing the dynamic tensile performance of a titanium alloy after adiabatic shearing, belonging to the field of material performance testing. Background technique [0002] Titanium alloy has excellent characteristics such as high strength, low density, good corrosion resistance and high temperature resistance, and is an important structural material in the fields of aviation, aerospace, weapons, etc. It is usually subjected to dynamic loads during use, such as during service Impact, explosion, penetration, etc. in these applications require materials to have a certain ability to withstand dynamic loads. A large number of studies have shown that under the action of dynamic loads, titanium alloys usually undergo adiabatic shearing. It is generally believed that when the adiabatic shear band appears in the local position of the material, it indicates that the original bearing capacity of the material will drop s...

Claims

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Application Information

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IPC IPC(8): G01N1/28G01N3/08
CPCG01N1/28G01N1/286G01N3/08G01N2001/2873G01N2203/0017
Inventor 刘睿骆雨萌惠松骁叶文君于洋宋晓云李艳锋陶海明魏衍广崔雪飞罗峥
Owner GRIMAT ENG INST CO LTD
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