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Method for measuring alloy phase interface strength

A technology of interfacial strength and alloy phase, which is used in measuring devices, testing material hardness, and preparation of samples for testing.

Pending Publication Date: 2022-05-27
XIAN UNIV OF TECH
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for measuring the strength of the alloy phase interface, which solves the problem that it is difficult to accurately measure the strength of different phase interfaces in the prior art

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  • Method for measuring alloy phase interface strength
  • Method for measuring alloy phase interface strength
  • Method for measuring alloy phase interface strength

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Embodiment

[0034] Taking TC21 titanium alloy as an example, the strength of different types of α / β phase interfaces is calculated. For other second-phase strengthening metal materials, the same method can be selected to achieve.

[0035] Step 1. Heat-treating the TC21 alloy to obtain a p / β, α s / β and α p / β+α s (where: α p is the primary α phase in beta titanium alloys, α s It is the secondary α phase in β titanium alloy) several typical α / β phase interface structures;

[0036] Step 2. Electropolish and corrode the surface of the TC21 alloy sample treated in Step 1. The microstructure of the alloy is as follows: Figure 1a ,b;

[0037] Step 3, marking the surface of the sample processed in step 2;

[0038] Step 4. Use EBSD technology to test the grain orientation distribution;

[0039] Step 5. Obtain the microstructure distribution map according to step 2, combine the surface marking in step 3 and the grain orientation distribution map of the sample obtained in step 4, select t...

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Abstract

The invention discloses a method for measuring the phase interface strength of an alloy, which comprises the following steps: carrying out heat treatment on the alloy to obtain an alloy sample containing a phase interface structure; the surface of the alloy sample is treated, and the microstructure of the alloy is displayed; dividing the surface of the treated alloy sample into a plurality of areas, and marking; performing grain orientation testing on the surface of the treated alloy sample to obtain a grain orientation distribution diagram of the surface of the sample; according to the sample surface marks and the grain orientation distribution diagram, selecting the interiors of grains in the same orientation, and processing same-size micron-scale samples containing different phases and different types of phase interfaces; carrying out compression deformation on the micron-sized samples to obtain a compression stress-strain curve, and further obtaining the yield strength of each micron-sized sample; and according to the yield strength of each micron-sized sample, the strength of different phase interfaces is calculated by using a sample strength mixing rule. The superposition influence of the grain boundary and different interface structures on mechanical behaviors is eliminated, and the strength of different phase interfaces can be accurately measured.

Description

technical field [0001] The invention belongs to the technical field of alloy materials, and relates to a method for measuring the interface strength of alloy phases. Background technique [0002] The second phase strengthening is one of the most important strengthening methods of metal materials. The strengthening effect of the second relative alloy depends not only on the strength, size, shape and distribution of the second phase, but also on the interface strengthening between the second phase and the matrix. For example, in the field of titanium alloys, α-phase strengthening is the main strengthening method. However, α-phase matrix has lower strength and is more easily deformed than β-phase matrix. The strengthening of α-phase relative to β-phase matrix mainly depends on the α / β interface strengthening. In order to meet the requirements of strong-plastic matching of alloys, the field of titanium alloy design attempts to obtain a certain number of primary α phases (α phas...

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Application Information

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IPC IPC(8): G01N1/28G01N1/32G01N23/203G01N3/42
CPCG01N1/28G01N1/32G01N23/203G01N3/42
Inventor 潘艳赵泉谭长生张国君
Owner XIAN UNIV OF TECH
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