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Method for predicting strength of high-entropy alloy with double-phase structure

A high-entropy alloy and strength prediction technology, which is applied in the field of high-entropy alloy phase transformation strengthening calculation, can solve the problems that the theoretical model of dual-phase high-entropy alloy phase transformation strengthening has not been established, and there is no phase interface strengthening.

Active Publication Date: 2021-09-14
HUNAN UNIV
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Problems solved by technology

[0003] So far, the corresponding theoretical model for phase transformation strengthening of dual-phase high-entropy alloys has not yet been established
In addition, there is no suitable theoretical formula for quantifying the contribution of phase interface strengthening during the phase transition

Method used

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  • Method for predicting strength of high-entropy alloy with double-phase structure
  • Method for predicting strength of high-entropy alloy with double-phase structure
  • Method for predicting strength of high-entropy alloy with double-phase structure

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Embodiment Construction

[0073] The following is attached figure 1 The given BCC phase volume fraction curve and attached figure 2 The schematic diagram of the BCC phase growth in the phase transformation process is given, a theoretical model and specific examples of the phase transformation strengthening of high-entropy alloys considering the four effects of lattice distortion, grain boundary, dislocation, and phase interface, and further elaboration on its technical scheme , the present invention is not limited to the following examples, and any design concept utilizing the present invention falls within the scope of protection of the present invention.

[0074] Lattice distortion is an inherent feature of high-entropy alloys due to the mismatch of the size and modulus of the constituent elements, which can strengthen the mechanical properties of the material; the grain boundary can hinder the dislocation and strengthen the mechanical properties of the material; It is easy to cross each other duri...

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Abstract

The invention relates to a method for predicting the strength of a high-entropy alloy with a double-phase structure. A lattice distortion theory, a grain boundary strengthening theory, a dislocation strengthening theory and a phase interface strengthening theory are effectively combined, and a relevant strength analysis theoretical model is established; wherein the influence of lattice distortion, grain boundary, dislocation and phase interface on the performance of the high-entropy alloy is considered, and quantitative calculation and analysis of the strength of the double-phase high-entropy alloy in the stretching process are achieved. The strength obtained by the calculation method provided by the invention is well matched with an experimental result. The related strengthening mechanism analyzed in the method has important significance for researching and analyzing the change of the strength of the double-phase high-entropy alloy in the stretching process. Through the analysis method, the element content of the alloy is regulated and controlled, the BCC phase volume fraction curve function is changed, and the influence of different element contents and the phase volume fraction curve function on the strength of the high-entropy alloy is researched, so that theoretical guidance is provided for the design of the high-performance high-entropy alloy.

Description

technical field [0001] The invention relates to the field of high-entropy alloy phase transformation strengthening calculation, specifically relates to the theory of lattice distortion, grain boundary strengthening theory, dislocation strengthening theory and phase interface strengthening theory. Analysis of the strength of dual-phase high-entropy alloys. Background technique [0002] In recent years, with the needs of modern industry, high-entropy alloys have been proposed and widely studied and used. Unlike most traditional alloys, high-entropy alloys are generally composed of five or more elements with equimolar or nearly equimolar ratios, and exhibit excellent mechanical properties different from traditional alloys, such as high strength, high hardness, wear resistance , corrosion resistance, high temperature stability, etc. A large number of research results have shown that entropy-stable single solid solutions with equal atomic ratios are often difficult to realize a...

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Application Information

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IPC IPC(8): G16C60/00
CPCG16C60/00
Inventor 方棋洪李甲任思危李理
Owner HUNAN UNIV
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