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High-solid-solubility multi-principal-component alloy screening method

A multi-principal alloy and screening method technology, which is applied in the field of rapid screening of high solid-solubility multi-principal alloys, can solve problems such as poor compositional uniformity, and achieve the effect of reducing research and development costs and cycles

Active Publication Date: 2018-06-19
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

However, the mixing enthalpy and the "entropy-enthalpy ratio" based on the mixing enthalpy are not always effective. For example, for the system FeCrCuNi2Al0.5, the mixing enthalpy is -2.51kJ / mol, The "entropy-enthalpy ratio" is 11.24. Both the mixing enthalpy and the "entropy-enthalpy ratio" show that the system has a good solid solution formation ability. However, the experiment shows that the system has obvious Cu-rich phase precipitation, and the composition uniformity of the system is poor. Similar examples There are many, so I won’t go into details here

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[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] figure 1 It is the classification and summary of the existing alloy systems in the present invention. Different symbols in the figure represent different types of alloys, and solid symbols represent materials with better solid solution properties. From the left to the right are amorphous alloy materials, High-entropy alloy materials, iron-rich high-entropy alloy materials.

[0030] Application of a rapid screening method for multi-principal alloys in the Fe-Mn-Cr-Co-Ni system:

[0031] (1) According to the requirements of material performance design, select Fe, Mn, Cr, Co and Ni as the basic units of material design, and establish the basic database of related elements through literature data and calculation;

[0032] (2) Use the Monte Carlo method to generate a large number of random numbers. In order to traverse various possible alloy compositions, the amoun...

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Abstract

The invention belongs to the technical field of alloy material design, and particularly relates to a high-solid-solubility multi-principal-component alloy screening method. According to the high-solid-solubility multi-principal-component alloy screening method, components of multi-principal-component alloy are designed from the atomic level according to requirements of the multi-principal-component alloy. The high-solid-solubility multi-principal-component alloy screening method is a double-parameter screening method based on the two thermodynamic parameters, namely entropy enthalpy quotient and entropy enthalpy difference. According to the rapid screening method, Monte Carlo random sampling is used for generating millions of kinds of alloy in any component proportion, and the thermodynamic parameters, namely entropy enthalpy quotient and entropy enthalpy difference, are used for evaluating the solid solution formation capacity of the alloy, so that the multi-principal-component alloyexcellent in solid solubility is screened out from millions of kinds of alloy.

Description

technical field [0001] The invention belongs to the technical field of alloy material design, and in particular relates to a rapid screening method for multi-principal alloys with high solid solubility. Background technique [0002] The design concept of multi-principal alloys provides a new way of thinking for finding new materials, greatly expands people's understanding of materials, and provides a large number of candidate materials for materials used under various extreme conditions. Around 2004, Ye Junwei, a Taiwan scholar, and B. Cantor, a British scholar, independently proposed a multi-principal alloy called a high-entropy alloy, which opened a hot spot in the research of multi-principal alloys. It is well known that traditional materials such as steel, whose composition is mainly iron, contain one main element and their properties are also mainly determined by this element. However, there are no clear main elements in multi-principal alloys, and its basic properties...

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Application Information

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IPC IPC(8): G06F19/00
CPCG16C10/00G16C20/70G16C20/90
Inventor 郑明杰丁文艺黄群英信敬平刘少军毛小东吴宜灿
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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