Eutectic medium-entropy alloy with high strength and high thermal stability and preparation method of eutectic medium-entropy alloy

A high thermal stability and high strength technology, applied in the field of alloy materials, can solve the problems of high price, hinder industrial application and development, scarce reserves, etc., to reduce the cost of alloy, ensure uniformity and castability, and good fluidity.

Active Publication Date: 2022-05-13
SHAANXI UNIV OF SCI & TECH
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Problems solved by technology

However, most of the existing eutectic medium-entropy alloys contain rare and precious metals such as Co, Hf, Ta, or national strategic metal raw materials. Although this type of eutectic medium-entropy alloy has good mechanical properties, its expensive price and scarce reserves seriously hinder Its better industrial application and development

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  • Eutectic medium-entropy alloy with high strength and high thermal stability and preparation method of eutectic medium-entropy alloy
  • Eutectic medium-entropy alloy with high strength and high thermal stability and preparation method of eutectic medium-entropy alloy
  • Eutectic medium-entropy alloy with high strength and high thermal stability and preparation method of eutectic medium-entropy alloy

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[0022] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0023] The invention provides a eutectic medium-entropy alloy with high strength and high thermal stability, including Cr, Fe, Ti and Nb with a molar percentage of 1:1:1:2, and the chemical composition is CrFeTiNb 2.0 , CrFeTiNb 2.0 The microstructure of the eutectic medium-entropy alloy is a Laves / BCC all-eutectic structure composed of a softer BCC phase and a harder Laves phase, and the volume content of the Laves phase in the structure is as high as 63%. The alloy has the characteristics of high strength and high thermal stability,...

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Abstract

The invention discloses an eutectic medium-entropy alloy with both high strength and high thermal stability and a preparation method thereof, belongs to the technical field of alloy materials, and relates to the technical field of eutectic medium-entropy alloys and preparation thereof, low-price metal raw materials of Cr, Fe, Ti and Nb are adopted, the alloy cost is greatly reduced, meanwhile, the excellent mechanical property and casting property of the alloy can be guaranteed, and the high-strength and high-thermal-stability eutectic medium-entropy alloy can be obtained. The alloy comprises Cr, Fe, Ti and Nb according to the molar ratio of 1: 1: 1: 2, and the alloy structure comprises a Laves/BCC full eutectic structure composed of a BCC phase and a Laves phase. The alloy has the characteristic of high strength and shows good high-temperature thermal stability. The alloy adopts Fe, Ti, Cr and other low-price elements, the cost is low, and the preparation method is simple and rapid, so that the alloy has potential industrial application prospects.

Description

technical field [0001] The invention belongs to the technical field of alloy materials, relates to the technical field of eutectic medium-entropy alloy and its preparation, and in particular relates to a eutectic medium-entropy alloy with high strength and high thermal stability and a preparation method thereof. Background technique [0002] Multi-principal alloy is a new type of high-performance alloy material composed of five or more elements (each element content is 5-35%). Because the design idea of ​​multi-principal alloy is different from that of traditional alloys, it enables multiple different factors to act synergistically, greatly improving the mechanical properties of the alloy such as strength, toughness, wear resistance, and corrosion resistance. [0003] As a new type of alloy material derived from multi-principal alloys, medium-entropy alloys continue to use the design idea of ​​multi-principal alloys, that is, two to four different elements are formed in an e...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C1/02
CPCC22C30/00C22C1/02Y02E30/30
Inventor 薛云龙孙浩华王玉轩冯娜伍媛婷刘长青刘虎林袁亮
Owner SHAANXI UNIV OF SCI & TECH
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