利用基于calphad的新型合金设计模型解析Al-Co-Cr-Fe-Ni体系中FCC/B2的形成

IF 5.6 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Scripta Materialia Pub Date : 2025-10-10 DOI:10.1016/j.scriptamat.2025.117043

J. Joseph, P.D. Hodgson, M.R. Barnett, D.M. Fabijanic

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引用次数: 0

摘要

建立了两相（FCC/B2）选择规则，用于设计类似铸态AlCoCrFeNi2.1的共晶高熵合金（EHEA）；(a)利用calpha对FCC/ b2结构Al-Co-Cr-Fe-Ni合金合金元素的相形成能力和(b) Al-Co-Cr-Fe-Ni合金空间的计算探索。提出的选择规则是(Ni+Co)/ al比、Co/(Ni+Co)-比和Cr/(Fe+Cr)-比之间的关系，揭示了尚未开发的FCC/B2共晶相场。低(Ni+Co)/ al比和高Cr/ al比的组合可能是设计新型铸态al -Co-Cr- fe -Ni基EHEAs（如Al15Co9.5Cr18Fe29Ni28.5超高屈服强度856 MPa合金）的关键。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Deciphering eutectic (FCC/B2) formation in Al-Co-Cr-Fe-Ni system using a novel CALPHAD-based alloy design model

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Deciphering eutectic (FCC/B2) formation in Al-Co-Cr-Fe-Ni system using a novel CALPHAD-based alloy design model

Two-phase (FCC/B2) selection rules were established for the design of eutectic high entropy alloys (EHEA) similar to as-cast AlCoCrFeNi_2.1 using; (a) the phase-formation capabilities of the alloying elements of the reported FCC/B2-structured Al-Co-Cr-Fe-Ni alloys using CALPHAD and (b) computational exploration of the Al-Co-Cr-Fe-Ni alloy space. The presented selection rules are developed as a relationship between (Ni+Co)/Al-ratio, Co/(Ni+Co)-ratio and Cr/(Fe+Cr)-ratio and unveils large unexplored FCC/B2 eutectic-phase field. A combination of low (Ni+Co)/Al-ratio and high Cr/Al-ratio within the developed relationship may be the key to the design novel as-cast Al-Co-Cr-Fe-Ni-based EHEAs such as Al₁₅Co_9.5Cr₁₈Fe₂₉Ni_28.5 alloy with ultra-high yield strength of 856 MPa.

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来源期刊

Scripta Materialia 工程技术-材料科学：综合

CiteScore

11.40

自引率

5.00%

发文量

581

审稿时长

34 days

期刊介绍： Scripta Materialia is a LETTERS journal of Acta Materialia, providing a forum for the rapid publication of short communications on the relationship between the structure and the properties of inorganic materials. The emphasis is on originality rather than incremental research. Short reports on the development of materials with novel or substantially improved properties are also welcomed. Emphasis is on either the functional or mechanical behavior of metals, ceramics and semiconductors at all length scales.