Order-disorder transition and its mechanical effects in lightweight AlCrTiV high entropy alloys

被引：26

作者：

Huang, Xuejun ^{[1
]}

Miao, Jiashi ^{[1
]}

Luo, Alan A. ^{[1
,2
]}

机构：

[1] Ohio State Univ, Dept Mat Sci & Engn, 116 W 19Th Ave, Columbus, OH 43210 USA

[2] Ohio State Univ, Dept Integrated Syst Engn, Columbus, OH 43210 USA

来源：

SCRIPTA MATERIALIA | 2022年 / 210卷

关键词：

Order-disorder phenomena; CALPHAD; Ductility; Differential scanning calorimetry (DSC); High entropy alloys; PHASE; ALUMINUM;

D O I：

10.1016/j.scriptamat.2021.114462

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This paper investigated an important order-disorder transition in lightweight AlCrTiV high entropy alloy system using CALculation of Phase Diagram (CALPHAD) modeling, differential scanning calorimetry (DSC) measurement, transmission electron microscopy (TEM) characterization and mechanical testing. It is found that increasing Ti content in AlCrTiV alloys can lower the order-disorder transition temperature, reduce ordering and introduces ductility to the alloys. The new Al10Cr10Ti70V10 alloy shows a measurable tensile elongation (1.1%) and excellent strengths (877 MPa yield strength and 889 MPa ultimate tensile strength), promising lightweight applications. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

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