Corrosion-resistant high entropy alloy with high strength and ductility

被引:177
|
作者
Nene, S. S. [1 ]
Frank, M. [1 ]
Liu, K. [1 ]
Sinha, S. [1 ]
Mishra, R. S. [1 ]
McWilliams, B. A. [2 ]
Cho, K. C. [2 ]
机构
[1] Univ North Texas, Ctr Frict Stir Proc, Dept Mat Sci & Engn, Denton, TX 76207 USA
[2] US Army, Res Lab, Weap & Mat Res Directorate, Aberdeen Proving Ground, MD 21005 USA
关键词
High entropy alloy (HEA); Cu-HEA; Corrosion resistance; TRIP stress; TENSILE PROPERTIES; GRAIN-SIZE; STEELS; TRIP; TRANSFORMATION; MARTENSITE; BEHAVIOR; DESIGN;
D O I
10.1016/j.scriptamat.2019.03.028
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
High strength materials lack a synergistic combination of mechanical properties and corrosion resistance desired for most structural applications. Phase and grain boundary architecturing is done in the material to attain balance in these properties. A friction stir processed Fe35.5Mn20Co20Cr15Si5Cu1.5 (Cu-HEA) exhibited excellent mechanical properties and high corrosion resistance in synergy. The excellent mechanical properties were attributed to the controlled transformation of ultrafine gamma matrix and epsilon twinning; whereas good corrosion resistance was due to homogenized fine grained gamma microstructure. In short, Cu-HEA design opens a new pathway towards realizing strong and ductile alloys with tunable corrosion resistance by engineering matrix metastability. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:168 / 172
页数:5
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