A novel supersaturated medium entropy alloy with superior tensile properties and corrosion resistance

被引：122
作者：
Fu, Ao [1 ]
Liu, Bin [1 ]
Lu, Wenjun [2 ]
Liu, Bo [3 ]
Li, Jia [4 ]
Fang, Qihong [4 ]
Li, Zhiming [1 ,2 ,5 ]
Liu, Yong [1 ]
机构：
[1] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China
[2] Max Planck Inst Eisenforsch GmbH, Max Planck Str 1, D-40237 Dusseldorf, Germany
[3] Sichuan Univ, Inst Nucl Sci & Technol, Key Lab Radiat Phys & Technol, Minist Educ, Chengdu 610064, Peoples R China
[4] Hunan Univ, State Key Lab Adv Design & Mfg Vehicle Body, Changsha 410082, Peoples R China
[5] Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China
来源：
SCRIPTA MATERIALIA | 2020年 / 186卷
基金：
中国国家自然科学基金;
关键词：
Medium entropy alloys; Strength; Ductility; Corrosion resistance; Stainless materials; AUSTENITIC STAINLESS-STEEL; MECHANICAL-PROPERTIES; MICROSTRUCTURE EVOLUTION; DEFORMATION MECHANISMS; HIGH-STRENGTH; BEHAVIOR; STRESS; CARBON; AL;
D O I：
10.1016/j.scriptamat.2020.05.023
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We introduce a novel stainless equiatomic FeCrNi medium entropy alloy (MEA) with improved tensile properties and corrosion resistance. This alloy exhibits superior tensile properties with yield strength of 644 MPa, ultimate tensile strength of similar to 1.03 GPa and ductility of similar to 54 %, mainly owing to the multiple deformation mechanisms including nanotwinning, deformation induced phase transformation and solution strengthening of intersitial elements. The high content of Cr in this alloy stimulates the formation of stable passivation film, resulting in a superior corrosion resistance. This work provides a guideline for the development of high-performance stainless materials via innovative composition design and processing techniques. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：381 / 386
页数：6
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