CrMnFeCoNi high entropy alloys with carbon and nitrogen: mechanical properties, wear and corrosion resistance

被引：23

作者：

Chmielak, L. ^{[1
,2
]}

Roncery, L. Mujica ^{[3
]}

Niederhofer, P. ^{[1
,2
]}

Weber, S. ^{[1
]}

Theisen, W. ^{[1
]}

机构：

[1] Ruhr Univ Bochum, Inst Werkstoffe, Lehrstuhl Werkstofftech, D-44780 Bochum, Germany

[2] Deutsch Edelstahlwerke Specialty Steel GmbH & Co, D-58452 Witten, Germany

[3] Univ Pedag & Tecnol Colombia, Grp Invest Mat Siderurg & INCITEMA, Boyaca, Colombia

来源：

SN APPLIED SCIENCES | 2021年 / 3卷 / 11期

关键词：

High-entropy alloys; Interstitial elements; Mechanical properties; Wear; Corrosion; MICROSTRUCTURE; EVOLUTION; STRESS; STEELS;

D O I：

10.1007/s42452-021-04814-y

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The use of interstitial elements has been a key factor for the development of different kinds of steels. However, this aspect has been little explored in the field of high entropy alloys (HEAs). In this investigation, the effect of carbon and nitrogen in a near-equiatomic CrMnFeCoNi HEA is studied, analyzing their impact on the microstructure, and mechanical properties from 77K to 673K, as well as wear, and corrosion resistance. Carbon and nitrogen are part of the FCC solid solution and contribute to the formation of precipitates. An increase in the yield and ultimate tensile strength accompanied with a decrease in the ductility are the main effects of C and N. The impact toughness of the interstitial-free material is higher than that of C and C+N alloyed systems. Compared to CrNi and CrMn austenitic steels, the wear resistance of the alloys at room temperature is rather low. The surface corrosion resistance of HEAs is comparable to austenitic steels; nevertheless HEAs are more susceptible to pitting in chloride containing solutions.

引用

页数：12

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