Strengthening of ultrafine-grained equiatomic CoCrFeMnNi high-entropy alloy by nitrogen addition

被引：46

作者：

Jodi, Dennis Edgard ^{[1
]}

Park, Joohyun ^{[2
]}

Park, Nokeun ^{[1
,3
]}

机构：

[1] Yeungnam Univ, Sch Mat Sci & Engn, 280 Daehak Ro, Gyeongbuk 38541, South Korea

[2] Hanyang Univ, Dept Mat Engn, Ansan 15588, South Korea

[3] Yeungnam Univ, Inst Mat Technol, 280 Daehak Ro, Gyeongbuk 38541, South Korea

来源：

MATERIALS LETTERS | 2020年 / 258卷

基金：

新加坡国家研究基金会;

关键词：

Metals and alloys; High-entropy alloys; Nitrogen; Precipitate; Microstructure; Mechanical properties; PRECIPITATION; MICROSTRUCTURE;

D O I：

10.1016/j.matlet.2019.126772

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A design of precipitate-containing, ultrafine-grained equiatomic CoCrFeMnNi high-entropy alloy with the addition of nitrogen was introduced. The introduction of nitrogen led to the formation of Cr- and N-rich precipitate of Cr2N on the low temperature-annealed N-CoCrFeMnNi. It was noticed that the presence of nitrogen in N-CoCrFeMnNi suppressed the formation of r-phase precipitate generally observed in low temperature-annealed CoCrFeMnNi system. Furthermore, it was observed that the addition of nitrogen could be utilized as a viable method in enhancing the mechanical properties of ultrafine-grained CoCrFeMnNi matrix, in which the addition of nitrogen successfully led to an improved yield strength and ultimate tensile strength of the ultrafine-grained CoCrFeMnNi system. (C) 2019 Elsevier B.V. All rights reserved.

引用

页数：4

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