Hydrogen-induced nanohardness variations in a CoCrFeMnNi high-entropy alloy

被引：42

作者：

Zhao, Yakai ^{[1
]}

Lee, Dong-Hyun ^{[1
]}

Lee, Jung-A ^{[1
]}

Kim, Woo-Jin ^{[1
]}

Han, Heung Nam ^{[2
]}

Ramamurty, Upadrasta ^{[3
]}

Suh, Jin-Yoo ^{[4
]}

Jang, Jae-il ^{[1
]}

机构：

[1] Hanyang Univ, Div Mat Sci & Engn, Seoul 04763, South Korea

[2] Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 08826, South Korea

[3] Indian Inst Sci, Dept Mat Engn, Bangalore 560012, Karnataka, India

[4] Korea Inst Sci & Technol, High Temp Energy Mat Res Ctr, Seoul 02792, South Korea

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2017年 / 42卷 / 16期

基金：

新加坡国家研究基金会;

关键词：

High-entropy alloy; Hydrogen; Nanoindentation; Thermal desorption spectroscopy; MECHANICAL-PROPERTIES; STORAGE PROPERTIES; DISLOCATION NUCLEATION; NANOCRYSTALLINE; BEHAVIOR; NI; MICROSTRUCTURE; SUSCEPTIBILITY; DEFORMATION; STABILITY;

D O I：

10.1016/j.ijhydene.2017.02.061

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The influence of electrochemically charged hydrogen (H) on the hardness (H-N) of a CoCrFeMnNi high-entropy alloy (HEA) was investigated with nanoindentation. Upon charging, H-N of HEA increases by similar to 60%, which decreases gradually during subsequent aging at room temperature, and on prolonged aging, the alloy softens to an extent that H-N falls below that of the uncharged HEA. These H-induced mechanical property variations are rationalized in terms of the competition between solid solution hardening caused by H and excess vacancy creation due to deeply trapped H. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：12015 / 12021

页数：7

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