Enhancing hydrogen embrittlement resistance of medium entropy alloys by forming dislocation cell walls

被引：14

作者：

Chung, Duk Hyun ^{[1
,2
]}

Kim, Young Kyun ^{[1
]}

Kim, Yong Keun ^{[1
]}

Song, Sang Yoon ^{[3
]}

Kwon, Heoun Jun ^{[1
]}

Sohn, Seok Su ^{[3
]}

Na, Young Sang ^{[1
]}

机构：

[1] Korea Inst Mat Sci, Extreme Mat Res Inst, Dept Special Alloys, Chang Won, South Korea

[2] Chungnam Natl Univ, Dept Mech Engn, Daejeon, South Korea

[3] Korea Univ, Dept Mat Sci & Engn, Seoul, South Korea

来源：

CORROSION SCIENCE | 2023年 / 215卷

关键词：

Medium entropy alloys (MEAs); Hydrogen embrittlement; Stacking fault energy; Hydrogen trapping sites; Dislocation cell walls; STACKING-FAULT ENERGY; STRESS-CORROSION; GRAIN; BEHAVIOR; STEELS; MICROSTRUCTURES; BOUNDARIES; FRACTURE; CRACKING; CARBON;

D O I：

10.1016/j.corsci.2023.111023

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Hydrogen embrittlement is a complex phenomenon resulting in severe deterioration of ductility or load-bearing capacity of structural metals due to the presence of hydrogen atoms. In order to discover hydrogen-tolerant metals, in this work, we introduce two novel face-centered-cubic phase medium entropy alloys (MEAs) (Cr12Ni12MnxFe76-x, x = 24 and 16). Interestingly, The Cr12Ni12Mn24Fe52 alloy showed high resistance to hydrogen embrittlement at ambient temperature, while exhibiting an increase in strength and ductility. Through experimental assessment, we demonstrate that the stacking fault energy and the resultant dislocation structures enable our MEA to achieve hydrogen-compatible characteristics.

引用

页数：11

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