Hydrogen Embrittlement of CoCrFeMnNi High-Entropy Alloy Compared with 304 and IN718 Alloys

被引：13

作者：

Feng, Zheng ^{[1
]}

Li, Xinfeng ^{[2
]}

Song, Xiaolong ^{[1
]}

Gu, Tang ^{[3
]}

Zhang, Yong ^{[4
]}

机构：

[1] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China

[2] Sun Yat Sen Univ, Sino French Inst Nucl Engn & Technol, Zhuhai 519082, Peoples R China

[3] Harbin Engn Univ, Coll Mech & Elect Engn, Harbin 150001, Peoples R China

[4] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

来源：

METALS | 2022年 / 12卷 / 06期

关键词：

CoCrFeMnNi; hydrogen embrittlement; high-entropy alloy; twin; MECHANICAL-PROPERTIES; INCONEL; 718; ASSISTED CRACK; HIGH-STRENGTH; RESISTANCE; BEHAVIOR; MULTISCALE; STRAIN; PHASE; MICROSTRUCTURE;

D O I：

10.3390/met12060998

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The hydrogen embrittlement (HE) behaviors of a CoCrFeMnNi high-entropy alloy (HEA), 304 stainless steel (304SS) and IN718 alloys were studied and compared via electrochemical hydrogen pre-charging, slow strain rate tensile tests, and fracture surface analysis. The results demonstrate that the HEA exhibited the greatest HE-resistance, followed by 304SS and then IN718 alloy, when the alloys were charged at 1.79 mA cm(-2) for 24 h and 48 h, and 179 mA cm(-2) for 2 h. Hydrogen-induced reduction in ductility was observed for 304SS and IN718 alloys, whereas the hydrogen-affected fracture strain of the HEA was dependent on the hydrogen charging time. The resistance to HE was improved at a short hydrogen charging time (24 h), but reduced at a long charging time (48 h). This is attributed to the competing mechanisms between hydrogen-enhanced twin formation and HEDE (hydrogen-enhanced decohesion).

引用

页数：18

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