Intergranular precipitation-enhanced wetting and phase transformation in an Al0.4CoCrFeNi high-entropy alloy exposed to lead-bismuth eutectic

被引：18

作者：

Gong, Xing ^{[1
]}

Auger, Thierry ^{[2
]}

Zhu, Wenjian ^{[1
]}

Lei, Huasheng ^{[3
]}

Xiang, Congying ^{[3
]}

Yu, Zhiyang ^{[3
]}

Short, Michael P. ^{[4
]}

Wang, Pei ^{[5
]}

Yin, Yuan ^{[1
]}

机构：

[1] Shenzhen Univ, Coll Phys & Optoelect Engn, Dept Nucl Sci & Technol, Adv Nucl Energy Res Team, Shenzhen 518060, Peoples R China

[2] HESAM Univ, CNRS, Arts & Metiers ParisTech, PIMM, 151 Blvd LHop, F-75013 Paris, France

[3] Fuzhou Univ, Coll Chem, State Key Lab Photocatalysis Energy & Environm, Fuzhou 350002, Peoples R China

[4] MIT, Dept Nucl Sci & Engn, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[5] Shenzhen Univ, Coll Mech & Control Engn, Addit Mfg Inst, Shenzhen, Peoples R China

来源：

CORROSION SCIENCE | 2022年 / 196卷

基金：

中国国家自然科学基金; 美国能源部;

关键词：

High entropy alloys; LBE; Corrosion; Wetting; Phase transformation; AUSTENITIC STAINLESS-STEELS; LIQUID-METAL EMBRITTLEMENT; LBE; CORROSION; TENSILE; ISSUES; OXYGEN;

D O I：

10.1016/j.corsci.2021.110038

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

After exposure to oxygen-poor (10(-13 )-10(-14) wt%) liquid lead-bismuth eutectic (LBE) at 500 degrees C for 500 h, LBE penetrates more than one order of magnitude deeper in an FCC Al0.4CoCrFeNi high-entropy alloy (HEA) decorated with a network of BCC (Ni, Al)-rich intergranular (IG) precipitates than in a single-phase, FCC Al0.3CoCrFeNi HEA without the IG precipitate network. This deterioration of corrosion resistance is attributed to the energetic nature of the BCC/FCC interphase boundaries (IBs) and resultant IB wetting. The LBE ingress film selectively leaches nickel located at those low-indexed crystalline planes, resulting in phase transformation from FCC to BCC structure.

引用

页数：9

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