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

被引：17
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.
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页数：9
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