Deciphering the role of solidification cell structure in the hydrogen embrittlement of CoCrFeNi medium-entropy alloy fabricated by laser-powder bed fusion: Insights from annealing treatments

被引：0
|
作者：
Jung, Jae Yeong [1 ]
Jung, Hyun [1 ]
An, Yun Hee [1 ]
Lee, Soo Yeol [1 ]
Zhao, Yakai [2 ]
Lau, Kwang Boon [2 ]
Wang, Pei [2 ]
Lee, Dong-Hyun [1 ]
机构：
[1] Chungnam Natl Univ, Dept Mat Sci & Engn, Daejeon 34134, South Korea
[2] Agcy Sci Tech & Res ASTAR, Inst Mat Res & Engn IMRE, Singapore 138634, Singapore
来源：
CORROSION SCIENCE | 2025年 / 243卷
基金：
新加坡国家研究基金会;
关键词：
Hydrogen embrittlement; Laser-powder bed fusion; High-/medium-entropy alloy; Hydrogen-assisted cracking; Post-process annealing; STAINLESS-STEELS; LOCALIZED PLASTICITY; DISLOCATION NETWORK; TRANSPORT; BEHAVIOR; REFINEMENT; SOLUBILITY; STRENGTH; FRACTURE; METALS;
D O I：
10.1016/j.corsci.2024.112595
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The role of solidification cell structure in hydrogen embrittlement (HE) in laser-powder bed fusion fabricated CoCrFeNi medium-entropy alloy is investigated by comparing as-built and annealed conditions. Annealing at 1100 degrees C dissolves the cell structure and induces partial recrystallization. This slightly reduced the strength but significantly improves HE resistance by suppressing hydrogen-assisted intergranular cracking. The results are discussed in terms of the changes in hydrogen trapping/diffusion behavior and deformation behavior upon removal of cell structure, as investigated through thermal desorption spectroscopy, Ag decoration, and digital image correlation technique.
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页数：11
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