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

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2024-11-24 DOI:10.1016/j.corsci.2024.112595

Jae Yeong Jung , Hyun Jung , Yun Hee An , Soo Yeol Lee , Yakai Zhao , Kwang Boon Lau , Pei Wang , Dong-Hyun Lee

引用次数: 0

Abstract

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 °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.

查看原文本刊更多论文

解读凝固晶胞结构在激光粉末床熔融法制造的 CoCrFeNi 中熵合金氢脆中的作用：退火处理的启示

通过比较坯料和退火条件，研究了凝固晶胞结构在激光粉末床熔融制造的 CoCrFeNi 中熵合金氢脆（HE）中的作用。1100 °C 退火会溶解晶胞结构并诱导部分再结晶。这略微降低了强度，但通过抑制氢助晶间裂纹，显著提高了抗高热性能。通过热解吸光谱、Ag 装饰和数字图像相关技术研究了消除晶胞结构后氢捕集/扩散行为和变形行为的变化，并对结果进行了讨论。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Corrosion Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

期刊介绍： Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.