The hydrogen embrittlement of pure Ni fabricated by additive manufacturing

被引：16

作者：

He, Jing ^{[1
]}

Liu, Qian ^{[1
]}

He, Minglin ^{[1
]}

Li, Jiaxing ^{[1
]}

Wang, Shuai ^{[1
]}

机构：

[1] Southern Univ Sci & Technol, Dept Mech & Energy Engn, 1088 Xueyuan Blvd, Shenzhen 518055, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2023年 / 48卷 / 44期

基金：

国家重点研发计划;

关键词：

Additive manufacturing; Ni; Hydrogen embrittlement; Intergranular failure; Heat treatment; INTERGRANULAR FAILURE; STEEL; ENVIRONMENT; DECOHESION; PLASTICITY; MECHANISM; DUCTILITY; NICKEL;

D O I：

10.1016/j.ijhydene.2023.01.167

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This work investigated the hydrogen embrittlement mechanism of Ni fabricated by laserbased powder bed fusion (L-PBF). In the presence of hydrogen, the L-PBFed Ni failed with a brittle mode, while its fracture surface had a "transgranular-like" appearance. This unusual fracture morphology is rooted in the special grain shape induced by the laser-based manufacturing process, and the failure process is actually predominated by the intergranular decohesion. An annealing process of the as-printed sample enhanced its elongation and mitigated the hydrogen embrittlement. The special dislocation cellular pattern formed in additive manufacturing is considered to be detrimental to hydrogen embrittlement resistance.(c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：16910 / 16922

页数：13

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