Hydrogen Embrittlement of Ni-Based Superalloy Inconel 625 Fabricated by Wire Arc Additive Manufacturing: The Role of Laves Phase
发布时间：2023-11-02点击次数：
- 影响因子：3.3
- DOI码：10.1007/s12540-023-01546-z
- 所属单位：南京工程学院
- 教研室：0
- 发表刊物：Metals and Materials International
- 刊物所在地：韩国
- 项目来源：江苏省自然科学基金，2020年“双创计划”特别人才引进江苏省先进结构材料与应用技术重点实验室开放项目，南京工程学院人才引进研究基金
- 关键字：Hydrogen embrittlement · Wire arc additive manufacturing · Ni-based superalloy · Laves · Crack propagation
- 摘要：The infuence of hydrogen on the mechanical response of Ni-based superalloy Inconel 625 fabricated by wire arc additive manufacturing (WAAM) was investigated via slow strain rate tensile tests at room temperature. The results indicate that the WAAM superalloy just sufered from a slight necking deformation but still reached a high strain value in the presence of hydrogen. H promotes the fracture of the WAAM superalloy from ductile microvoid coalescence change to brittle quasicleavage. The γ-matrix/Laves phase interfaces served as the preferred cracking sites in the alloy. However, the initiation of voids at the interface was not hydrogen-induced, which may be attributed to the strong hydrogen capture ability of the Laves phase, resulting in less hydrogen segregated to the interface. In the formation of voids in the interface at high stress, hydrogen accumulates at the interface through dislocation transport and stress-induced, weakening the interface binding force by hydrogen enrichment. Hydrogen enrichment at the crack tip diminished the stress feld and thus reduced the energy required for crack cracking during cracking propagation.
- 备注：0
- 论文类型：研究论文
- 学科门类：工学
- 卷号：30
- 页面范围：872-885
- ISSN号：2005-4149
- 是否译文：否
- 发表时间：2024-01-01
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- 性别：男
- 职称：副教授
- 学历：研究生
- 学位：博士
- 所在单位：材料科学与工程学院
- 学科： 材料加工工程
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