I 相的形成对 Mg-8 wt%Li 基铸件合金氢脆行为的影响

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

Corrosion Science Pub Date : 2024-09-19 DOI:10.1016/j.corsci.2024.112467

Shuo Wang , Daokui Xu , Baojie Wang , Zhiqiang Zhang , Xiangbo Xu , Dongliang Wang , Xin Lv

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引用次数: 0

摘要

通过进行微观结构表征、拉伸测试和失效分析，研究并比较了电化学氢充电对两种铸态 Mg-8Li（重量百分比）基合金的微观结构和机械性能的影响。由于在原位形成了 I 相，在氢充电 24 小时后，Mg-8Li-6Zn-1Y 合金的失效伸长率为 31.2%，氢脆（HE）敏感性约为 Mg-8Li 合金的 1/4。此外，由于 I 相优先吸收氢，氢诱导孔隙的优先位置从两个基体相转移到了 I 相/基体共晶袋，从而导致 Mg-8Li-6Zn-1Y 合金具有更高的抗氢脆性。

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Effect of I-phase formation on hydrogen embrittlement behaviour of as-cast Mg-8 wt%Li based alloys

By performing microstructural characterization, tensile testing and failure analysis, the effects of electrochemical H-charging on microstructure and mechanical behaviour of two as-cast Mg-8Li (in wt%) based alloys were investigated and compared. Due to the in-situ formation of I-phase, the failure elongation ratio for Mg-8Li-6Zn-1Y alloy was 31.2 % and its hydrogen embrittlement (HE) susceptibility was about 1/4 that of Mg-8Li alloy after H-charging for 24 h. Moreover, the preferential location of H-induced pores transferred from two matrix phases to I-phase/matrix eutectic pockets due to the preferential H absorption of I-phase, resulting in the higher HE resistance of Mg-8Li-6Zn-1Y alloy.

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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.