在模拟深海环境中通过电子束熔炼制造的 Ti-6Al-4V 合金的氢脆敏感性

IF 1.1 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Pub Date : 2023-11-30 DOI:10.5006/4280

Yang Zhao, Jidong Wang, Feng Su, Lingyue Hu, Qifan Wu, Wenlong Qi, Tao Zhang, Fuhui Wang

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引用次数: 0

摘要

比较了电子束熔化 Ti-6Al-4V 合金（ET）与传统锻造合金（WT）的氢脆敏感性。在模拟海洋环境下进行了氢渗透、电化学和慢应变速率拉伸（SSRT）试验以及表面观察。结果表明，ET 的氢脆敏感性低于 WT，这可能是由于 ET 的质地较强，晶界比表面积较小，阻止了氢的渗透。此外，随着海洋深度的增加，ET 和 WT TC4 合金的氢脆敏感性都显著增加。抗氢脆性降低的原因可能是钝化膜降解，加速了氢的渗透通量。

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Hydrogen embrittlement susceptibility of Ti-6Al-4V alloys fabricated by electron beam melting in simulated deep-sea environment

The hydrogen embrittlement susceptibility of electron beam melted Ti-6Al-4V alloy (ET) was compared with that of conventional wrought alloy (WT). Hydrogen permeation, electrochemical, and slow strain rate tensile (SSRT) tests as well as surface observation were conducted under a simulated sea environment. The results show that the hydrogen embrittlement susceptibility of ET is lower than that of WT, which can be attributed to the intense texture of ET with a smaller specific surface area of grain boundary, preventing hydrogen permeation. Moreover, with increasing depth of the ocean, the hydrogen embrittlement susceptibility of both ET and WT TC4 alloys increases considerably. This reduced hydrogen embrittlement resistance can be attributed to the degradation of the passivation film, accelerating the permeation flux of hydrogen.

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来源期刊

Corrosion MATERIALS SCIENCE, MULTIDISCIPLINARY-METALLURGY & METALLURGICAL ENGINEERING

CiteScore

2.80

自引率

12.50%

发文量

审稿时长

3 months

期刊介绍： CORROSION is the premier research journal featuring peer-reviewed technical articles from the world’s top researchers and provides a permanent record of progress in the science and technology of corrosion prevention and control. The scope of the journal includes the latest developments in areas of corrosion metallurgy, mechanisms, predictors, cracking (sulfide stress, stress corrosion, hydrogen-induced), passivation, and CO2 corrosion. 70+ years and over 7,100 peer-reviewed articles with advances in corrosion science and engineering have been published in CORROSION. The journal publishes seven article types – original articles, invited critical reviews, technical notes, corrosion communications fast-tracked for rapid publication, special research topic issues, research letters of yearly annual conference student poster sessions, and scientific investigations of field corrosion processes. CORROSION, the Journal of Science and Engineering, serves as an important communication platform for academics, researchers, technical libraries, and universities. Articles considered for CORROSION should have significant permanent value and should accomplish at least one of the following objectives: • Contribute awareness of corrosion phenomena, • Advance understanding of fundamental process, and/or • Further the knowledge of techniques and practices used to reduce corrosion.