利用小冲压试验研究暴露于气态氢的 X42 的机械特性:压力、预充电时间、冲压速度和氧气含量的影响

IF 2.9 2区 材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING Acta Metallurgica Sinica-English Letters Pub Date : 2024-08-07 DOI:10.1007/s40195-024-01755-4
Hu-Yue Wang, Hong-Liang Ming, Dong-Ceng Hou, Jian-Qiu Wang, Wei Ke, En-Hou Han
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引用次数: 0

摘要

本研究通过小冲压试验研究了气态氢环境下压力、预充电时间、冲压速度和氧含量对 X42 管线钢机械性能的影响。在氮气环境下,X42 管线钢的断裂模式为韧性断裂,但在氢气环境下,断裂模式转变为脆性断裂。此外,氢气压力的增加或冲压速度的减小会增强 X42 管线钢的氢脆敏感性,这表现在最大载荷、破坏开始时的位移和小冲压能量的减小上。但预充电时间对 X42 管线钢氢脆敏感性的影响并不明显。同时,研究发现氧气的存在能有效抑制氢脆。随着氢中氧含量的增加,X42 管线钢的氢脆敏感性降低。
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Using Small Punch Test to Investigate the Mechanical Properties of X42 Exposed to Gaseous Hydrogen: Effect of Pressure, Pre-charge Time, Punch Velocity and Oxygen Content

This study investigated the effect of pressure, pre-charge time, punch velocity and oxygen content on the mechanical properties of X42 pipeline steel in gaseous hydrogen environment by using small punch test. When exposed to nitrogen, the fracture mode of X42 pipeline steel undergoes ductile fracture, but in the presence of hydrogen, it shifts to brittle fracture. Moreover, an increase in hydrogen pressure or a decrease in punch velocity is found to enhance the hydrogen embrittlement susceptibility of X42 pipeline steel, as evidenced by the decrease of maximal load, displacement at failure onset and small punch energy. But the effect of pre-charge time on the hydrogen embrittlement susceptibility of X42 pipeline steel is not very obvious. Meanwhile, the presence of oxygen has been found to effectively inhibit hydrogen embrittlement. As the oxygen content in hydrogen increases, the hydrogen embrittlement susceptibility of X42 pipeline steel decreases.

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来源期刊
Acta Metallurgica Sinica-English Letters
Acta Metallurgica Sinica-English Letters METALLURGY & METALLURGICAL ENGINEERING-
CiteScore
6.60
自引率
14.30%
发文量
122
审稿时长
2 months
期刊介绍: This international journal presents compact reports of significant, original and timely research reflecting progress in metallurgy, materials science and engineering, including materials physics, physical metallurgy, and process metallurgy.
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