压力容器2024，Vol.41Issue(12)：8-15,8.DOI:10.3969/j.issn.1001-4837.2024.12.002
高压氢环境下储氢容器4130X钢力学性能的演化规律研究
Mechanical property evolution of 4130X steel in high pressure hydrogen environment for hydrogen storage vessel
摘要
Abstract
In order to investigate the hydrogen embrittlement behavior of 4130X steel under different hydrogen pressures,smooth tensile rate tests(SSRT)in atmosphere as well as in hydrogen environments at 5,20 and 100 MPa were performed.The evolution of mechanical properties and fracture morphology in hydrogen environments was analyzed.The results indicate that as the hydrogen pressure increases 0～100 MPa,the strength of 4130X steel remains relatively unchanged,while its plasticity decreases.With increasing hydrogen pressure,the fracture mechanism transitions from microvoid coalescence to a mixture of quasi-cleavage and microvoid coalescence,eventually becoming quasi-cleavage,which can be explained by the hydrogen-enhanced localized plasticity(HELP)+hydrogen-enhanced decohesion(HEDE)mechanism.In hydrogen environments,the fracture of specimens originates from hydrogen-induced cracks formed on the specimen surface during the necking stage.At stress levels corresponding to elastic deformation and uniform plastic deformation,hydrogen has no significant effect on the mechanical properties of 4130X steel.The research results can provide reference for the application of CrMo steel in hydrogen storage vessels.关键词
高压氢环境/4130X钢/力学性能/慢应变率拉伸/氢脆Key words
high pressure hydrogen environment/4130X steel/mechanical property/slow strain rate tensile/hydrogen embrittlement分类
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黄淞,薛广珂,惠虎,陈泽鸿,茹祥坤,盛旭婷,季龙华,丁阳..高压氢环境下储氢容器4130X钢力学性能的演化规律研究[J].压力容器,2024,41(12):8-15,8.基金项目
国家自然科学基金资助项目(52375143) （52375143）
上海市"科技创新行动计划"科技支撑碳达峰碳中和专项项目(22DZ1206300) （22DZ1206300）
