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 vessels

作　　者：黄淞 薛广珂 惠虎[1,4] 陈泽鸿 茹祥坤 盛旭婷 季龙华 丁阳 HUANG Song;XUE Guangke;HUI Hu;CHEN Zehong;RU Xiangkun;SHENG Xuting;JI Longhua;DING Yang(School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China;Shanghai Electric Nuclear Power Group Co.,Ltd.,Shanghai 201306,China;Shanghai Electric Nuclear Power Equipment Co.,Ltd.,Shanghai 201306,China;4H Hydrogenation Material Laboratory,Shanghai 201306,China)

机构地区：[1]华东理工大学机械与动力工程学院,上海200237 [2]上海电气核电集团有限公司,上海201306 [3]上海电气核电设备有限公司,上海201306 [4]4H临氢材料实验室,上海201306

出　　处：《压力容器》2024年第12期8-15,共8页Pressure Vessel Technology

基　　金：国家自然科学基金资助项目(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)。

摘　　要：为了探究不同氢气压力下储氢容器用4130X钢氢损伤行为的差异,进行大气环境以及5,20,100 MPa氢环境下的拉伸试验,对氢环境中力学性能和断口形貌演化规律进行分析,结果表明,氢环境压力0~100 MPa,4130X钢的强度变化不大,塑性随氢压升高而下降;随着氢气压力的增大,断裂机理由微孔洞聚合先转变为准解理+微孔洞聚合,最终完全变为准解理,其氢脆机理可用氢致局部化塑性(HELP)+氢致弱键(HEDE)机理解释;氢环境下试样断裂均源于由试样表面在颈缩阶段形成的氢脆裂纹,在弹性变形和均匀塑性变形的应力水平下,氢对4130X钢的力学性能无明显影响。该研究结果可为CrMo钢在储氢容器中的应用提供参考。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 

分 类 号：TH49[机械工程—机械制造及自动化] TK91[动力工程及工程热物理] TG113.25[金属学及工艺—物理冶金]