【作者】 高振华； 王晶；

【Author】 GAO Zhenhua;WANG Jing;Beijing University of Technology;

【机构】 北京工业大学；

【摘要】 氢能作为理想清洁能源,事关引领产业变革、再生能源的关键。4130X材料作为高压氢气气瓶的主要用钢,在高压氢气的作用下,易发生氢脆,进一步影响材料的力学性能,威胁设备安全。为了解决在役状态下实际工程结构的力学性能评估难题,本文首先基于不同材料的仪器化压痕曲线,确定关联参数,建立氢腐蚀后4130X钢力学性能及本构参数的测定方法。其次,通过仪器化压痕试验,研究了氢腐蚀对4130X钢力学性能及本构参数的影响,获取了不同氢腐蚀条件下4130X材料的关键力学性能及本构关系演化规律。结果显示,氢腐蚀后4130X材料的屈服强度上升11%,抗拉强度无显著变化;硬化系数、硬化指数随氢浓度的升高而显著降低。更多还原

【Abstract】 As an ideal clean energy,hydrogen energy is crucial for leading industrial transformation and supporting renewable energy development.4130 X steel,the primary material used in highpressure hydrogen gas cylinders,is prone to hydrogen embrittlement under the action of high-pressure hydrogen.This further impairs the mechanical properties of the material and endangers the safety of equipment.To address the challenges in evaluating the mechanical performance of in-service engineering structures,this study first establishes a method for determining the mechanical properties and constitutive parameters of hydrogen-corroded 4130 X steel based on instrumented indentation method by identifying correlation parameters of instrumented indentation curves.Secondly,instrumented indentation tests were conducted to investigate the effects of hydrogen corrosion on the mechanical properties and constitutive parameters of 4130 X steel,and the change law of the key mechanical properties and constitutive relationship of 4130 X steel under different hydrogen corrosion conditions were obtained.The results show that the yield strength of 4130 X increases by 11% after hydrogen corrosion,and the tensile strength has no significant change.The hardening coefficient and hardening exponent decrease significantly with the increase of hydrogen concentration.更多还原