Custom 465 precipitation-hardened stainless steel was subjected to various thermal treatments and then evaluated using tensile testing with a slow strain rate after electrochemical hydrogen charging. The investigation revealed that cryogenically-treated and thermally-aged (593 ℃) specimens exhibited superior resistance to hydrogen embrittlement. Prolonging the aging time reduced the hydrogen susceptibility, which was primarily attributed to the increased stability of reversed austenite caused by the dissolution and transformation of η-Ni₃Ti. Stress concentration relaxation due to the absence or ripening of η-Ni₃Ti further reduced the hydrogen susceptibility. Additionally, hydrogen-induced subcritical cracks initiated on the sample surface governed the fracture behavior.

对定制465沉淀硬化不锈钢进行了各种热处理，然后在电化学加氢后使用具有缓慢应变速率的拉伸试验进行了评估。研究表明，经低温处理和热老化（593℃）的试样对氢脆性表现出优异的抵抗力。延长老化时间减少了氢敏感性，这主要是归因于由溶解和η-Ni系的变换相反的奥氏体的稳定性增加₃的Ti。应力集中缓和由于不存在或η-Ni系的熟化₃的Ti进一步降低氢的易感性。另外，在样品表面上引发的氢诱导的亚临界裂纹控制了断裂行为。