【摘要】 将长期与氖氮气体作用后的316L不锈钢容器不断充入氩气介质,直至容器破裂。用扫描电镜和透射电镜对其显微组织进行观察分析。结果表明:破裂断口呈韧致断裂的韧窝形态,通过TEM观察到马氏体组织。通过分析认为,高应变诱发了奥氏体组织中马氏体转变,而氘、氚的存在进一步促进了奥氏体组织中的ε马氏体转变,从而降低了奥氏体不锈钢的层错能,导致其抗氢脆能力下降。更多还原

【Abstract】 The microstructure of 316L austenite stainless steel after charging with deuterium and tritium for 6 years at room temperature is studied. The results indicate that the morphology of fracture surface after blasting is ductile rupture with dimple, stress produced by blasting of high pressure leads to the martensite transformation. The deuterium and tritium improve the ε martensite transformation of austenite and reduce the fault energy,which reduce the hydrogen-resistant properties of 316L stainless steel.更多还原