The results showed that strength, ducitlitity and fracture toughness were lowered caused by hydrogen attack for Cr-Mo steel. The fracture mechanism was also changed by hydrogen attack, in which dimple translated to embrittlement.

• 结果表明，氢蚀使Cr－Mo钢强度、塑性和断裂韧性均降低，也使断裂机制由韧窝型转变为解理脆性，氢蚀使疲劳裂纹扩展速率增加，门槛值降低。