【摘要】 研究了具有等轴、双态和网篮三种组织的TC11合金在520℃下的疲劳—蠕变交互作用特性,发现在断裂过程中出现的解理特征不仅与蠕变空洞形核率有关,而且受拉伸保时过程中裂尖蠕变应变累积和裂尖应力状态的控制,即受临界空洞形核应变和临界空穴扩张比参数V_GC的综合影响。更多还原

【Abstract】 The cleavage rupture behaviour of the TCll Ti alloy with variousmicrostructures, i.e., equiaxed, duplex and interweaving, has been studied under fatigue--creepinteraction at 520℃. It was found to be not only related to the rate of creep void initiating, butalso controlled by the creep strain accumulation on holding under tension test and stress state atcrack--tip. This seem to be combinably affected by both value of critic void initiating strain andparameter, V_GC, of critic void growth.更多还原