Ti40阻燃钛合金的高温蠕变行为  

High Temperature Creep Behavior of Ti40 Alloys

作　　者：王敏敏[1] 赵永庆[2] 周廉[2] 

机构地区：[1]东北大学,辽宁沈阳110006 [2]西北有色金属研究院,陕西西安710016

出　　处：《稀有金属材料与工程》2003年第2期117-120,共4页Rare Metal Materials and Engineering

摘　　要：计算了Ti40合金在不同应力、不同温度下的稳态蠕变速率、应力指数及在460℃～540℃范围内蠕变激活能Q=94.0kJ/mol,并在此基础上研究了其蠕变强化机制。实验结果表明:该合金在此温度范围内的蠕变受位错和扩散双重机制控制,晶界移动对蠕变也有一定的贡献。在目前实验条件下,Ti40合金在620℃蠕变性能较差。The high temperature creep behavior of Ti40 alloy was studied. The steady creep rate, the stress exponent and the apparent creep activation energy Q, were calculated in the temperature range of 460degreesC similar to 540degreesC and at different stresses. The value of Q is 94.0kJ/mol. On this basis the creep strengthening mechanism was also studied. The creep behavior of Ti40 alloy in the range of 460degreesC similar to 540degreesC is controlled by double mechanisms of dislocation and diffusion. The boundary slip also has some contribution to creep. Its creep property at 620degreesC is not good at present experimental conditions.

关 键 词：TI40阻燃钛合金 稳态蠕变 应力指数 蠕变激活能 稳态蠕变速率 强化机制 

分 类 号：TG146.23[一般工业技术—材料科学与工程] TG111.8[金属学及工艺—金属材料]