| TC6钛合金的高温拉伸蠕变行为研究 |
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| 引用本文： | 李学雄,夏长清,戚延龄,王志辉,牛国帅,孙 玮. TC6钛合金的高温拉伸蠕变行为研究[J]. 稀有金属材料与工程, 2013, 42(9): 1901-1904 |
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| 作者姓名： | 李学雄 夏长清 戚延龄 王志辉 牛国帅 孙 玮 |
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| 作者单位： | 1. 中南大学,湖南长沙,410083
2. 湖南三一重工总部,湖南长沙,410083 |
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| 摘 要： | 通过高温拉伸蠕变实验,获得了TC6合金的蠕变应变-时间曲线,并计算了其不同应力与不同温度下的稳态蠕变速率、应力指数及在350～450℃范围内的蠕变激活能,借助OM、TEM等手段对合金蠕变前后的显微组织进行了观察和分析,并在此基础上研究了其蠕变变形机制.结果表明:TC6合金的稳态蠕变速率随温度或恒应力的增加而增大,该合金在此温度范围内的蠕变受位错和扩散双重机制的控制,晶界滑动对蠕变也有一定的作用.
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| 关 键 词： | TC6 蠕变 显微组织 蠕变机制 |
| 收稿时间： | 2012-09-25 |
Tensile Creep Behavior at High Temperature of TC6 Alloy |
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| Li Xuexiong,Xia Changqing,Qi Yanling,Wang Zhihui,Niu Guoshuai and SunWei. Tensile Creep Behavior at High Temperature of TC6 Alloy[J]. Rare Metal Materials and Engineering, 2013, 42(9): 1901-1904 |
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| Authors: | Li Xuexiong Xia Changqing Qi Yanling Wang Zhihui Niu Guoshuai SunWei |
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| Affiliation: | Central South University, Changsha 410083, China |
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| Abstract: | Through the high temperature tensile creep experiments, the TC6 alloy creep strain-time curves were obtained, and the steady creep rate, the stress exponent and the apparent creep activation energy were calculated in the temperature range of 350~450 oC and different stresses. Microstructures of the alloy before and after creeping were analyzed by OM and TEM. On this basis the creep deformation mechanism was also studied. The results show that the steady creep rate increases with the increase of temperature or stress. The creep behavior of TC6 alloy in the range of 350~450 oC is controlled by double mechanisms of dislocation and diffusion. The boundary slip also has some effects on creeping. |
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| Keywords: | TC6 creep microstructure creep deformation mechanism |
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