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TC6钛合金的高温拉伸蠕变行为研究

RARE METAL MATERIALS AND ENGINEERING(2013)

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Abstract
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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Key words
TC6,creep,microstructure,creep deformation mechanism
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