对时效状态不同的TC4合金在77～623K间进行了热循环试验,测定了热循环前后的拉伸性能结果表明:热循环1000次后,近峰时效态合金的强度下降,过时效态合金的强度变化最小,而塑性均显著下降.合金中的位错密度、层错和形变李晶的数量增多.在热循环过程中α格内激活的位错以型为主,激活的李晶以｛1011｝型为主.
The thermal cycling tests between 77 and 623K were performed on the aged Ti-6Al-4V alloy and the tensile properties before and after thermal cycling were evaluated. The results show that the strength of the near-peak-aged alloy decreases and that of the o
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