SOLIDIFICATION BEHAVIOR AND MICROSTRUCTURE EVOLUTION OF Si BEARING TiAl ALLOY

被引：0
|
作者：
Fu Sheng Sun
机构：
来源：
Transactions of Nonferrous Metals Society of China | 1999年 / S1期
关键词：
TiAl alloys Si addition solidification behavior microstructure evolution;
D O I：
暂无
中图分类号：
TG146.23 [];
学科分类号：
摘要：
The solidification behavior of Ti 52 Al 48 x Si ( x =0, 0 5, 1 0, 2 0, 3 0, 6 0, mole fraction, %) alloys prepared by ingot metallurgy, has been studied with differential thermal analysis (DTA) and microstructure examination. Two kinds of Ti 5Si 3 phase were found in Ti 52 Al 48 x Si ( x =0 5, 1 0, 2 0) alloys. The first one was formed during L →Ti 5Si 3+ L 1, and the second one was characteristic of whiskers in eutectic morphology formed during L 2→α+Ti 5Si 3. The third kind of Ti 5Si 3 phase was formed in Ti 52 Al 48 3Si alloy by a eutectoid reaction of α→γ +Ti 5Si 3. With addition of Si up to 6 0 %, the solidification path was completely different from the other alloys.
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页码：197 / 201
页数：5
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