Effect of Hydrogenation on Microstructure of TC21 Alloy

被引：0
|
作者：
Zhang Xuemin [1 ]
Zhao Yongqing [2 ]
Zeng Weidong
机构：
[1] NW Polytech Univ, Sch Mat Sci & Engn, Xian 710072, Peoples R China
[2] NW Inst Nonferrous Met Res, Xian 710016, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2009年 / 38卷 / 12期
关键词：
titanium alloys; hydrogenation; hydride; eutectoid transformation; TITANIUM-ALLOYS; MECHANISM; HYDRIDE;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Microstructure evolution of biphase TC21 alloy before and after hydrogenation as well as dehydrogenation was investigated by XRD, OM and TEM. The results show that the amount of beta phase increases gradually as the hydrogen content increases; fcc delta hydrides appear when the hydrogen content reaches above 0.319%. Hydrides mainly precipitate by eutectoid transformation through diffusion during the cooling process after high-temperature hydrogenation. Because of the lattice distortion caused by eutectoid transformation, recrystallization occurs after the dehydrogenation, so the grains are refined and become much more homogenous.
引用
收藏
页码：2179 / 2182
页数：4
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