Effect of 0.2%H on the O Phase Transformation and Recrystallization of B2 Phase of the Ti-22Al-25Nb Alloy

被引：0

作者：

Shao Bin ^{[1
]}

Shan Debin ^{[1
]}

Guo Bin ^{[1
]}

Zong Yingying ^{[1
]}

机构：

[1] Harbin Inst Technol, Harbin 150001, Heilongjiang, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2019年 / 48卷 / 04期

关键词：

Ti-22Al-25Nb alloy; hydrogen-induced phase transition; grain refinement; O phase; HYDROGEN ABSORPTION; BEHAVIOR;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The Hydrogen was added into Ti-22Al-25Nb alloy, and the effects of H on the O phase transformation and recrystallization of B2 phase were investigated. The results show that the phase transformation process accelerates and the phase transformation point declines during the hot treatment process of the Ti-22Al-25Nb alloy after a 0.2% (mass fraction) hydrogen addition. Hydrogen facilitates the recrystallization process and the grain size refines from 135 mu m to 60 mu m at 960 degrees C. Hydrogen facilitates the decomposition of strengthening phase O phase into B2 phase and the transformation of the alpha(2) phase from granular shape to strip shape during the temperature increasing process. Hydrogen promotes the preferential segregation and fast growth of the O phase at grain boundaries and accelerates the transformation process of B2 -> O phase during the 750 degrees C heat preservation process.

引用

页码：1174 / 1178

页数：5

共 24 条

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