Effect of hydrogen on γ-phase transformation and texture evolution of a TiAl - based alloy deformed at elevated temperature

被引：8
作者：
Wen, Daosheng [1 ,2 ]
Huang, Shuhui [3 ]
Guo, Bin [1 ,2 ]
Shan, Debin [1 ,2 ]
Zong, Yingying [1 ,2 ]
机构：
[1] Harbin Inst Technol, State Key Lab Adv Welding Prod Technol, Harbin 150001, Peoples R China
[2] Harbin Inst Technol, Natl Key Lab Precis Hot Proc Met, Harbin 150001, Peoples R China
[3] Gen Res Inst Nonferrous Met Beijing, Stare Key Lab Nonferrous Met & Proc, Beijing 100088, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2017年 / 699卷
基金：
中国国家自然科学基金;
关键词：
TiAl - based alloy; Hydrogen; Phase transformation; Texture; Sigma 3(n) twinning boundaries; TITANIUM ALUMINIDE ALLOY; MECHANICAL-PROPERTIES; MICROSTRUCTURAL EVOLUTION; DEFORMATION-BEHAVIOR; TI-6AL-4V ALLOY; BETA; DESIGN; CAST;
D O I：
10.1016/j.msea.2017.04.092
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effect of hydrogen on gamma-phase transformation and texture evolution of a Ti-46A1-2V-1Cr-0.3Ni (in at%) alloy was investigated during deformed in the temperature range of 1100-1200 degrees C with a strain rate of 0.01 s(-1). Both the gamma ->alpha(2) and alpha(2)->gamma(lamella) transformations occurred in the hydrogenated alloy, and the former was predominant, when it is deformed at 1150 degrees C/0.01 s(-1). gamma ->alpha(2) transformation occurred earlier than alpha(2)->gamma(lamella). Hydrogen induced such transformation was mainly associated with hydrogen-promoted dislocation movement and hydrogen-decreased stacking faults energy. A sharp < 111 > - fiber texture was observed in the unhydrogenated alloy. That was significantly weakened in the hydrogenated alloy because of hydrogen- promoted lamellar decomposition and dynamic recrystallization. < 110 > - and < 320 > - fiber textures mainly associated with Sigma 3 and Sigma 27a which were increased by hydrogen can be only observed in the hydrogenated alloy. With increasing temperature, < 110 > - and < 320 > - fiber textures of the hydrogenated alloy was enhanced.
引用
收藏
页码：176 / 184
页数：9
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