Influence of the deformation conditions on the texture evolution in γ-TiAl

被引：32

作者：

Bartels, A ^{[1
]}

Hartig, C ^{[1
]}

Willems, S ^{[1
]}

Uhlenhut, H ^{[1
]}

机构：

[1] Tech Univ Hamburg Harburg, D-21071 Hamburg, Germany

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1997年 / 240卷

关键词：

TiAl; sheets; texture; cube texture; rolling texture; compression texture; mechanical anisotropy; twinning; dynamic recrystallization;

D O I：

10.1016/S0921-5093(97)00556-X

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

After rolling sheets of TiAl a modified cube component occurs in the texture. The c-axes of the tetragonal unit cells are aligned with the transverse direction. A strong mechanical anisotropy is observed which depends on the temperature. The modified cube texture is stable during tensile deformation and gets sharper even under superplastic conditions. Textures measured after compression up to temperatures of 950 degrees C exhibit a shift of the (110) and (101)-fibre components. This is caused by mechanical twinning. At higher temperatures (T > 1100 degrees C) the highly twinned grains preferently recrystallize and a texture component around (302) becomes stable. A bulging mechanism is observed as a special form of the dynamic recrystallization. (C) 1997 Elsevier Science S.A.

引用

页码：14 / 22

页数：9

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