A Study of Plastic Deformation Mechanisms Associated with Twin Variant Selection in Titanium
An interrupted in situ EBSD orientation measurement based on a split sample in channel die compression was proposed and performed in order to provide information on many issues associated with deformation twin, such as the formation and growth of twins, the interaction between variants and so on. With this method, we are able to obtain the timeresolved information on the occurrence of the twin variants, their growth, the interaction between variants and the interaction with the grain boundaries. Two different types of twinning were activated during the deformation: 10-12 tension and 11 - 22 compression twin. The formation and growth of these two types of twin are quite different. 1122 twin shows Multiple Variants System (MVS) , which means it always exhibits three or four variants in one grain. This because the c axes of matrix are close to the compression load, thus the resolved shear stress applied on the six variants are close. In the opposite case ,10-12 twin shows Predominant Variant System (PVS). It only exhibits one variant because the c axes of matrix are nearly perpendicular to the load, only one variant suffers very high resolved shear stress. This predominant variant thus grows fast through almost the whole matrix grain.
Titanium ( Ti) plastic deformation mechanism twinning twin variant selection Schmid factor Multiple Variants System (MVS) Predominant Twin System (PTS)
Lei Bao Jean-Sebastien Lecomte Christophe Schuman Marie-Jeanne Philippe Xiang Zhao Claude Esling
LEM3- UMR CNRS 7239 Universite Paul Verlaine-Metz- (I)le du Saulcy- 57045 METZ Cedex 1,France Key La LEM3- UMR CNRS 7239 Universite Paul Verlaine-Metz- (I)le du Saulcy- 57045 METZ Cedex 1,France Key Lab for Anisotropy and Texture of Materials (Ministry of Education),Northeastern University,Shen
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
767-770
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）