Dependency of deformation twinning on grain orientation in an FCC and a HCP metal

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  • School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;

Published date: 05 Dec 2007

Abstract

Twinning plays important roles in HCP metals and those FCC metals with low stacking fault energy. The structural difference of two types of metals makes quite different contributions of twinning to plasticity. The variety of grain orientation in polycrystalline metals causes the inhomogeneous occurrence of twinning and further distinct transformation kinetics of twinning as strain increases and texture develops. This changes finally the work hardening behavior and mechanical properties. This paper reveals the dependency of twinning on grain orientation in an FCC TWIP (twinning induced plasticity) steel with high Mn content and in a magnesium alloy using electron-backscatter-diffraction (EBSD) technique, and analyzes the characteristics of twinning in the two types of metals by Schmid factor calculation. In addition, the relation of twinning and shear banding, as well as their influence on properties are discussed.

Cite this article

YANG Ping . Dependency of deformation twinning on grain orientation in an FCC and a HCP metal[J]. Frontiers of Materials Science, 2007 , 1(4) : 331 -341 . DOI: 10.1007/s11706-007-0062-5

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