The effect of LPSO on the deformation mechanism of Mg–Gd–Y–Zn–Zr magnesium alloy

The tensile deformation behavior and corresponding microstructure evolution of the Mg-4.7Gd-3.4Y-1.2Zn-0.5Zr (at. %) magnesium alloy with long period stacking structure (LPSO) are studied by electron backscatter diffraction (EBSD) and slip lines methods. The results show that less and very small siz...

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Bibliographic Details
Published in:Journal of Magnesium and Alloys
Main Authors: Jianbo Shao, Zhiyong Chen, Tao Chen, Zhang Hu, Xiaojie Zhou, Chuming Liu
Format: Article
Language:English
Published: KeAi Communications Co., Ltd. 2016-06-01
Subjects:
Rare earth magnesium alloys
LPSO
Deformation mechanism
Crystal orientation
Online Access:http://www.sciencedirect.com/science/article/pii/S221395671630010X
Description
Summary:The tensile deformation behavior and corresponding microstructure evolution of the Mg-4.7Gd-3.4Y-1.2Zn-0.5Zr (at. %) magnesium alloy with long period stacking structure (LPSO) are studied by electron backscatter diffraction (EBSD) and slip lines methods. The results show that less and very small size of twins is observed in the grains with high value of Schmid factor for twinning, which indicates that the growth of the {10–12} twinning deformation is prevented by the LPSO phase. The prismatic lines present in grains of which the prismatic slip Schmid factor is above 0.4. The favorable orientation and LPSO phase synergistically promote the activation of prismatic slip. The inhomogeneous rotation of the grains during deformation is the reason for the microcrack at grain boundary.
ISSN:2213-9567

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