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

Release time:2021-10-21

DOI number:10.1016/j.jma.2016.03.001

Journal:Journal of Magnesium and Alloys

Key Words:Rare earth magnesium alloys; LPSO; Deformation mechanism; Crystal orientation

Abstract: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.

Co-author:Z.Y. Chen*, T. Chen, Z. Hu, X.J. Zhou, C.M. Liu

First Author:J.B. Shao

Indexed by:Journal paper

Discipline:Engineering

First-Level Discipline:Materials Science and Engineering

Document Type:J

Volume:4

Issue:2

Page Number:83-88

ISSN No.:2213-9567

Translation or Not:no

Date of Publication:2016-04-20

Included Journals:SCI