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Title: The effect of surface mechanical attrition treatment on texture evolution and mechanical properties of AZ31 magnesium alloy
Authors: Peng, Jinhua
Zhang, Zhen
Guo, Peng
Liu, Zhao
Li, Yaozu
Zhou, Wei
Wu, Yucheng
Keywords: Engineering::Mechanical engineering
Issue Date: 2018
Source: Peng, J., Zhang, Guo, P., Liu, Z., Li, Y., Zhou, W., & Wu, Y. (2019). The effect of surface mechanical attrition treatment on texture evolution and mechanical properties of AZ31 magnesium alloy. Materials Characterization, 148, 26-34. doi:10.1016/j.matchar.2018.11.031
Journal: Materials Characterization
Abstract: AZ31 hot-rolled plates with gradient nano-grained surface were produced by surface mechanical attrition treatment (SMAT). The grain size was refined to nanoscale at the surface layer via twinning and dynamic recrystallization (DRX). The micro-hardness at the top layer had a 132% improvement and the strengthening trend could be divided into three stages. The (0002) basal texture of the base material was weakened during SMAT, indicated by the inclination of (0002) poles, the decrease of maximum pole density and the divergence of contour lines. The inclined impacting direction of steel balls, the spherical shape of the balls and the activation of non-basal slip at the top surface were responsible for the variation. The yield strength was enhanced after SMAT and the increment during tensile test was higher than that during compression due to the different deformation mechanism. Texture weakening had little effect on mechanical properties due to the nano-grains and strong strain hardening at the top surface layer.
ISSN: 1044-5803
DOI: 10.1016/j.matchar.2018.11.031
Schools: School of Mechanical and Aerospace Engineering 
Rights: © 2018 Elsevier Inc. All rights reserved. This paper was published in Materials Characterization and is made available with permission of Elsevier Inc.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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