Enhanced ductility and strength of Mg-1Zn-1Sn-0.3Y-0.2Ca alloy achieved by novel micro-texture design

Texture weakening is generally adopted as one of the prominent methods to improve the ductility of Mg alloys. In this work, we designed and fabricated the Mg-1Zn-1Sn-0.3Y-0.2Ca (wt. % ZTWX1100) alloy with a novel basal-random heterogeneous (BRH) texture by precisely controlled high-reduction rolling, which contained both basal-and random-oriented grains with a uniform distribution. Compared with the basal-texture sample, the BRH texture improved the ductility and tensile strength simultaneously, due to the operation of non-basal slips within basal-oriented grains and the strong work hardening ability contributed by the basal-random grain boundaries. Besides, the basal-random grain boundaries in BRH texture were beneficial to improve the deformation compatibility by transforming the dominant carrier of local stress from original random-oriented grains to basal-oriented ones. This work aims to provide new insight into improving the mechanical properties of Mg alloys by texture coordinated deformation. (c) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Automated summary

In this study, a novel Mg alloy with a basal-random heterogeneous (BRH) texture was designed and fabricated through high-reduction rolling. Compared to the basal-texture sample, the BRH texture improved both ductility and tensile strength simultaneously, providing new insight into enhancing the mechanical properties of Mg alloys through texture coordinated deformation.