Slip behavior and its effect on rolling texture development in a dual-phase Mg-Li alloy

Microstructure and texture evolution of Mg-8.8 wt%Li-0.8 wt%Zn dual-phase alloy during cold rolling to 70% thickness reduction were investigated. The results showed that both alpha-fiber and gamma-fiber of beta-Li phase were enhanced during the cold rolling procedure and {001}< 110 > was the dominant texture component. A double-peak texture with a large tilt angle of 28 degrees was observed in alpha-Mg phase. Each peak of this texture component exhibited a wider orientation spread towards the transverse direction. This spread is related to the strong activation of pyramidal II slip. Basal slip was still the dominant slip mode and the activities of pyramidal I and pyramidal II slip were also largely enhanced. Schmid factor analysis and viscoplasitc self-consistent simulation jointly suggests that the development of the rolling texture in alpha-Mg phase can be ascribed to the competition between basal slip and pyramidal slip. (C) 2019 Elsevier B.V. All rights reserved.