Influence of different extrusion methods on the microstructure, texture evolution and mechanical property of Tip/AZ31 composite

Abstract

Asymmetric extrusion (AE) deformation has been proved to be an effective way to weak the basal texture of Magnesium (Mg) alloys, improving their mechanical properties. However, the influence of AE process on particle reinforced Mg-matrix composites (MMCs) remains unclear. Thus, in this paper, the effect of different deformation modes (conventional extrusion (CE) and AE) on the microstructure, texture and mechanical properties of 6 wt% Tip/AZ31 composite were comparatively investigated. The results showed that the two extrusion methods induced disparate particle deformation zones (PDZs) effects, which mainly related to the deformation accumulation and the distribution of Ti particle (Tip). The microstructure characterization and finite element analysis (FEA) indicated that the Tip distribution was uneven in the AE process compared with the CE process. In addition, the grain orientation of CE- and AE-processed samples showed a pronounced difference. The discrepancy in texture components was mainly related to the difference in the stress states of matrix and Ti particle status. The current research provides insights into the development of Ti particle reinforced Mg-based composites with great properties and structures.