Relationship among Initial Texture, Deformation Mechanism, Mechanical Properties, and Texture Evolution during Uniaxial Compression of AZ31 Magnesium Alloy

Abstract

Cuboid samples with significant initial texture differences were cut from extruded AZ31 Mg alloy samples, whose long axis and bar extrusion direction ED were 0° (sample E0), 45° (sample E45), and 90° (sample E90). The relationship among the initial texture, deformation mechanism, mechanical properties, and texture evolution of the AZ31 Mg alloy was investigated systematically using a compression test, microstructure characterization, and the Viscoplastic Self-Consistent (VPSC) model. Results revealed a close relationship among them. By influencing the activation of the deformation mechanism, the deformation under different initial textures resulted in obvious mechanical anisotropy. Compared with E0 and E90, the initial texture of E45 was more conducive to the improvement of reforming ability after pre-compression. Meanwhile, the initial texture significantly affected the microstructure characteristics of the material, especially the number and morphology of the {10–12} tensile twins. Texture results showed that the priority of deformation mechanism depended on the initial texture and led to the difference in texture evolution.

Hot Rolling of ZK60 Magnesium Alloy with Isotropic Tensile Properties from Tubing Made by Shear Assisted Processing and Extrusion (ShAPE)

“…ZK60 has a moderate cost and favorable ratio of compressive to tensile strength (compared to RE Mg alloys) [31]. SPD techniques such as Equal Channel Angular Pressing (ECAP), Accumulative Roll Bonding (ARB) and Cyclic Extrusion and Compression (CEC) have been employed on ZK60 and other Mg alloys to refine grain size (to the range of 0.6-6 µm) and increase strength while also maintaining favorable ductility [32][33][34][35][36][37][38][39]. Previous work by the current authors employed ShAPE to form ZK60 tubes with average grain size less than 5 µm and to obtain a texture with basal planes oriented 20-45 • to the extrusion axis.…”

Processing and Characterization of Magnesium-Based Materials

“…The effect of the initial texture on the deformation behavior of AZ31 was investigated by Su et al [7] with EBSD and visco-plastic self-consistent (VPSC) modeling. The study shows how the initial texture plays a major role in the texture evolution during mechanical loading, leading to mechanical anisotropy.…”