Measurement of Anisotropic Work-Hardening Properties and Deformation Behavior Analysis of Extruded Magnesium Alloys Using Rapidly Solidified Powders

Abstract

The newly developed extrusion process for Mg-Al-Mn-Ca magnesium alloys using rapidly solidified powders produced very fine grains. The uniaxial tensile and compressive anisotropic stress-strain curves in the extrusion direction and the transverse directions were identified by finite element (FE) analysis based on the measured force-displacement relation. Compared with the cast ingot magnesium alloys, the extruded magnesium alloys have higher strength and weaker anisotropic material properties. Using the identified anisotropic material properties of the extruded magnesium alloys and anisotropic yield function Hill48, the deformation behaviors of magnesium under three-point bending tests and a ball-on-plate indentation test were accurately predicted.