Tests and Finite Element Simulation of Yield Anisotropy and Tension-Compression Strength Difference of an Extruded ZK60 Mg Alloy

Multiroute yield experiments were carried out on extruded ZK60 magnesium alloy samples under 200 °C and strain rate of 10−2 s−1 by a thermomechanical simulator. A hypoelastoplastic large deformation constitutive relationship was employed to simulate subjected uniaxial loading, biaxial loading-reverse orthogonal loading in the finite element (FE) software with user subroutine. The results showed following: (1) As accumulative plastic increased, convex surface 2D stress space gradually expanded or shrank, rotated, distorted from approximate ellipse at low strain. At same strain, tensile compressive values along different directions not same. In addition, value differed considerably one. significant anisotropy, tension-compression strength difference, evolution effect. (2) FE simulations based could accurately capture strongly evolving asymmetric behavior complex routes. stress-strain relationships hardening rates better accordance experimental reflected more realistically compared without effect traditional linear interpolation. Deformation temperature high is important save process costs improve processing efficiency, but it may cause during deformation. It believed that simulation approach used herein reliable for prediction optimization severe processes hexagonal close-packed (HCP) alloys.