FINITE ELEMENT ANALYSES OF MAGNESIUM AZ80 WROUGHT ALLOY ANISOTROPIC BEHAVIOUR DURING WARM FORGING

Abstract

This paper deals with the FEM simulations of anisotropic flow during bulk forming (forging) of magnesium AZ80 wrought alloy at warm conditions. Anisotropic characteristics are described by the classical formulation of Hill’s (1948) quadratic anisotropic yield law. To define reliable FEM models capable of carrying out numerical simulations of complex bulk forming operations in a reasonable amount of computing time, a simplified approach for determining Hill’s anisotropic coefficients as constants is proposed. On the basis of the determined Hill’s anisotropic coefficients and the mechanical properties, the results of an extensive FEM study of lab-scale and industrial-scale forging are shown. FEM results are also compared to the actual obtained results. It is shown that the approach presented can be successfully used in industrial practice.

DOI: http://dx.doi.org/10.5755/j01.mech.18.3.1876