Analysis of Steel Hot Stamping and Magnesium Warm Drawing

Abstract

With the increasing application of hot-stamped parts to automobile bodies and warm-drawn parts of magnesium alloys to electrical devices, simulation has become a basic approach to formability evaluation when designing parts and tools. However, the thermal-mechanical coupling phenomena induced in the hot-stamping process and warm-drawing process are complicated. To accurately simulate these complicated phenomena, a finite-element model for B-pillar hot stamping was created and transient temperature distribution was simulated. The thickness distribution and hardness distribution in a hot stamped B-pillar were predicted. Furthermore, a temperature-dependent anisotropic material model combined with the Hill48 yield function was developed for the simulation of the warm-drawing of magnesium alloys. The predicted results agreed well with experimental ones and simulation accuracy was demonstrated using the newly developed models.

Material Model Development of Magnesium Alloy and Its Strength Evaluation

“…Samuha et al [ 28 ] improved formability for the commercial magnesium AZ80 alloy through the application of the high-rate electromagnetic forming (EMF) technique. Ma et al [ 29 ] developed a temperature-dependent anisotropic material model combined with the Hill48 yield function for the warm-drawing of magnesium alloys. A new extrusion process for Mg–Al–Mn–Ca magnesium alloys using rapidly solidified powders produced very fine grains was also developed by Ma et al [ 30 ].…”