Cross-profile deep drawing of magnesium alloy AZ31 sheet metal for springback analysis under various temperatures

Abstract

Abstract In times of electro mobility and increasing resource-saving, lightweight design and size accuracy are in a progressive rate important. Therefore, conventional sheet metal materials are substituted by lighter material systems, for example magnesium alloys. In case of magnesium alloys, a deep drawing process can only be realized at elevated temperatures due to the hexagonal lattice structure. Moreover, springback of the deep drawn part leads to a decrease in size accuracy. Especially in deep drawing processes at elevated temperatures with temperature-dependent material properties, the springback behavior needs to be analyzed. In this paper, a deep drawing process of a cross-profile is realized to analyze the springback behavior of a magnesium alloy AZ31 at various forming temperatures. Besides, an advantage of the cross-profile deep drawing process is a simultaneous determination of springback in 0 and 90 degree to the rolling direction of the sheet metal. Furthermore, the dependency on the rolling direction can be investigated for the same profile without the influence of a change of the forming condition. Within this examination, the geometry of the deep drawn profile is digitized and the springback behavior is examined by the springback angles depending on the rolling direction and the forming temperature.