Improved formability of magnesium alloy by repeated roll bending process

(Part.3:Influence of asymmetric roll bending on microstructure evolution)

Abstract

In order to elucidate the mechanism of Improvement of cold formability by a continuous repetitive asymmetric roll bending by different roll diameter and low temperature annealing , changes in crystal orientation were investigated by EBSD analysis. As the continuous asymmetric bending process we can weaken the bottom texture of {0001} and randomize it in the RD direction, and twinning deformation can be expressed more frequently even at the central part of plate thickness, By 160°C annealing, it was possible to improve the formability while maintaining the plate thickness center hardness of as-received.