Deformation behavior of AZ31 magnesium alloy extruded tube under press bending at room temperature

摘要

Press bendability and deformation behavior at room temperature of AZ31 magnesium alloy were studied. AZ31 tube has a good bendability, because it does not tend to occur such undesirable deformations as wrinkling, collapse and cracking. Moreover, flattening of the tube is restricted with the internal mandrel. It became clear from the results of curvature distribution that AZ3l tube is conformed well to punch shape. Bending behavior, strain path and variation of thickness in press bending of AZ31 tube were investigated in addition to the examination of mechanical properties, strain path and variation of thickness in compression. The work-hardening characteristic of compression side of AZ3l tube is greatly different from that of the tension side. Based on the experimental results, we discussed on the deformation behavior and the reason of high buckling limit in bending of AZ31 tube in comparison with various 6063 aluminum alloy tubes.