Effect of Grain Size on the Performance of Extruded Magnesium Alloy Tubes in Three-Point Bending
The performance of extruded AZ31, AZ61 and AM-EX1 tubes was examined in three-point bending. Different extrusion temperatures were used to investigate the effect of grain size on the load-carrying capacity, energy absorption and fracture propensity of the tubes. Results showed that while the peak load increased with a smaller average recrystallised grain size, the retention of large elongated un-recrystallised grains in the microstructure reduced the load. The presence of the large elongated grains also appeared detrimental to the ability of the tube to deform before fracture.
M.S. Dargusch & S.M. Keay
T. B. Hilditch et al., "Effect of Grain Size on the Performance of Extruded Magnesium Alloy Tubes in Three-Point Bending", Materials Science Forum, Vols. 618-619, pp. 523-526, 2009