Friction Stir Welding of Dissimilar Formed Mg Alloys (AZ31/AZ91)
Friction stir welding of dissimilar formed Mg alloys(AZ31/AZ91) was successfully carried out at the limited welding conditions. In a sound joint, SZ was mainly consisted of AZ31 Mg alloy which was located the retreating side. Dynamic recrystallization and grain growth occurred and β intermetallic compounds of AZ 91 Mg alloy was not observed in SZ. BM had a higher hardness than that of the weld zone. The fracture location was not weld zone but BM of the AZ91 Mg alloy in tensile test.
Hyung Sun Kim, Sang-Yeop Park, Bo Young Hur and Soo Wohn Lee
C. Y. Lee et al., "Friction Stir Welding of Dissimilar Formed Mg Alloys (AZ31/AZ91)", Materials Science Forum, Vols. 486-487, pp. 249-252, 2005