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Erschienen in:
2016 | OriginalPaper | Buchkapitel
Microstructure and mechanical properties of dissimilar friction stir welds using AA6061-T6 and AZ31 plates
verfasst von : Kwang-Jin Lee, Sang-Hyuk Kim, Hyeon-Taek Son, Kee-Do Woo
Erschienen in: ICAA13 Pittsburgh
Verlag: Springer International Publishing
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This study was performed to investigate microstructure and mechanical properties of dissimilar friction stir welds using AA6061-T6 and AZ31 plates. Tensile strengths of AA6061-T6 and AZ31 plates were 314MPa and 242MPa, respectively. Tensile strengths of the joints by condition I and condition II were 182MPa and 219MPa, respectively. These are about 75%, 90% of AZ31 tensile strength. During tensile test, fracture was occurred at the weld region. Impact absorption energy of the joint by condition II was about 2 times compared to that of AZ31 base metal. Crack propagation energy dramatically increased at the weld region. This may be due to both grain refinement and homogeneous dispersion of particle by strong plastic deformation.