Transverse Superplastic Deformation of Laser Welded Ti-6Al-4V Sheet
Uni-axial hot tensile tests were used to investigate the transverse superplastic deformation of laser welded Ti-6Al-4V sheet. Microstructures of the weld bead before and after superplastic deformation were observed by optical microscope. The maximal deformation of 46% was obtained on weld joint at strain rate of 10−2s−1 and temperature of 1173K. A coefficient K was introduced to evaluate the non-uniform deformation of weld joint. After superplastic deformation the microstructure of weld bead transformed into lamellas from original acicular structure.
Yungang Li, Pengcheng Wang, Liqun Ai, Xiaoming Sang and Jinglong Bu
D. H. Cheng et al., "Transverse Superplastic Deformation of Laser Welded Ti-6Al-4V Sheet", Advanced Materials Research, Vols. 291-294, pp. 1440-1443, 2011