Optimum forming loading paths for Pb-Sn superplastic sheet materials Academic Article uri icon

abstract

  • The bulge forming performance of Pb-Sn superplastic sheet materials is evaluated under different forming pressure-time profiles. In addition, an optimum pressure-time profile based on variable strain rates is proposed. Results of forming time, achieved amount of deformation, and thinning behavior are reported for the different forming pressure profiles. Not only the forming time was significantly reduced, when forming with the optimum pressure profile, but the integrity of the formed part was also maintained. Furthermore, the results show that forming profiles based on uniaxial models cannot successfully predict the actual forming behavior when the loading path is biaxial. In fact, the one-dimensional strain rate hardening relation, along with von Mises criterion, predict failure at a much higher strain (time) than the actual case.

published proceedings

  • JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME

author list (cited authors)

  • Khraisheh, M. K., & Zbib, H. M.

citation count

  • 18

complete list of authors

  • Khraisheh, MK||Zbib, HM

publication date

  • July 1999