Assessing failure mechanisms during transformation superplasticity of Ti-6Al-4V

C. Schuh*, David C Dunand

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

Abstract

During thermal cycling through the α/β phase transformation under the action of a small external biasing stress, Ti alloys exhibit an average deformation stress exponent of unity and achieve superplastic strains. We report tensile experiments on Ti-6Al-4V with an applied stress of 4.5 MPa, aimed at understanding the failure processes during transformation superplasticity. The development of cavities is assessed as a function of superplastic elongation, and macroscopic neck formation is quantified at several levels of elongation by digital imaging techniques. The effects of thermal inhomogeneity on neck initiation and propagation are also elucidated experimentally.

Original languageEnglish (US)
Pages (from-to)55-60
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume601
StatePublished - Dec 3 2000
EventThe 1999 MRS Fall Meeting - Symposium W 'GaN and Related Alloys' - Boston, MA, USA
Duration: Nov 29 1999Dec 1 1999

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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