Non-isothermal transformation-mismatch plasticity: Modeling and experiments on Ti-6Al-4V

C. Schuh*, D. C. Dunand

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

Abstract

Transformation-mismatch plasticity (or transformation superplasticity) is a deformation mechanism occurring in materials undergoing a thermally-induced solid-state phase transformation, while subjected to an external stress. The classic model of this phenomenon, due to Greenwood and Johnson, is limited to the description of strain increments developed after isothermal transformations, as for pure, allotropic metals. In the present work we generalize this model to the case of a non-isothermal transformation, which is applicable to polymorphic alloys displaying a broad range of transformation temperatures. Experiments conducted on Ti-6Al-4V are used to validate the new generalized model, which predicts the strain developed after each thermal cycle, the contributions of the transformations on heating and cooling, and the kinetics of strain evolution during an individual cycle.

Original languageEnglish (US)
Pages (from-to)199-210
Number of pages12
JournalActa Materialia
Volume49
Issue number2
DOIs
StatePublished - Jan 22 2001

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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