Martensitic reorientation and shape-memory effect in initially textured polycrystalline Ti-Ni sheet

T Prakash G. Thamburaja, H. Pan, F. S. Chau

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

In this work we modify the crystal-mechanics-based constitutive model of Thamburaja [J. Mech. Phys. Solids, 53 (2005) 825] for martensitic reorientation in shape-memory alloys to include austenite-martensite phase transformation. Texture effects on martensitic reorientation in a polycrystalline Ti-Ni sheet in the fully martensitic state were investigated by conducting tensile experiments along different directions. By fitting the constitutive model to the stress-strain response for the experiment conducted along the 45° direction the constitutive model is shown to predict the experimental tensile stress-strain response in the rolling and transverse direction to good accord. Shape-memory effect experiments were conducted by raising the temperature of the post-deformed tensile specimens. Austenite-martensite phase transformation material parameters were first determined by fitting the model to a superelastic experiment. With the model calibrated, the experimental shape-memory effect stress-strain-temperature responses were reasonably well predicted by the constitutive model.

Original languageEnglish
Pages (from-to)3821-3831
Number of pages11
JournalActa Materialia
Volume53
Issue number14
DOIs
Publication statusPublished - Aug 2005
Externally publishedYes

Fingerprint

Constitutive models
Shape memory effect
Martensite
Austenite
Phase transitions
Experiments
Tensile stress
Mechanics
Textures
Temperature
Crystals
titanium nickelide
Direction compound

Keywords

  • Constitutive model
  • Finite element analysis
  • Mechanical properties testing
  • Phase transformation
  • Shape-memory alloys

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Science(all)
  • Metals and Alloys

Cite this

Martensitic reorientation and shape-memory effect in initially textured polycrystalline Ti-Ni sheet. / G. Thamburaja, T Prakash; Pan, H.; Chau, F. S.

In: Acta Materialia, Vol. 53, No. 14, 08.2005, p. 3821-3831.

Research output: Contribution to journalArticle

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