Young's modulus evolution and texture-based elastic-inelastic strain partitioning during large uniaxial deformations of monoclinic nickel-titanium

A. P. Stebner*, D. W. Brown, L. C. Brinson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

Abstract

The authors draw upon recent first-principles calculations of monoclinic NiTi elastic constants to develop a combined numerical-empirical, texture-based approach for calculating the Young's modulus of polycrystalline, monoclinic nickel-titanium specimens. These calculations are carried out for load direction inverse pole figures measured in situ via neutron diffraction during tension-compression deformations to ∼18% true strain, as well as unloading events. As demonstrated by application to this empirical data set, the texture-based approach results in the ability to quantify the evolution of Young's modulus and to micromechanically partition elastic and inelastic macroscopic strains for the entirety of non-linear and asymmetric uniaxial deformations, a result that had not been achieved previously for a monoclinic material.

Original languageEnglish (US)
Pages (from-to)1944-1956
Number of pages13
JournalActa Materialia
Volume61
Issue number6
DOIs
StatePublished - Apr 2013

Keywords

  • Diffraction
  • Monoclinic
  • Nickel-titanium
  • Shape memory alloy
  • Young's modulus

ASJC Scopus subject areas

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

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