A model of phase transition from austenite to martensite in single-crystal NiMnGa alloys

Y. M. Pei, D. N. Fang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A model is presented for the description of shape memory effect due to the thermoelastic martensite transformation induced by temperature, stress and magnetic field in ferromagnetic NiMnGa alloys. A cosine model on the basis of thermodynamic principle is developed to describe the structural distortion of the lattice in the complex coupled field. The magnetic-field-induced stress is introduced and the equivalence principal is employed for the mechanical and magnetoelastic deformation to represent the reorientation of the martensitic variants. The comparison between the theoretical and experimental results shows that the theory provides a good quantitative description of the material peculiar behavior.

Original languageEnglish
Title of host publicationAdvances in Heterogeneous Material Mechanics 2008 - 2nd International Conference on Heterogeneous Material Mechanics, ICHMM 2008
Pages691-695
Number of pages5
Publication statusPublished - 2008
Externally publishedYes
EventAdvances in Heterogeneous Material Mechanics 2008 - 2nd International Conference on Heterogeneous Material Mechanics, ICHMM 2008 - Huangshan, China
Duration: 3 Jun 20088 Jun 2008

Publication series

NameAdvances in Heterogeneous Material Mechanics 2008 - Proceedings of the 2nd International Conference on Heterogeneous Material Mechanics, ICHMM 2008

Conference

ConferenceAdvances in Heterogeneous Material Mechanics 2008 - 2nd International Conference on Heterogeneous Material Mechanics, ICHMM 2008
Country/TerritoryChina
CityHuangshan
Period3/06/088/06/08

Keywords

  • Ferromagnetic Shape memory effect
  • Lattice deformation
  • Phase transition
  • Self-accommodation

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