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Micro‐Mechanical Modelling of the Constitutive Behaviour of NiTi Shape Memory Alloys
Author(s) -
Zhang Wenge,
Hackl Klaus,
Hoppe Ulrich
Publication year - 2004
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.200410117
Subject(s) - shape memory alloy , pseudoelasticity , nickel titanium , materials science , martensite , micromechanics , constitutive equation , crystallite , metallurgy , composite material , microstructure , structural engineering , finite element method , engineering , composite number
The superelasticity and shape memory effect in NiTi alloys are examined on the basis of micromechanics within the energy minimization framework. We describe the behaviour of polycrystalline shape‐memory alloys via orientation‐distribution of the various martensite‐variants (domains) present in the material. Stress‐strain curves are presented and special attention is payed to the volume fraction of martensite for specific NiTi alloys (Nitinol) specimen under uniaxial tension. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)