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Title: Martensitic reorientation and shape-memory effect in initially textured polycrystalline Ti-Ni sheet
Authors: Thamburaja, P. 
Pan, H.
Chau, F.S. 
Keywords: Constitutive model
Finite element analysis
Mechanical properties testing
Phase transformation
Shape-memory alloys
Issue Date: Aug-2005
Citation: Thamburaja, P., Pan, H., Chau, F.S. (2005-08). Martensitic reorientation and shape-memory effect in initially textured polycrystalline Ti-Ni sheet. Acta Materialia 53 (14) : 3821-3831. ScholarBank@NUS Repository.
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. © 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Source Title: Acta Materialia
ISSN: 13596454
DOI: 10.1016/j.actamat.2005.03.054
Appears in Collections:Staff Publications

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