Year

2019

Degree Name

Doctor of Philosophy

Department

School of Mechanical, Materials, Mechatronic and Biomedical Engineering

Abstract

This study compares the effect of uniaxial monotonic loading and cyclic loading-unloading in tension on the localised B2 (austenite)>B19'(martensite) phase transformation and mechanical behaviour of a cold-drawn and solution-treated 56Ni-44Ti wt.% shape memory alloy. It also elucidates the grain size effect under these loading conditions. In-situ techniques including digital image correlation (DIC) and synchrotron X-ray diffraction were applied. In addition, the microstructure before and after mechanical testing was studied via optical microscopy, electron back-scattering diffraction and transmission electron microscopy.

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Unless otherwise indicated, the views expressed in this thesis are those of the author and do not necessarily represent the views of the University of Wollongong.