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Abstract
This study reports experimental evaluation of inhomogeneous strain fields created in NiTi structures during stress-induced martensitic transformation. A superelastic NiTi thin plate was used to create samples with uniform and non-uniform geometries. Digital image correlation technique was employed to measure the local strain variation in the NiTi samples under mechanical loading. Clear Lüders band formation and propagation were observed during experiments. The local strain contours revealed that the deformation was localised and spatially inhomogeneous in all samples. In the geometrically non-uniform sample, the transformation initiation and propagation were controlled by geometrical gradient. Also, the global deformation behaviour exhibited stress-gradient during forward and reverse transformations because of geometrical non-uniformity.
Original language | English |
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Article number | 012006 |
Number of pages | 5 |
Journal | IOP Conference Series: Materials Science and Engineering |
Volume | 831 |
Issue number | 1 |
DOIs | |
Publication status | Published - 5 Jun 2020 |
Event | 7th International Conference on Mechanical, Automotive and Materials Engineering - Melbourne, Australia Duration: 8 Dec 2019 → 10 Dec 2019 Conference number: 7 |
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Dive into the research topics of 'Experimental investigation of heterogeneous strain fields created in metallic materials'. Together they form a unique fingerprint.Projects
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Exceptional properties by design - NiTi vision
Samsam Shariat, B. (Investigator 01)
ARC Australian Research Council
1/01/15 → 30/09/20
Project: Research