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Title: Martensitic Phase Transformations in CuAlNi Shape Memory Alloys
Authors: Babacan, Nazım
Günel, I
Özsoy, İstemi Barış
Keywords: Single crystal
CuAlNi alloy
Martensitic phase transformations
Shape memory alloys
Issue Date: 2012
Publisher: Trans Tech Publications Ltd
Source: 14th International Conference on Advances in Materials and Processing Technologies (AMPT) -- JUL 13-16, 2011 -- Istanbul, TURKEY
Series/Report no.: Advanced Materials Research
Abstract: The main deformation mechanism of shape memory alloys (SMA) is martensitic phase transformation (PT). To model martensitic phase transformations in such materials, several models have been developed. In the micromechanical model developed by Levitas and Ozsoy (2009), complete system of equations that describes evolution of stresses in phases and crystallographic parameters, as well as macroscopic stress strain response for martensitic phase transformations under complex multiaxial loadings have been formulated. However, the experimental verification is incomplete. The objective of this study is to compare the experimental results in the literature for CuAlNi SMA with the results obtained from this micromechanical model. In the experiment used for comparison (Shield, 1995), a single crystal CuAlNi specimen is subjected to uniaxial load in several directions at different temperatures. According to the results obtained by using the constitutive equations of the model, the model describes the stress induced phase transformations very well when compared with these experiments. The uniaxial loading-unloading hysteresis loop shows good agreement with the experiments.
ISBN: 978-3-03785-346-7
ISSN: 1022-6680
Appears in Collections:Makine Mühendisliği Bölümü / Department of Mechanical Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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