Computational and experimental analyses of martensitic transformation propagation in shape memory alloys

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Abstract

This study investigates the creation of heterogeneous martensitic transformation field in shape memory alloy structures with geometrical nonuniformity through experiments and finite element computational analysis. Geometrically graded superelastic NiTi thin plates with series and parallel design configurations with respect to the loading direction have been created. The nonuniform transformation evolutions within these structures are presented by thermal images captured by an infrared camera during tensile experimentation. It is found that the transformation propagation is along the loading direction in a sample with the series design configuration unlike that in a sample with the parallel design configuration. Also, the geometrically graded structures exhibit stress gradient over stress-induced transformation. The transformation propagation and the deformation behaviour of these structures are presented by numerical modelling which is in good agreement with experimental data.
Original languageEnglish
Pages (from-to)1522-1528
JournalJournal of Alloys and Compounds
Volume806
Early online date13 Jun 2019
DOIs
Publication statusPublished - 25 Oct 2019

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Martensitic transformations
Shape memory effect
Cameras
Infrared radiation
Experiments
Direction compound

Cite this

@article{faa55ed9d6124f9782317c023313263e,
title = "Computational and experimental analyses of martensitic transformation propagation in shape memory alloys",
abstract = "This study investigates the creation of heterogeneous martensitic transformation field in shape memory alloy structures with geometrical nonuniformity through experiments and finite element computational analysis. Geometrically graded superelastic NiTi thin plates with series and parallel design configurations with respect to the loading direction have been created. The nonuniform transformation evolutions within these structures are presented by thermal images captured by an infrared camera during tensile experimentation. It is found that the transformation propagation is along the loading direction in a sample with the series design configuration unlike that in a sample with the parallel design configuration. Also, the geometrically graded structures exhibit stress gradient over stress-induced transformation. The transformation propagation and the deformation behaviour of these structures are presented by numerical modelling which is in good agreement with experimental data.",
keywords = "Martensitic transformation, Shape memory alloy (SMA), NiTi alloy, Functionally graded material (FGM)",
author = "{Samsam Shariat}, Bashir and Sam Bakhtiari and Hong Yang and Yinong Liu",
year = "2019",
month = "10",
day = "25",
doi = "10.1016/j.jallcom.2019.06.139",
language = "English",
volume = "806",
pages = "1522--1528",
journal = "Journal of Alloys and Compounds",
issn = "0925-8388",
publisher = "Elsevier Science & Technology",

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T1 - Computational and experimental analyses of martensitic transformation propagation in shape memory alloys

AU - Samsam Shariat, Bashir

AU - Bakhtiari, Sam

AU - Yang, Hong

AU - Liu, Yinong

PY - 2019/10/25

Y1 - 2019/10/25

N2 - This study investigates the creation of heterogeneous martensitic transformation field in shape memory alloy structures with geometrical nonuniformity through experiments and finite element computational analysis. Geometrically graded superelastic NiTi thin plates with series and parallel design configurations with respect to the loading direction have been created. The nonuniform transformation evolutions within these structures are presented by thermal images captured by an infrared camera during tensile experimentation. It is found that the transformation propagation is along the loading direction in a sample with the series design configuration unlike that in a sample with the parallel design configuration. Also, the geometrically graded structures exhibit stress gradient over stress-induced transformation. The transformation propagation and the deformation behaviour of these structures are presented by numerical modelling which is in good agreement with experimental data.

AB - This study investigates the creation of heterogeneous martensitic transformation field in shape memory alloy structures with geometrical nonuniformity through experiments and finite element computational analysis. Geometrically graded superelastic NiTi thin plates with series and parallel design configurations with respect to the loading direction have been created. The nonuniform transformation evolutions within these structures are presented by thermal images captured by an infrared camera during tensile experimentation. It is found that the transformation propagation is along the loading direction in a sample with the series design configuration unlike that in a sample with the parallel design configuration. Also, the geometrically graded structures exhibit stress gradient over stress-induced transformation. The transformation propagation and the deformation behaviour of these structures are presented by numerical modelling which is in good agreement with experimental data.

KW - Martensitic transformation

KW - Shape memory alloy (SMA)

KW - NiTi alloy

KW - Functionally graded material (FGM)

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DO - 10.1016/j.jallcom.2019.06.139

M3 - Article

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EP - 1528

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

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