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Effect of thermal cycling on the thermomechanical behaviour of NiTi shape memory alloys

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Title: Effect of thermal cycling on the thermomechanical behaviour of NiTi shape memory alloys
Authors: Urbina, C. cristina.urbina@urv.cat, De la Flor, S.1, Ferrando, F.1
Source: Materials Science & Engineering: A. Feb2009, Vol. 501 Issue 1/2, p197-206. 10p.
Subjects: Shape memory alloys, Nickel-titanium alloys, Thermomechanical properties of metals, Phase transitions, Phase diagrams, Materials science
Abstract: Abstract: This paper analyses the influence of thermal cycling at zero stress on the thermomechanical response of NiTi shape memory alloy (SMA) wire in the martensitic, R-phase and austenitic transformation ranges. An in depth study compares the mechanical properties of a sample thermally cycled at zero stress and a sample without thermal or mechanical cycling. The critical stress–temperature diagram for each sample is presented taking into account the R-phase transformation zone. The results show that thermal cycling has considerable impact on the transformation behaviour of the alloy and on the mechanical properties of the R-phase: the values of the apparent modulus and the critical transformation stresses are higher. The parameters that describe the SMA macromechanical behaviour, then, undergo a considerable change due to thermal cycling, suggesting that if an SMA has to be used throughout the R-phase range, the material should be thermally cycled to obtain better mechanical properties. [Copyright &y& Elsevier]
Copyright of Materials Science & Engineering: A is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 35769836
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
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  Data: Effect of thermal cycling on the thermomechanical behaviour of NiTi shape memory alloys
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  Data: <searchLink fieldCode="AR" term="%22Urbina%2C+C%2E%22">Urbina, C.</searchLink><i> cristina.urbina@urv.cat</i><br /><searchLink fieldCode="AR" term="%22De+la+Flor%2C+S%2E%22">De la Flor, S.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Ferrando%2C+F%2E%22">Ferrando, F.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Materials+Science+%26+Engineering%3A+A%22">Materials Science & Engineering: A</searchLink>. Feb2009, Vol. 501 Issue 1/2, p197-206. 10p.
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  Data: <searchLink fieldCode="DE" term="%22Shape+memory+alloys%22">Shape memory alloys</searchLink><br /><searchLink fieldCode="DE" term="%22Nickel-titanium+alloys%22">Nickel-titanium alloys</searchLink><br /><searchLink fieldCode="DE" term="%22Thermomechanical+properties+of+metals%22">Thermomechanical properties of metals</searchLink><br /><searchLink fieldCode="DE" term="%22Phase+transitions%22">Phase transitions</searchLink><br /><searchLink fieldCode="DE" term="%22Phase+diagrams%22">Phase diagrams</searchLink><br /><searchLink fieldCode="DE" term="%22Materials+science%22">Materials science</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Abstract: This paper analyses the influence of thermal cycling at zero stress on the thermomechanical response of NiTi shape memory alloy (SMA) wire in the martensitic, R-phase and austenitic transformation ranges. An in depth study compares the mechanical properties of a sample thermally cycled at zero stress and a sample without thermal or mechanical cycling. The critical stress–temperature diagram for each sample is presented taking into account the R-phase transformation zone. The results show that thermal cycling has considerable impact on the transformation behaviour of the alloy and on the mechanical properties of the R-phase: the values of the apparent modulus and the critical transformation stresses are higher. The parameters that describe the SMA macromechanical behaviour, then, undergo a considerable change due to thermal cycling, suggesting that if an SMA has to be used throughout the R-phase range, the material should be thermally cycled to obtain better mechanical properties. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Materials Science & Engineering: A is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.msea.2008.10.026
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      – Code: eng
        Text: English
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      – SubjectFull: Shape memory alloys
        Type: general
      – SubjectFull: Nickel-titanium alloys
        Type: general
      – SubjectFull: Thermomechanical properties of metals
        Type: general
      – SubjectFull: Phase transitions
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      – SubjectFull: Phase diagrams
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      – SubjectFull: Materials science
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      – TitleFull: Effect of thermal cycling on the thermomechanical behaviour of NiTi shape memory alloys
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              Text: Feb2009
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