Experimental Mechanics

, Volume 46, Issue 4, pp 531–542 | Cite as

Phase-Transformation Fronts Evolution for Stress- and Strain-Controlled Tension Tests in TiNi Shape Memory Alloy

  • E. A. Pieczyska
  • S. P. Gadaj
  • W. K. Nowacki
  • H. Tobushi
Article

Abstract

Nucleation and development of phase transformation fronts in TiNi shape memory alloy subjected to the stress- and strain-controlled tension tests were investigated. A thermovision camera was applied to register the distribution of infrared radiation emitted by the specimen and to find its temperature variations. During the loading, narrow bands of considerably higher temperature corresponding to the martensitic phase, starting from the central part of the specimen and developing towards the specimen grips, under both approaches, were registered. The inclined bands of heterogeneous temperature distribution were observed also during the unloading process of the SMA, while the reverse transformation accompanied by temperature decrease took place. Thermomechanical aspects of martensitic and reverse transformations for various strain rates were analyzed under both stress- and strain-controlled tests.

Keywords

Shape memory alloy Martensitic transformation Phase transformation front Temperature change Stress-controlled test Strain-controlled test Infrared thermography 

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Copyright information

© Society for Experimental Mechanics 2006

Authors and Affiliations

  • E. A. Pieczyska
    • 1
  • S. P. Gadaj
    • 1
  • W. K. Nowacki
    • 1
  • H. Tobushi
    • 2
  1. 1.Institute of Fundamental Technological ResearchPolish Academy of SciencesWarsawPoland
  2. 2.Department of Mechanical EngineeringAICHI Inst. of TechnologyToyotaJapan

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