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2016 | 130 | 4 | 1081-1084
Article title

Structure and Properties of NiTi Shape Memory Alloy after Cold Rolling in Martensitic State

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EN
Abstracts
EN
Due to unique features, like shape memory effects and superelasticity, NiTi alloys with nearly equiatomic composition are used in various branches of industry. Application of severe plastic deformation can drastically change properties of the materials. In the present paper the Ni_{50.4}Ti_{49.6} alloy after cold rolling in the martensitic state and further annealed is studied. Phase transformations were studied using X-ray diffraction and differential scanning calorimetry measurements. Microstructure was examined using transmission electron microscopy and electron backscattering diffraction methods. Mechanical properties of obtained alloys has been studied using Vickers microhardness tests. Based on the performed measurements it can be seen that in studied alloys two steps B2 ↔ R ↔ B19' phase transitions occurred. Performed plastic deformation influences course of phase transitions and phases composition. Due to the reduction of grain size microhardness of the studied material is increasing with increase of deformation degree.
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Contributors
author
  • Institute of Materials Science, University of Silesia, Chorzów, Poland
author
  • Institute of Materials Science, University of Silesia, Chorzów, Poland
author
  • Institute of Materials Science, University of Silesia, Chorzów, Poland
author
  • Institute of Materials Science, University of Silesia, Chorzów, Poland
References
  • [1] T. Duerig, D. Stoeckel, D. Johnson, Proc. SPIE 4763, 7 (2002), doi: 10.1117/12.508666
  • [2] H. Morawiec, Z. Lekston, Medical implants with shape memory effect, (monograph), Wyd. Pol. Śl. w Gliwicach, Poland 2010 (in Polish)
  • [3] T. Yoneyama, S. Miyazaki, Shape memory alloys for biomedical applications, Woodhead Publ. Ltd and CRC Press LLC, England 2009
  • [4] K. Otsuka, X. Ren, Progr. Mater. Sci. 50, 511 (2005), doi: 10.1016/j.pmatsci.2004.10.001
  • [5] D. Stróż, J. Palka, Z. Lekston, G. Dercz, Mater. Sci. Forum 738-739, 501 (2013), doi: 10.4028/www.scientific.net/MSF.738-739.501
  • [6] H. Morawiec, J. Ilczuk, D. Stróż, T. Goryczka, D. Chrobak, J. Phys. IV 7, C5-155 (1997), doi: 10.1051/jp4:1997524
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv130n477kz
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