X-Ray Diffraction Studies of the Reversible Phase Transformation in NiTi Shape Memory Alloy

• Authors: Z. Lekston , M. Zubko
• Languages of publication: EN

Abstracts

EN

In the present paper the phase transformations occurring in hot worked and heat-treated Ni-rich NiTi shape memory alloy were studied using X-ray diffraction, differential scanning calorimetry and bend and free recovery measurements. Based on conducted measurements it can be seen that in the studied alloy two-step B2 ↔ R ↔ B19' phase transitions occurred. Due to the fact that during heating the phase transition B2 → R and R → B19' occurs in a very narrow temperature range and differential scanning calorimetry peaks overlap additional X-ray diffraction measurements were performed. Obtained characteristic temperatures from applied different experimental methods are in good agreement. The optimum heat-treatment was selected to obtain rods with a shape recovery temperature A_{f} below 37°C to prepare prototypes of medical implants activated by patients body heat.

Keywords

EN

62.20.fg; 81.30.Kf; 61.05.cp

Discipline

• 62.20.fg: Shape-memory effect; yield stress; superelasticity
• 61.05.cp: X-ray diffraction
• 81.30.Kf: Martensitic transformations

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2016
• Volume: 130
• Issue: 4
• Pages: 1059-1062

Dates

published

2016-10

Contributors

author

Z. Lekston

• Institute of Materials Science, University of Silesia, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland

author

M. Zubko

• Institute of Materials Science, University of Silesia, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland

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Identifiers

DOI

10.12693/APhysPolA.130.1059