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The effect of the aging period on the martensitic transformation and kinetic characteristic of at % Cu68.09Al26.1Ni1.54Мn4.27 shape memory alloy

  • Physical Metallurgy and Heat Treatment
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Abstract

In this work, the effect of aging period on the characteristic transformation temperatures, thermodynamic parameters and structural variations of CuAlNiMn shape memory alloys were investigated. Aging was performed at above the austenite finish temperature of the un-aged specimen (120°C) for six different retention times, namely 1h, 2h, 3h, 4h, 5h and 6h. The changes in the transformation temperatures were examined by differential scanning calorimetry at different heating/cooling rates. The aging period was found to have an effect on the characteristic austenite and martensite transformation temperatures and thermodynamic parameters such as the enthalpy and entropy of alloys. High-temperature order-disorder phase transitions were determined using a differential thermal analysis, which showed that all the un-aged and aged specimens had an A2 → B2, B2 → L21 and an L21 → 9R, 18R transition. The structural analysis of the un-aged and aged specimens was performed through X-ray diffraction measurements at room temperature. The intensities of the diffraction peaks varied according to the aging time.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Faculty of Engineering, Aksaray University, 68100, Aksaray, Turkey

    Iskender Ozkul & Kemal Aldaş

  2. Department of Physics, Faculty of Science, Firat University, 23119, Elazig, Turkey

    C. Aksu. Canbay & Faruk Aladağ

Authors
  1. Iskender Ozkul
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  2. C. Aksu. Canbay
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  3. Faruk Aladağ
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  4. Kemal Aldaş
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Correspondence to Iskender Ozkul.

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Ozkul, I., Canbay, C.A., Aladağ, F. et al. The effect of the aging period on the martensitic transformation and kinetic characteristic of at % Cu68.09Al26.1Ni1.54Мn4.27 shape memory alloy. Russ. J. Non-ferrous Metals 58, 130–135 (2017). https://doi.org/10.3103/S1067821217020092

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  • DOI: https://doi.org/10.3103/S1067821217020092

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