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Effects of Mechanical Alloying on Ni-Rich NiTi Shape Memory Alloys Produced by Hot Isostatic Pressing

  • PRODUCTION PROCESSES AND PROPERTIES OF POWDERS
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Abstract

Although Ni-rich 60 NiTi shape memory alloy (SMA) shows superior properties, it is difficult to process due to its high hardness and studies on the manufacturing method are still needed. By the hot isostatic pressing process (HIP), parts close to the net shape are produced and the second operation may no longer be required. In this study, the effects of mechanical alloying on NiTi alloy produced by the HIP process were investigated. The starting powders of the first group were mechanically alloyed. The starting powders of the second group were mechanically mixed. Afterwards, the microstructures, transformation temperatures and some mechanical properties of these two groups were compared. For these examinations, SEM-EDS, XRD, DSC analyzes and microhardness measurement, density measurement by hydrostatic weighing method were performed. The result showed, mechanical alloying causes a more homogeneous microstructure and higher transformation temperatures.

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ACKNOWLEDGMENTS

This study was financially supported by Ege University (FDK-2019-20798 doctoral scientific research project) and Kastamonu University (Project no: KUhızdes2021/47).

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Authors and Affiliations

  1. Kastamonu Vocational School, Kastamonu University, Kastamonu, Turkey

    Ümit Zeybek

  2. Faculty of Engineering, Mechanical Engineering Department, Ege University, Izmir, Turkey

    Serdar Karaoğlu

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  1. Ümit Zeybek
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Correspondence to Ümit Zeybek.

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Ümit Zeybek, Serdar Karaoğlu Effects of Mechanical Alloying on Ni-Rich NiTi Shape Memory Alloys Produced by Hot Isostatic Pressing. Russ. J. Non-ferrous Metals 63, 336–343 (2022). https://doi.org/10.3103/S1067821222030130

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