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Home > Archive>Volume 50, Issue 7, 2021 >2352-2357. DOI:10.12442/j.issn.1002-185X.E20200030
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Effect of Pr Addition on Microstructure, Phase Transforma-tion Behavior, and Hardness of Ni-Rich NiTi Shape Memory Alloy
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Baotou Medical College, Baotou 014040, China

Fund Project:

Natural Science Foundation of Inner Mongolia (2019BS03010); Ph. D. Start-up Foundation of Baotou Medical College (BSJJ201808)

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    Abstract:

    The influence of Pr addition on the microstructure, phase transformation, and hardness of Ni50Ti50-xPrx (x=0, 0.1, 0.3, 0.5, 0.7, 0.9, at%) shape memory alloys was investigated. Results show that Ni50Ti50-xPrx alloys consist of NiTi matrix and NiPr precipi-tates. Ni50Ti49.5Pr0.5 alloy has the optimal properties of martensitic transformation start temperature of 73 °C, the thermal hysteresis as narrow as 37 °C, and the Vickers hardness of 2850 MPa. Pr addition obviously decreases the martensitic transformation temperature of NiTi alloys, but the composite alloy maintains a relatively narrow thermal hysteresis and relatively high Vickers hardness, compared with other NiTi-based shape memory alloys.

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[Zhao Shilei, Zhao Kun, Wang Fuwen. Effect of Pr Addition on Microstructure, Phase Transforma-tion Behavior, and Hardness of Ni-Rich NiTi Shape Memory Alloy[J]. Rare Metal Materials and Engineering,2021,50(7):2352~2357.]
DOI：10.12442/j. issn.1002-185X. E20200030

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History
  • Received:July 10,2020
  • Revised:August 26,2020
  • Adopted:September 18,2020
  • Online: August 09,2021
  • Published: July 31,2021

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