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Amorphization of Ni61 Nb39 Alloy by Laser Surface Treatment

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Abstract

The surface of Ni61 Nb39 crystalline ingot was treated by laser surface melting with different processing parameters. A fully amorphous layer with a thickness of approximately 10 μm could be produced on the top surface under optimal parameters. An amorphous-crystalline composite layer with the depth from 10 to 50 μm, consisting of amorphous matrix and intermetallic phases of Ni3 Nb and Ni6Nb7, could be formed. The micro-hardness (about 831 HV) of the treated surface was remarkably improved by nearly 100% compared with the value of the crystalline substrate caused by the formation of the fully amorphous structure. A finite volume simulation was adopted to evaluate the temperature distribution in the laser-affected zone of Ni61 Nb39 alloys and to reveal the mechanism of glass formation in the laser-affected zone.

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Authors and Affiliations

  1. Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, 100191, Beijing, China

    Zhong-xiang Lu (Master), Ran Li (Doctor, Associate Professor) & Tao Zhang

  2. China Aerospace Components Engineering Center, China Academy of Space Technology, 100094, Beijing, China

    Yan Li

Authors
  1. Zhong-xiang Lu
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  2. Ran Li
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  3. Yan Li
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  4. Tao Zhang
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Corresponding authors

Correspondence to Zhong-xiang Lu or Ran Li.

Additional information

Foundation Item:Item Sponsored by National Natural Science Foundation of China (51131002, 51301196); Fundamental Research Funds for the Central Universities of China (YWF-15–CLXY-002); Fok Ying Tong Education Foundation of China (142008)

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Lu, Zx., Li, R., Li, Y. et al. Amorphization of Ni61 Nb39 Alloy by Laser Surface Treatment. J. Iron Steel Res. Int. 23, 37–41 (2016). https://doi.org/10.1016/S1006-706X(16)30008-5

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  • DOI: https://doi.org/10.1016/S1006-706X(16)30008-5

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