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Toward prediction of microstructural evolution during laser surface alloying

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Abstract

The stability of tungsten carbide particles in iron-rich and nickel-rich liquid during the laser surface alloying (LSA) process was investigated. Kinetic calculations indicate a rapid dissolution of tungsten carbide particles in iron-rich liquid, as compared with the dissolution rate in nickel-rich liquid. Optical microscopy indicated a heterogeneous microstructure around the tungsten particles that is in agreement with concentration gradients predicted by kinetic calculations. The work demonstrates the applicability of computational thermodynamics and kinetic models for the LSA process.

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Author notes

  1. K. D. Parks (Research Staff Member, President & CEO)

    Present address: the Laser Processing Division, Applied Research Laboratory, Pennsylvania State University, 16802, University Park, PA

Authors and Affiliations

  1. the M&C Division, Oak Ridge National Laboratory, 37831-6095, Oak Ridge, TN

    S. S. Babu R&D (Staff Member) & S. A. David (Group Leader and Corporate Fellow)

  2. the Laser Processing Division, Applied Research Laboratory, Pennsylvania State University, 16802, University Park, PA

    R. P. Martukanitz (Assistant Director)

  3. Duncan Parks Enterprises Inc., 37352, Lynchburg, TN

    K. D. Parks (Research Staff Member, President & CEO)

Authors
  1. S. S. Babu R&D
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  2. S. A. David
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  3. R. P. Martukanitz
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  4. K. D. Parks
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Babu, S.S., David, S.A., Martukanitz, R.P. et al. Toward prediction of microstructural evolution during laser surface alloying. Metall Mater Trans A 33, 1189–1200 (2002). https://doi.org/10.1007/s11661-002-0220-4

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  • DOI: https://doi.org/10.1007/s11661-002-0220-4

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