Numerical Study to Represent Non-Isothermal Melt-Crystallization Kinetics at Laser-Powder Cladding


The study of laser-powder cladding process subject to heat transfer, melting and crystallization kinetics has been carried out numerically and experimentally. The Kolmogorov-Avrami equation was applied to describe the kinetics of the phase transitions. Characteristic behavior of temperature and conversion fields has been analyzed. Melt pool dimensions, clad height dependences on mass feed rate, laser power and scanning velocity have been investigated. It has been demonstrated that the melt zone has the boundary distinct from the melting isotherm due to the fact that melting occurs with superheating and crystallization takes place at undercooling. The calculated melt pool depth and clad height are in a good agreement with the experimental results.

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V. Niziev, F. Mirzade, V. Panchenko, M. Khomenko, R. Grishaev, S. Pityana and C. Rooyen, "Numerical Study to Represent Non-Isothermal Melt-Crystallization Kinetics at Laser-Powder Cladding," Modeling and Numerical Simulation of Material Science, Vol. 3 No. 2, 2013, pp. 61-69. doi: 10.4236/mnsms.2013.32008.

Conflicts of Interest

The authors declare no conflicts of interest.


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