Abstract
A transient 3‐D numerical model including heat transfer, solute transport and phase change kinetics is developed for laser cladding with coaxial injection of nickel superalloy powders. The evolution of the temperature and composition distributions of the built‐up layer is investigated. The modified Kolmogorov–Johnson–Mehl–Avrami equation is used for phase change modeling considering non‐homogeneous temperature distribution of the melt pool. The influence of self-consistent heat conduction and phase change kinetics as well as of substrate boundary and soluble impurity atoms on the phase change process is analyzed. The results indicate the influence of solute concentration on the rapid crystallization process and can be used for the clad layer dimensions and microstructure estimation in laser cladding with nickel superalloy powder injection.
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Acknowledgments
The authors thank A. V. Dubrov for fruitful discussions of hydrodynamic flow in meltpool. This work was carried out with financial State support by the Ministry of Education and Science according to the Grant Agreement # 14.626.21.0001 (UID RFMEF162614X0001) under the Federal Special-Purpose Program “Research and development on priority directions of scientific-technological complex of Russia for 2014–2020”.
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This article is part of the Topical Collection on Laser technologies and laser applications.
Guest Edited by José Figueiredo, José Rodrigues, Nikolai A. Sobolev, Paulo André and Rui Guerra.
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Mirzade, F.K., Khomenko, M.D. & Niziev, V.G. Numerical simulation of solute evolution during laser cladding with nickel superalloy powder injection. Opt Quant Electron 48, 513 (2016). https://doi.org/10.1007/s11082-016-0779-4
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DOI: https://doi.org/10.1007/s11082-016-0779-4