Numerical investigation of the microstructure of a clad layer produced via laser cladding with coaxial metal powder injection

The microstructure of a clad layer produced via selective laser cladding with coaxial metal powder injection is studied numerically. The Johnson–Mehl–Avrami–Kolmogorov equation for condensed systems with inhomogeneous rates of nucleation is used to model the phase change kinetics. The impact of the...

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Bibliographic Details
Published in:Bulletin of the Russian Academy of Sciences. Physics 2016-04, Vol.80 (4), p.381-386
Main Authors: Khomenko, M. D., Panchenko, V. Ya, Niziev, V. G., Mirzade, F. Kh, Grishaev, R. V.
Format: Article
Language:English
Subjects:
Avrami equation
Clad metals
Hadrons
Heat transfer
Heavy Ions
Laser beam cladding
Mathematical models
Microstructure
Nuclear Physics
Nucleation
Phase change
Phase transitions
Physics
Physics and Astronomy
Proceedings of the XI Conference “Lasers and Laser Information Technologies: Fundamental Problems and Applications”
Rapid prototyping
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Summary:The microstructure of a clad layer produced via selective laser cladding with coaxial metal powder injection is studied numerically. The Johnson–Mehl–Avrami–Kolmogorov equation for condensed systems with inhomogeneous rates of nucleation is used to model the phase change kinetics. The impact of the substrate boundary along with interconnected heat transfer and phase change processes on the final microstructure of a built-up layer is demonstrated. The qualitative difference between the behavior of the temperature on the built-up layer’s surface and at the depth of the substrate is established, revealing the inhomogeneous microstructure of the final layer.
ISSN:1062-8738
1934-9432
DOI:10.3103/S1062873816040201