naa a22 4500 510759033 CHVBK 20180411083132.0 cr unu---uuuuu 180411e20130401xx s 000 0 eng 10.1134/S086986431302011X doi (NATIONALLICENCE)springer-10.1134/S086986431302011X Modelling of heat and mass transfer in the laser cladding during direct metal deposition [Elektronische Daten] [D. Bedenko, O. Kovalev] A physical and mathematical model has been proposed for computing the thermal state and shape of the individual deposited track at the laser powder cladding. A three-dimensional statement of the two-phase problem of Stefan type with curved moving boundaries is considered. One of the boundaries is the melting-crystallization boundary, and the other is the boundary of the deposited layer, where the conservation laws are written from the condition of the inflow of the additional mass and energy. To describe the track shape the equation of kinematic compatibility of the points of a surface is used, the motion of which occurs at the expense of the mass of powder particles supplied to the radiation spot. An explicit finite difference scheme on a rectangular nonuniform grid is used for numerical solution of equations. The computations are carried out by through computation without an explicit identification of curved boundaries by using a modification of the immersed boundary method. The computational results are presented for the thermal state and the shape of the surface of the forming individual track depending on physical parameters: the substrate initial temperature, laser radiation intensity, scanning speed, powder feeding rate, etc. D.V. Bedenko and O.B. Kovalev, 2013 laser cladding nationallicence direct metal deposition nationallicence two-phase Stefan problem nationallicence moving curved boundary nationallicence numerical modelling nationallicence Bedenko D. Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia aut Kovalev O. Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia aut Thermophysics and Aeromechanics Nauka/Interperiodica 20/2(2013-04-01), 251-261 0869-8643 20:2<251 2013 20 11510 https://doi.org/10.1134/S086986431302011X text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S086986431302011X text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bedenko D. Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia aut NATIONALLICENCE 700 1- Kovalev O. Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia aut NATIONALLICENCE 773 0- Thermophysics and Aeromechanics Nauka/Interperiodica 20/2(2013-04-01), 251-261 0869-8643 20:2<251 2013 20 11510 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer