TY - JOUR

T1 - Development and application of laser cladding modeling technique: From coaxial powder feeding to surface deposition and bead formation

AU - Kovalev, O. B.

AU - Bedenko, D. V.

AU - Zaitsev, A. V.

PY - 2018/5/1

Y1 - 2018/5/1

N2 - A numerical modeling technique is developed for the processes of coaxial laser gas-powder cladding occurring in additive technologies for the manufacture of complex geometry objects. The model is based on a three dimensional (3D) description of mutually related problems of gas dynamics, powder transport, laser heating, and thermal processes in the clad bead and substrate, which are considered without convection in the melt pool. The results of gas-disperse flow modeling with a triple coaxial nozzle are presented. Analysis of bead profiles on a flat substrate with variation in operating parameters is carried out. It is revealed that a self-consistent and practically reasonable model can be obtained when the considered processes are described in а mathematically conjugate 3D formulation. Comparison of the calculated bead profiles and experimental data (for the powder mixture with 16NCD13 steel and titanium carbide TiC) shows a good qualitative and quantitative correlation. In addition, regularities of the modeled repeated beam scanning and production of overlapped profiles of the beads lying beside each other on the flat substrate are discussed.

AB - A numerical modeling technique is developed for the processes of coaxial laser gas-powder cladding occurring in additive technologies for the manufacture of complex geometry objects. The model is based on a three dimensional (3D) description of mutually related problems of gas dynamics, powder transport, laser heating, and thermal processes in the clad bead and substrate, which are considered without convection in the melt pool. The results of gas-disperse flow modeling with a triple coaxial nozzle are presented. Analysis of bead profiles on a flat substrate with variation in operating parameters is carried out. It is revealed that a self-consistent and practically reasonable model can be obtained when the considered processes are described in а mathematically conjugate 3D formulation. Comparison of the calculated bead profiles and experimental data (for the powder mixture with 16NCD13 steel and titanium carbide TiC) shows a good qualitative and quantitative correlation. In addition, regularities of the modeled repeated beam scanning and production of overlapped profiles of the beads lying beside each other on the flat substrate are discussed.

KW - Bead profile formation

KW - Coaxial powder transportation

KW - Heat transfer

KW - Laser cladding

KW - Multi-path deposition

KW - Numerical modeling

KW - Powder utilization factor

KW - BEHAVIOR

KW - NOZZLE

KW - SUPERALLOY

KW - SMOOTH

KW - DIRECT METAL-DEPOSITION

KW - FLOW

KW - PREDICTION

KW - TRANSPORT

KW - NUMERICAL-SIMULATION

KW - GEOMETRY

UR - http://www.scopus.com/inward/record.url?scp=85042139216&partnerID=8YFLogxK

U2 - 10.1016/j.apm.2017.09.043

DO - 10.1016/j.apm.2017.09.043

M3 - Article

AN - SCOPUS:85042139216

VL - 57

SP - 339

EP - 359

JO - Applied Mathematical Modelling

JF - Applied Mathematical Modelling

SN - 0307-904X

ER -