Multicomponent multiphase modeling of dissimilar laser cladding process with high-speed steel on medium carbon steel

Zhao, Jiaxin1,2; Wang, Gang1,2; Wang, Xiangyu1,2; Luo, Sheng3; Wang, Liping1,2; Rong, Yiming3

2020

10.1016/j.ijheatmasstransfer.2019.118990

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER   影响因子和分区

0017-9310

1879-2189

During a laser cladding process, the transport phenomena in the molten pool, including rapid solidification, strong fluid convection, and species diffusion are complex, and determine the microstructure and composition of the cladding layer. In this study, a three-dimensional transient multicomponent multiphase model was proposed to simulate the dissimilar laser cladding process with T15 powder and T15/CeO2 mixed powder on 42CrMo substrate. The position and expression of the source terms on energy and mass were clearly defined. The model was validated by comparing the morphology of the cross section with single-track cladding experiments. The simulation results indicate that the molten pool is dominated by a strong Marangoni flow that results in a fully mixed cladding layer and a narrow transition zone at the bottom. The molten pool exhibits an inward flow pattern with pure T15 powder and an outward flow pattern with T15-CeO2 mixed powder. The content of the elements and the microstructure of the cladding layer were investigated by using an electron probe micro-analyzer and a scanning electron microscope. The microstructure evolves from planar to cellular, and to equiaxed dendrites from the substrate–clad interface to the top surface. The transition zone comprised of planar and cellular grains. The solidification characteristics calculated from the numerical model were associated to the grain morphology.
© 2019 Elsevier Ltd

Laser cladding Marangoni flow Multiphase modeling Transport phenomena Grain morphology

SCI ; EI

英语

其他

National Basic Research Program of China (973 Program)[61328302] ; National Natural Science Foundation of China[U1537202]

Thermodynamics ; Engineering ; Mechanics

Thermodynamics ; Engineering, Mechanical ; Mechanics

WOS:000509626100048

Elsevier Ltd

20194907787359

Binary alloys ; Cerium alloys ; Cerium oxide ; Chromium alloys ; Flow patterns ; High speed steel ; Laser cladding ; Molybdenum alloys ; Morphology ; Rapid solidification ; Scanning electron microscopy ; Textures ; Transport properties ; Viscous flow

Chromium and Alloys:543.1 ; Molybdenum and Alloys:543.3 ; Rare Earth Metals:547.2 ; Fluid Flow, General:631.1 ; Laser Applications:744.9 ; Physical Properties of Gases, Liquids and Solids:931.2

ENGINEERING

Web of Science

1.State Key Laboratory of Tribology & Institute of Manufacturing Engineering, Department of Mechanical Engineering, Tsinghua University, Beijing; 100084, China
2.Beijing Key Lab of Precision/Ultra-precision Manufacturing Equipments and Control, Tsinghua University, Beijing; 100084, China
3.Mechanical and Energy Engineering Department, South University of Science and Technology of China, Shenzhen; 518055, China

Zhao, Jiaxin,Wang, Gang,Wang, Xiangyu,et al. Multicomponent multiphase modeling of dissimilar laser cladding process with high-speed steel on medium carbon steel[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,2020,148.

Zhao, Jiaxin,Wang, Gang,Wang, Xiangyu,Luo, Sheng,Wang, Liping,&Rong, Yiming.(2020).Multicomponent multiphase modeling of dissimilar laser cladding process with high-speed steel on medium carbon steel.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,148.

Zhao, Jiaxin,et al."Multicomponent multiphase modeling of dissimilar laser cladding process with high-speed steel on medium carbon steel".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 148(2020).