Simulation of surface deformation control during selective laser melting of AlSi10Mg powder using an external magnetic field

Liwei Chen; Hui Li; Sheng Liu; Shengnan Shen; Tao Zhang; Yicang Huang; Guoqing Zhang; Yunfan Zhang; Bo He; Chongkun Yang

doi:10.1063/1.5085735

AIP Advances (Apr 2019)

Simulation of surface deformation control during selective laser melting of AlSi10Mg powder using an external magnetic field

Liwei Chen,
Hui Li,
Sheng Liu,
Shengnan Shen,
Tao Zhang,
Yicang Huang,
Guoqing Zhang,
Yunfan Zhang,
Bo He,
Chongkun Yang

Affiliations

Liwei Chen: Key Laboratory of Transients in Hydraulic Machinery, Ministry of Education, School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China
Hui Li: Key Laboratory of Transients in Hydraulic Machinery, Ministry of Education, School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China
Sheng Liu: Key Laboratory of Transients in Hydraulic Machinery, Ministry of Education, School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China
Shengnan Shen: Key Laboratory of Transients in Hydraulic Machinery, Ministry of Education, School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China
Tao Zhang: Key Laboratory of Transients in Hydraulic Machinery, Ministry of Education, School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China
Yicang Huang: Key Laboratory of Transients in Hydraulic Machinery, Ministry of Education, School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China
Guoqing Zhang: Key Laboratory of Transients in Hydraulic Machinery, Ministry of Education, School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China
Yunfan Zhang: Key Laboratory of Transients in Hydraulic Machinery, Ministry of Education, School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China
Bo He: Key Laboratory of Transients in Hydraulic Machinery, Ministry of Education, School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China
Chongkun Yang: Key Laboratory of Transients in Hydraulic Machinery, Ministry of Education, School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China

DOI: https://doi.org/10.1063/1.5085735
Journal volume & issue: Vol. 9, no. 4
pp. 045012 – 045012-9

Abstract

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Selective laser melting (SLM) produces complex physical behaviors. After laser melting, the molten pool condenses with an uneven surface, which influences the next powder spreading process and affects the quality of the final product. This phenomenon is mainly caused by the Marangoni effect, which is generated by the surface tension of the liquid. This paper describes a method to control the surface deformation during the SLM of AlSi10Mg powder. It is assumed that there is a magnetic field (MF) added to the alloy powder generating a Lorentz force in the molten pool (MP). The Lorentz force can decrease the impact of the Marangoni effect and change the velocity field. Our work simulates the AlSi10Mg alloy melting process, and analyzes the physical parameters of the MP with or without an MF. It is found that increasing the MF within a certain range decreases the impact of the Marangoni effect, resulting in a smoother surface.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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