Effect of melting modes on microstructure and tribological properties of selective laser melted AlSi10Mg alloy

Wu, H. and Ren, Y. and Ren, J. and Cai, A. and Song, M. and Liu, Y. and Wu, X. and Li, Q. and Huang, W. and Wang, X. and Baker, I. (2020) Effect of melting modes on microstructure and tribological properties of selective laser melted AlSi10Mg alloy. Virtual and Physical Prototyping. ISSN 1745-2759

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Abstract

This paper focuses on the effect of melting modes on microstructural evolution and tribological properties of AlSi10Mg alloy fabricated by selective laser melting (SLM). The results showed that the microstructures of SLM AlSi10Mg consisted of primary α-Al surrounded by cellular Si networks (∼500 nm) when fabricated in conduction mode, but has a finer cellular-like Si phase (∼200 nm) when fabricated in keyhole mode. The strong convection caused by the melt reflow and Marangoni convection under keyhole mode also resulted in deposition of nano-scale Si particles at the bottom of the molten pool. The SLM AlSi10Mg fabricated in keyhole mode exhibited better wear resistance than that fabricated in conduction mode. Compared to traditional as-cast specimens, both SLM specimens showed better wear resistance due to the unique cellular-like networks. The SLM technique offers a new approach for material processing that can be used to refine microstructures for improved tribological properties. © 2020 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

Item Type:
Journal Article
Journal or Publication Title:
Virtual and Physical Prototyping
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2209
Subjects:
ID Code:
148065
Deposited By:
Deposited On:
09 Oct 2020 14:50
Refereed?:
Yes
Published?:
Published
Last Modified:
20 Oct 2020 08:47