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Effect of Laser Re-Melting Scan Strategy on Microstructure and Mechanical Properties of AlSi10Mg/SiC Composite Fabricated by Laser Powder Bed Fusion

Year: 2023

Type: article

Abstract: In this study, SiC (10 vol％) reinforced AlSi10Mg (Al-10 mass％Si-0.35 mass％Mg) alloy matrix composites were fabricated by laser powder bed fusion (L-PBF) process. The effect of laser re-melting scan on densification behavior, microstructural formation and mechanical properties of the specimens was examined. The relative density of the specimens increased by applying re-melting scan, especially under the condition of a low input energy density less than 200 J/mm3. No change was found in eutectic cell size in the microstructure of specimens by laser re-melting. On the other hand, the decomposition of SiC particles with corresponding formation of Al4SiC4 phase was enhanced and the hardness of the matrix region (excluding SiC particles) increased. A high ultimate compressive strength of 700 MPa was obtained when the composite was fabricated under an optimum building condition with re-melting scan due to the densification, a high volume fraction of SiC and fine microstructures.

Source: Journal of the Japan Institute of Metals and Materials

DOI: 10.2320/jinstmet.j2023016

Authors: Hajime Miyauchi, Hiroaki Matsumoto, Kozo Yokota

Institutions: Kagawa Prefectural Industrial Technology Center, Kagawa University

Language: English

Topic: Additive Manufacturing Materials and Processes

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: diamond

Funder: Japan Society for the Promotion of Science

OpenAlex ID: W4388965646

FWCI: 0.095

Cites: 27

Cited by: 1

Related to: 10