Process parameters effect on porosity rate of AlSi10Mg parts additively manufactured by Selective Laser Melting: challenges and research opportunities

Purpose: The present study aims to conduct a literature review on the various methods explored to enhance the quality of AlSi10Mg parts manufactured via the Selective Laser Melting (SLM) process. Specifically, the research focuses on identifying strategies for reducing the porosity level in SLM-fabricated AlSi10Mg parts. Considering the highly competitive nature of the market in which SLM technology is employed, improving part quality is necessary to ensure business continuity and maintain a competitive edge. Design/methodology/approach: The present study offers a comprehensive examination of the SLM process, particularly emphasising the diverse parameters that can influence the porosity rate in SLM-fabricated parts. By providing a detailed description of the SLM process, we highlight the intricacy of this technology and discuss the significance of various parameters. Furthermore, we present a literature review of prior research on SLM, summarising the studied parameters and their impact on porosity. This research aims to enhance our understanding of the SLM process and the parameters that affect the density of SLM-fabricated parts. Findings: The present study aims to identify research opportunities in the field of SLM technology. One particularly promising area of investigation is exploring the correlation between scan direction and the porosity rate in SLM-fabricated parts. This research seeks to enhance our understanding of the relationship between these two parameters and their potential impact on the quality of SLM-fabricated parts. Practical implications: By reducing porosity, industries such as aerospace and aeronautics can attain enhanced performance through mechanical system optimisation. Originality/value: The present study summarises the various methods previously investigated for reducing the porosity rate in parts manufactured using the SLM process. Additionally, it proposes new avenues for achieving further parameter optimisation to attain higher levels of quality.