Abstract. Selective Laser Melting (SLM) is an Additive Manufacturing (AM) technique that built 3D part in a layer-by-layer method by melting the top surface layer of a powder bed with a high intensity laser according to sliced 3D CAD data. AlSi10Mg alloy is a traditional cast alloy that is broadly used for die-casting process and used in automotive industry due its good mechanical properties. This paper seeks to investigate the requirement SLM in rapid tooling application. The feasibility study is done by examining the surface roughness and dimensional accuracy as compared to the benchmark part produced through the SLM process with constant parameters. The benchmark produced by SLM shows the potential of SLM in a manufacturing application particularly in moulds.

Abstract-Selective Laser Melting (SLM) is an advance Additive Manufacturing (AM) technique in which a component is manufacturing in a layer by layer manner by melting the top surface of a powder bed with a high intensity laser according to sliced 3D CAD data. AlSi10Mg alloy is a traditional cast alloy that is often used for die-casting. Because of its good mechanical and other properties, this alloy has been widely used in the automotive industry. In this work, the effects on the relative density is investigated for SLM-produced AlSi10Mg parts on one factor at a time (OFAT) basis by keeping constant various parameters such as laser power, scanning speed and hatching distance. It is shown that AlSi10Mg parts produced by SLM having best relative density values are at 350 watt laser power, 1650 mm/s of scanning speed and hatching distance of 0.13mm.

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-In the past few decade, Additive Manufacturing (AM) has become popular and substantial to manufacture direct functional parts in varieties industrial applications even in very challenging like aerospace, medical and manufacturing sectors. Selective Laser Melting (SLM) is one of the most efficient technique in the additive Manufacturing (AM) which able to manufacture metal component directly from Computer Aided Design (CAD) file data. Accuracy, mechanical and physical properties are essentials requirement in order to meet the demand of those engineering components. In this paper, the mechanical properties of SLM manufactured AlSi10Mg samples such as hardness, tensile strength, and impact toughness are investigated andcompared to conventionallyhigh pressure die cast A360 alloy. The results exposed that the hardness and the yield strength of AlSi10Mg samples by SLM were increased by 42% and 31% respectively to those of conventionally high pressure die cast A360 alloy even though without comprehensive post processing methods. It is also discovered that AlSi10Mg parts fabricated by SLM achieved the highest density of 99.13% at the best setting parameters from a previous studyof 350 watts laser power, 1650 mm/s scanning speed and hatching distance 0.13 mm. Keywords-Additive Manufacturing; AlSi10Mg; Mechanical Properties; Selective Laser Melting I. INTRODUCTION Selective Laser Melting (SLM) is one of the best technique in the additive Manufacturing (AM) which able to produce metal component with a single step process by following the Computer Aided Design (CAD) file data. Contrasting by conventional subtractive machining methods, SLM produced parts by a layer construction process, whereas thin layers of material are deposited/solidified, intricately, stacked on top of another. The layer information originates from 2-D cross sections of a 3-D CAD model. The fabrication process replications continue from bottom to top until the product is completed [1]- [4]. With the development of SLM over the past decade, the demand of the complex and new customize products on the market can be complied and simultaneously reduced the production time and manufacturing costs. Furthermore, SLM techniques are categorized green manufacturing by recycling the powder material that leads to zero wastage within the processes.In the AMpowder bed technique as illustrated inFig. 1. The piston raisedthe powder dispenser platform within the range of the thickness layer that been specified and then the re-coater arm distributed a layer of powder on top of the powder bed.A laser beam then melts and fuse the layer of powder metal, referring to the generated slice. After fabricating a layer was completed, the build piston will lower down the build platform and the following layer of powder is spread. The fabrication process repetitions continue from bottom to top until the part is completed.The SLM process is controlled by the set of parameters demonstrated in Table I that has a great influence on the quality of the final part [5]. The foremos...