Dimensional Accuracy and Surface Roughness Analysis for AlSi10Mg Produced by Selective Laser Melting (SLM)

K Kamarudin,M.S Wahab,Aqeel Ahmed,Z Shayfull,A.A Raus,S Sharif,S.A Zainol Murad,M.M.A.B Abdullah,S.S Mat Isa,M.F Ghazali,N Mat Saad,S.Z Abd Rahim,M.M Ramli

doi:10.1051/matecconf/20167801077

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.

Highlights

Selective Laser Melting (SLM) is a layer-wise material addition technique that allows generating complex 3D parts by selectively consolidating successive layers of powder material on top of each other, using thermal energy supplied by a focused and computer controlled laser beam [1,2,3,4]
The breakthrough of SLM as a Rapid Manufacturing technique will depend on the reliability, performance and economical aspects like production time and cost [13]
AlSi10Mg has been characterised with rapid manufacturing technique by SLM technology

Summary

Introduction

Selective Laser Melting (SLM) is a layer-wise material addition technique that allows generating complex 3D parts by selectively consolidating successive layers of powder material on top of each other, using thermal energy supplied by a focused and computer controlled laser beam [1,2,3,4]. Aluminium-Silicon alloys are characterised by sound castability, great weld ability and excellent corrosion resistance. Due to their attractive combination of mechanical properties, high heat conductivity and low weight, the Al-Si alloys found a large number of applications in automotive, aerospace and domestic industries [2]. SLM allows parts to be built additively to form near net shape components rather than by removing waste material. Much of the part from SLM technologies is on lightweight fabrication that applied for aerospace This technology is able to manufacture multifaceted shapes where traditional manufacturing constraints, such as tooling and physical access to surfaces for machining and restrict the design of components [6]

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Results

Conclusion