Effect of Heat Treatment on Wear Characterization of AlSi10Mg Alloy Manufactured by Selective Laser Melting
Mudda Nirish and R Rajendra
Mechanical Engineering Department, University College of Engineering (A), Osmania University, Telangana, India.
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In this research, the wear and mechanical properties of an AlSi10Mg alloy made by selective laser melting (SLM) were studied. The given process parameter influence of laser power energy densification behaviour and the effect of post heat treatment on wear characterization were investigated. However, the wear and mechanical properties of the AlSi10Mg alloy showed better results than the Al6061-cast alloys. The SLM printed parts qualified for a structural geometric change from using the standard powder particle morphology (powder particle distribution range of 20 to 63 µm). The highest AlSi10Mg theoretical density of 2.67 g/cm3 and after SLM manufactured parts density was achieved by 99.6%. The laser energy density was calculated based on the given process parameter as 150 J/mm3. The results obtained showed that the AlSi10Mg alloy had the lowest wear (both as built and post heated conditions) compared to the cast Al6061 material. Finally, at 200 rpm with a load of 60 N, the AlSi10Mg alloy produced the least wear rate of 1.39×10-8 mm2/N and a wear coefficient of 0.01mm2/N. The wear rate and wear coefficient increased as the slide speed increased. The hardness of the SLM-AlSi10Mg alloy Vickers was measured at 126±5 HV (as built) and 129±5 HV (pre heated at 2000C).