Post-Processing of AM-SLM AlSi10Mg Specimens: Mechanical Properties and Fracture Behaviour
Abstract
In this paper, the mechanical properties and fracture behavior of additive manufactured AlSi10Mg specimens were investigated. The samples were manufactured by the powder-bed process known as Selective Laser Melting and underwent machining afterwards. Nine samples were tested in the as-built condition, as well as after stress relief heat treatment at two temperatures (573K and 813K); six samples were tested after Hot Isostatic Pressing (HIP) treatments at two temperatures (600K and 800K) under a 100MPa Isostatic pressure. The results were analyzed and revealed that the post-processing treatments had a profound effect on the overall mechanical properties. HIP treatments show a trend of an inverse relation, the increase in HIP temperature leads to a decrease in tensile strength. Another phenomenon observed after the HIP treatment was the elimination of porosity and the significant increase in the elongation values. The results of this preliminary research demonstrated, for the first time in literature, the possibility of controlling the mechanical properties of AlSi10Mg AM-SLM material by the HIP process.
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