INVESTIGATION OF IRREGULAR THERMAL BEHAVIOUR OF ALSI10MG COMPONENTSMANUFACTURED BY LPBF.

The unique thermal history associated with the LPBF manufacturing process is closely linked to the distinct behaviour exhibited by parts manufactured via this method, which significantly deviates from that of parts produced via conventional techniques. Specifically, AlSi10Mg specimens manufactured via LPBF exhibit a heterogeneous microstructure, unequivocal high-strength properties, and a distinct response to thermal loading. This latter characteristic can be regarded as a crucial parameter in determining the potential applications of LPBF-manufactured AlSi10Mg specimens, as it indirectly indicates the microstructural alterations induced by thermal loading. In this study, we explore the thermal behaviour of AlSi10Mg cylinders produced via L-PBF through physical simulations. Three different thermal cycles were applied to the cylinders, and the imposed and actual temperatures were evaluated and compared. Subsequently, the obtained signal was filtered to eliminate the effects of the PID controller. The filtered signal was then subjected to a thorough analysis, with a focus on comparing the identified peaks with the distinct thermal behaviour previously reported in the literature for LPBF AlSi10Mg specimens. These identified peaks were subsequently linked to temperature-induced microstructural changes. The noteworthy correlations established in this investigation can be perceived as foundational knowledge for tailoring the heat treatment processes applied to LPBF-manufactured AlSi10Mg parts. [ABSTRACT FROM AUTHOR]