Authors:
Aleš Nagode (1), Nejc Velikajne (2), Anemarie Veber (1), Irena Paulin (2), Matija Zorc (1), Borut Kosec (1), Borut Zorc (1), Milan Bizjak (1)
1- University of Ljubljana, Faculty of Natural Sciences and Engineering, Aškerčeva cesta 12, SI-1000 Ljubljana, Slovenia
2- Institute of Metals and technology, Lepi pot 11, SI-1000 Ljubljana, Slovenia
Abstract:
AlSIMg10 is a heat-treatable hypoeutectic alloy with good castability and weldability, which makes it interesting for additive manufacturing (AM). In the present work, selective laser melting (SLM) technology was used to fabricate samples of AlSi10Mg alloy. One of the main challenges, however, is to produce an alloy with good microstructural homogeneity and as little porosity, residual stresses and cracks as possible. The main objective of this experimental research was to find the optimal process parameters for the fabrication of AlSiMg10 samples by SLM, which have a suitable microstructure and mechanical properties. Since defects in microstructure are usually due to inadequate process parameters, the effect of laser power and scanning speed were studied. Microstructural analysis was performed using LM and SEM/EDS. The changes in microstructure during post-processing heat treatment were followed in-situ by thermoelectrometric measurements based on electrical resistivity.
DOI:
https://doi.org/10.59499/EP235748755