研究目的
This paper deals with the evolution of microstructure, texture and mechanical properties for selected alloy systems, namely the alloys of iron, aluminium, and titanium, which have been most extensively studied after SLM processing.
研究成果
The paper concludes that microstructure and crystallographic texture in materials processed using SLM is very different when compared to their conventionally processed counterparts, primarily due to the extremely high cooling rate and large thermal gradients. The mechanical properties of SLM-processed alloys are influenced by their microstructure and texture, with yield strength generally being higher but ductility lower than conventionally processed alloys. The study provides insights into the optimization of SLM processing conditions and scanning strategies to achieve desired mechanical properties in additively manufactured alloys.
研究不足
The reproducibility of mechanical properties has been seen as a major challenge due to porosity and cracks inherent to this route. Alloys which naturally possess lower ductility are more affected by porosity and cracks. Additionally, the applicability of SLM is limited to alloys which can absorb high amount of laser energy and exhibit high weldability, narrow solidification range and non-volatility.
