Impact and modal characteristics of steels manufactured by a novel hybrid selective laser melting method

Abstract

One of the most popular methods of manufacturing metal parts is selective laser melting (SLM). This study uses a novel hybrid manufacturing method for lattice structures, integrating vibration modal and Charpy impact analyses. This integrated approach offers a promising route for advancing the understanding and optimisation of lattice structures in additive manufacturing. This research aims to discover the Charpy impact and vibration-damping behaviours of the 316 L, MS1, and 316 L + 2%Cu alloys and their lattice samples. Charpy impact tests revealed 33 J energy absorption, with the 316 L + 2%Cu material closed hexagon lattice structure. Vibration modal analysis provided insights into dynamic behaviour, aiding in identifying weaknesses. The closed hexagon lattice structure of MS1 exhibited damping ratio of 0.7, indicating its strong potential for vibration-damping applications. Results showcase the potential for widespread industrial applications, emphasising the importance of integrating structural and mechanical assessments in additive manufacturing processes.