Authors:
Hanna Nilsson Åhman (1,2), Pelle Mellin (1), Francesco D’Elia (2), Cecilia Persson (2)
1- Swerim AB, Sweden
2- Div. of Biomedical engineering, Dept. of Materials Science and Engineering, Uppsala University, Sweden
Abstract:
Powder bed fusion – laser beam (PBF-LB) of Mg alloys has great potential, both for producing patient specific implants and lightweight structures. However, the relationship among PBF-LB parameters, microstructure, and resulting material properties is poorly understood. As a first step towards a better understanding, the effect of various process conditions on the melt pool geometry and the microstructure formed is herein investigated. From the results it can be concluded that a lower scanning speed or a higher power result in deeper melt pools and more dendritic grains due to a warmer process. Similarly, thinner wall thickness also resulted in dendritic grains. A change in laser scanning line rotation between each layer showed that the grains tend to grow within the melt pool, rather than across several layers as seen for other alloys. These results show the importance of the parameters studied, and future work should investigate the resulting material properties.
DOI:
https://doi.org/10.59499/EP235762947