The effect of beam scan strategies on microstructural variations in Ti-6Al-4V fabricated by electron beam powder bed fusion

In electron beam melting (EBM) powder bed fusion (PBF), variations in electron beam scan strategies can be used to control thermal transients in the additive manufacturing process, both in the melt pool and in previously deposited layers. In this study, three different EBM beam scan strategies, i.e. the standard raster scan, ordered spot scan, and random spot scan patterns, were used to fabricate three identical Ti-6Al-4V blocks. Using scanning...