Abstract
Numerical simulations were proposed to research the influence of heat input parameters on the melting pool dimension and temperature field distribution during the selective laser melting process of Ti-6Al-4V powder. Firstly, temperature field results demonstrate that in the same powder layer, the center part of the sample will experience three more obvious heating processes under the irradiation of laser. Secondly, a good exponential function relationship is found between the melting pool dimension and volume energy density. Finally, based on the melting pool dimension from our numerical simulations, two full-process energy prediction diagrams are drawn to predict hatch spacing and powder layer thickness of SLM Ti-6Al-4V powder, consistent with the experimental results.
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