Material modeling of Ti?6Al?4V alloy processed by laser powder bed fusion for application in macro-scale process simulation

In the laser powder bed fusion of metals (PBF-LB/M), process simulation is a key factor to the optimization of the manufacturing process with reasonable amounts of resources. While the focus of research lies on the development of approaches to solve the problem of length scales when comparing the laser spot to a parts dimension, the conscientious modeling of the material applied provides an opportunity to increase the accuracy of computational studies with no significant increase in required computational resources. Within this study, a material model of the commonly used Ti?6Al?4V alloy for the thermo-mechanical process simulation at macro- and partscale is developed. Data reported in the literature as well as own experimental work is assembled to a model consisting of constant and linear functions covering the whole temperature interval relevant for PBF-LB/M. Also, possible influencing factors on both thermal and mechanical properties are investigated.