Due to the repeated thermal cycling that occurs with the processing of each subsequent
layer, the microstructure of additively manufactured parts undergoes complex changes
throughout the deposition process. Understanding and modeling this evolution poses a
greater challenge than for single-cycle heat treatments. Following the work of Kelly and
Charles, a Ti-6Al-4V microstructural model has been developed which calculates the phase
fractions, morphology, and alpha lath width given a measured or modeled thermal history …