The Martensitic Transformation and Mechanical Properties of Ti6Al4V Prepared via Selective Laser Melting.

This article investigated the microstructure of Ti6Al4V that was fabricated via selective laser melting; specifically, the mechanism of martensitic transformation and relationship among parent β phase, martensite (α') and newly generated β phase that formed in the present experiments were elucidated. The primary X-ray diffraction (XRD), transmission electron microscopy (TEM) and tensile test were combined to discuss the relationship between α', β phase and mechanical properties. The average width of each coarse β columnar grain is 80⁻160 μm, which is in agreement with the width of a laser scanning track.