| Abstract Scope |
Laser powder bed fusion is a fast-developing metal additive manufacturing process which has attracted considerable attention in the aerospace and biomedical industries to manufacture Ti-6Al-4V material. Among all factors impacting the fatigue performance of LPBF Ti-6Al-4V parts, feedstock characteristics plays the most critical roles. In response to this challenge, this study endeavors to explore fatigue data collected from LPBF processed Ti-6Al-4V coupons printed using critical feedstock parameters e.g particle size distribution, reused powders, and oxygen content. The effect of Ti-6Al-4V feedstock parameters is primarily linked to the fatigue properties highlighting microstructure, defects, and failure mechanisms in the as-fabricated, stress released, heat treated and HIPed conditions. Results are subsequently compared to conventionally manufactured Ti-6Al-4V through casting, welding, extrusion. It is shown that fatigue performances highly depend on the feedstock parameters, but these effects are different, depending on the loading domains, high cycle fatigue and low cycle fatigue. |