Fatigue Life of Selective Laser Melted and Hot Isostatically Pressed Ti-6Al-4v Absent of Surface Machining

摘要

Experimental research was conducted on the fatigue life of Selective Laser Melted Ti-6Al-4v. A thorough understanding of the fatigue life performance for additively manufactured parts is necessary before such parts are utilized as production end-items for real-world applications such as the rapid, on-demand, 3D-printing of aircraft replacement parts. This research experimentally examines the fatigue life of Ti-6Al-4v material specimens built directly to net shape and then either stress-relieved or Hot Isostatically Pressed (HIP). Experimental results will help determine whether HIP effectively reduces porosity and increases fatigue life when the specimen surface is not machined to remove surface roughness from the additive manufacturing process.