|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Building the Pathway towards Process and Material Qualification
||Effect of Process Time Interval on Mechanical Behavior of Metallic Parts Fabricated via Directed Energy Deposition
||Aref Yadollahi, MJ Mahtabi, Shuai Shao, Nima Shamsaei, Scott M Thompson
|On-Site Speaker (Planned)
The additive manufacture of various-sized components and/or multiple parts requires one to know the relationship between specific energy input and resultant thermal response. Since densification of material is directly coupled with part heat transfer, the process parameters found optimal for fabricating a single specimen are not necessarily optimal, or even usable, for fabricating larger lots or parts of different size and/or geometry (e.g. components). In this study, thermographic inspection is employed to characterize additively manufactured Ti-6Al-4V, Inconel 718 and stainless steel 316L. For a given material and a set of process parameters, various inter-layer time intervals, i.e. the time between successive layer deposits, are employed using a Laser Engineered Net Shaping (LENS) machine. The microstructure and mechanical behavior of fabricated parts are characterized and the results are explained based on measured thermal history during the build.
||Planned: Supplemental Proceedings volume