|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Nano/Micro-mechanics and Length-scale Phenomena
||Effect of LPBF Parameters on Post Heat Treatment Microstructure and Sub-sized Tensile Properties of LPBF Inconel 718
||Jayaraj Radhakrishnan, Punit Kumar, Upadrasta Ramamurty
|On-Site Speaker (Planned)
Novel LPBF processing strategies have shown to enhance tensile properties of IN718 by designing mesostructure and controlling texture evolution. In light of such efforts, there is a need to scrutinize the applicability of standard heat treatment on different as-fabricated microstructures. Moreover, it is important to study the cascading effect of in-built texture and sub-grain boundary fraction on post heat treatment grain growth and precipitate evolution. In the present work, quasi-static sub-sized tensile tests of heat-treated IN718 fabricated using two distinct LPBF machines were conducted. Five heat treatments were conducted by selecting solutionizing temperature above and below the solvus of δ and Laves phase to vary the proportion of strengthening precipitates. Role of cellular structure, microstructure, texture, and precipitates on the strengthening mechanism and ductility was examined to elucidate the observed differences in tensile properties of IN718.
||Additive Manufacturing, Mechanical Properties, High-Temperature Materials