|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Beyond the Beam III
||Binder Jet Additive Manufactured H13: Microstructure Evolution and Properties
||Peeyush Nandwana, Rangasayee Kannan, Kinga A Unocic
|On-Site Speaker (Planned)
Binder jet additive manufacturing (BJAM) has the potential for industry adoption for tooling and heavy-duty engine applications owing to low capital costs and scalability. The near net shaping enabled by BJAM can enable the use of difficult to machine materials for heavy duty pistons. We have used supersolidus liquid phase sintering (SLPS) to densify H13 steel fabricated via BJAM followed by hot isostatic pressing (HIP) to reduce the porosity in the sintered parts. Microstructural evolution during SLPS and the underlying mechanisms will be presented. We show that abnormal grain growth can occur during sintering whereas the solidification of liquid formed during SLPS can result in solute segregation. Further, the impact of post processing steps such as HIP and heat treatment on the resulting microstructure and tensile properties will be discussed.
||Additive Manufacturing, Phase Transformations, Powder Materials