|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||2022 Technical Division Student Poster Contest
||SPG-39: Mechanical Behavior of a Next-generation Steel (AF9628) Printed via Directed Energy Deposition
||Ankita Roy, Ravi Shankar Haridas, Rajiv Mishra, B A McWilliams, Clara Mock, K C Cho
|On-Site Speaker (Planned)
Compared to conventional material processing techniques, wider solidification range of additive manufacturing (AM) provides opportunity to tailor heterogenous and hierarchical microstructures. Multiple AM systems are being simultaneously adopted by industry to leverage unique process dynamics associated with each AM technique. The relatively slower solidification kinetics associated with directed energy deposition (DED) has been found to improve strength-ductility synergy for a new class of high-strength low alloy steel (AF9628). DED method using high melt pool overlap rate provides an excellent medley of auto-tempering of the martensitic laths and optimizing volume fraction of carbides that results in the observed mechanical behavior. Our analyses involve venturing into the holistic influences of prior austenite grain size, solidification morphology, elemental segregation along cell boundaries and also exposing the role of carbides in shaping the mechanical properties of the alloy.
||Additive Manufacturing, Iron and Steel, Phase Transformations