|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Advanced Characterization with Synchrotron, Neutron, and In Situ Laboratory-scale Techniques II
||Precipitate Evolution in DED 316L Stainless Steel Due to Solid State Thermal Cycling: A 3D synchrotron X-ray Nanotomography Study
||Steve Gaudez, Meriem Ben Haj Slama, Juan Guillermo Santos Macias, Eva Héripré, Mario Scheel, Manas V. Upadhyay
|On-Site Speaker (Planned)
Precipitation of oxides in stainless steels during an Additive Manufacturing (AM) process has been widely observed and reported in literature. A recent study by Upadhyay et al. Scientific Reports 11 (2021) 10393 has reported the presence of non-oxides in DED 316L steel. The current understanding of oxide and non-oxide precipitation is that these occur during rapid solidification of a material just after its deposition. However, precipitation kinetics simulations performed by Upadhyay et al. showed that precipitation can also occur during Solid-State Thermal Cycling (SSTC): a phenomenon occurring at every material point after its solidification and till the end of AM process. To understand precipitation kinetics during SSTC, micropillars were prepared from as-built AM 316L steel. They were subjected to SSTC using a novel laser-SEM installation. Between each SSTC, precipitates were mapped via 3D synchrotron X-ray nanotomography. A machine learning algorithm was employed to segment the precipitates and study their evolution.
||Additive Manufacturing, Characterization, Iron and Steel