|About this Abstract
|2023 TMS Annual Meeting & Exhibition
|Phase Transformations and Microstructural Evolution
|Tracking Precipitate Evolution in an AM 316L Steel during Solid-state Thermal Cycling: A 3D Synchrotron X-ray Nanotomography Study
|Steve Gaudez, Meriem Ben Haj Slama, Lluis Yedra, Eva Héripré, Mario Scheel, Hakim Gharbi, Simon Hallais, Manas 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. Until recently, oxide and non-oxide precipitation was understood to occur during rapid solidification during AM. Recently, 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 DED 316L steel. They were subjected to SSTC inside a vacuum chamber. Between each SSTC, precipitates were mapped via 3D synchrotron X-ray nanotomography. A machine learning algorithm was employed to segment precipitates and study their evolution.
|Additive Manufacturing, Characterization, Other