|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing for Energy Applications IV
||Oxide Dispersion Strengthened Stainless Steel by Reactive Additive Manufacturing
||Houshang Yin, Jingfan Yang, Bingqiang Wei, Mukesh N. Bachhav, Jian Wang, Xiaoyuan Lou
|On-Site Speaker (Planned)
Oxide dispersion strengthened (ODS) stainless steel was synthesized via in-situ reaction during laser powder bed fusion (LPBF). Under the as-built condition, the material showed fine equiaxed grains and high-density nanoscale oxides in the size of 10-30 nm. Oxides were amorphous in nature with complex compositions. After heat treatment at high temperature, the additive-manufactured ODS stainless steel demonstrated excellent thermal stability. Grain growth and oxide coarsening were not observed. Oxides transformed to crystalline. ~33% increase in hardness was observed in the heat-treated sample as compared to the as-built one. Transmission electron microscope (TEM) and atom probe tomography (APT) were both utilized to understand the underlying strengthening mechanism and reaction kinetics.
||Additive Manufacturing, High-Temperature Materials, Mechanical Properties