|About this Abstract
|2023 TMS Annual Meeting & Exhibition
|Environmental Degradation of Additively Manufactured Alloys
|Small-Scale Mechanical and Corrosion Properties of Additively Manufactured Stainless Steel
|Xiaolei Guo, Yachun Wang, Eric Schindelholz, Gerald S. Frankel
|On-Site Speaker (Planned)
A unique feature of stainless steel (SS) prepared by laser powder bed fusion (LPBF) is the presence of a large amount of oxide inclusions in the as-printed alloy substrate. Thermodynamic calculations suggest that these oxides are metastable, so their size and distribution can continuously evolve over time. Therefore, the nucleation, growth, and aggregation of the oxides and their influences on the mechanical and corrosion properties of the alloys must be understood. This study aims at exploring the role of oxide inclusions on the mechanical properties of AM-SS 316L by leveraging the small-scale, in situ tensile testing capability developed in Idaho National Laboratory. This approach enables accurate examination of the effect of oxide inclusions on the mechanical properties of LPBF-produced SS, which would not have been possible otherwise due to the interference of the overwhelming effect of porosity. The as-printed alloys were also subjected to heat treatment and pitting corrosion studies.
|Additive Manufacturing, Characterization, Environmental Effects