About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
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Environmental Degradation of Additively Manufactured Alloys
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Presentation Title |
Impact of Chemistry and Microstructure on Corrosion Properties of Designed High-performance Stainless Steel Powder for Additive Manufacturing |
Author(s) |
Dana Frankel, Abhinav Saboo, Marie Thomas, Jason T. Sebastian |
On-Site Speaker (Planned) |
Jason T. Sebastian |
Abstract Scope |
The unique microstructures resulting from selective laser melting (SLM)-based additive manufacturing (AM) of 17-4 stainless steel can lead to significant differences in corrosion performance of the additively manufactured material compared to typical wrought 17-4. QuesTek has developed an integrated computational materials engineering (ICME)-informed modeling framework to predict AM 17-4 microstructure and properties, applying this framework to design a modified 17-4 alloy with enhanced reliability and performance in the as-built and direct-aged conditions compared to standard commercial 17-4 powders. The presentation will describe results from corrosion testing including potentiodynamic polarization, salt fog testing, and rising step load (RSL) to assess the general corrosion properties, pitting behavior, and stress corrosion cracking performance for the designed 17-4 custom powder AM builds, commercial 17-4 powder AM builds, and wrought 17-4 under different heat treatment conditions. Insights regarding the relationship between chemistry, microstructure, and corrosion performance in both AM and wrought material will be discussed. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, ICME, Iron and Steel |