About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Materials Design and Processing Optimization for Advanced Manufacturing: From Fundamentals to Application
|
Presentation Title |
Role of Interstitial and Minor Alloying Element Additions on Microstructural Evolution in Additively Manufactured Materials |
Author(s) |
Todd A. Palmer |
On-Site Speaker (Planned) |
Todd A. Palmer |
Abstract Scope |
Metal powders are the primary feedstock for fusion-based and solid state additive manufacturing processes and are prone to the pick-up of interstitial and minor alloying elements. While the primary alloying elements typically fall within acceptable ranges, minor alloying elements, such as nitrogen and oxygen, are typically not monitored. These elements impact the phases formed and microstructural evolution in a range of stainless steels and nickel base alloys in both the as-deposited and post-processed conditions. High oxygen levels in stainless steels lead to the formation of oxygen-rich inclusions originating in the powder and impacting microstructural formation, mechanical properties, and corrosion behavior in additively manufactured materials. In solid solution strengthened nickel base alloys, high nitrogen levels drive the formation of nitride-based phases in the as deposited condition and persist through post-processing. These phases differ from those expected based in wrought materials and drive significant changes in the microstructural evolution and resulting properties. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Powder Materials, Phase Transformations |