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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Environmental Degradation of Additively Manufactured Alloys
Presentation Title Sensitization of Austenitic Alloys Made by Laser Powder Bed Fusion
Author(s) Jingfan Yang, Laura Hawkins, John Snitzer, Xiang Liu, Miao Song, Lingfeng He, Xiaoyuan Lou
On-Site Speaker (Planned) Jingfan Yang
Abstract Scope This talk gives an overview of the current understandings of sensitization behavior of Alloy 800H and 316L stainless steels that are manufactured by laser powder bed fusion additive manufacturing (AM). The degree of sensitization (DOS) and carbide evolution will be discussed as the function of temperature, time, and microstructure. Different from conventional cast/wrought materials, the fast laser solidification resulted in non-equilibrium heterogeneous microstructures, including hierarchical boundary structures, ultrafine dislocation structures, and inhomogeneous element segregation, which further impact elemental diffusion, carbide nucleation and growth kinetics. AM austenitic alloys exhibited different sensitization/desensitization kinetics and corrosion behavior as compared to their wrought counterparts. The underlying sensitization mechanisms, including transport phenomena and carbide precipitation at elevated temperatures will be discussed. The mechanistic explanation focuses on the roles of dislocation cellular structures, boundary types, and carbon level.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing, Environmental Effects, Iron and Steel

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

AM Stainless Steel 316L in Corrosive Environment: Features Controlling Pitting and Metal Dissolution
Corrosion of Additively Manufacture Magnesium Alloys
Corrosion Properties of AM A20X
Effect of Oxygen on Corrosion Resistance of Stainless Steel 316L Prepared by Powder Bed Fusion
Effect of Post Processing Treatments on Corrosion Behavior of Laser Powder Bed Fusion(LPBF) 7050 Aluminum Alloy
Environmental Susceptibility of EBM Ti-6Al-4V as a Function of Print Direction in Seawater
Exploring the Stress-corrosion Cracking Susceptibility of Additively Manufactured 316L in Boiling Magnesium Chloride
High Temperature Oxidation of Additively and Conventionally Manufactured Heat Resistant Steel: HK30Nb
How Part Surfaces Influence Corrosion for a Laser Powder Bed Fusion 316L Stainless Steel
Hydrogen Trapping at Grain Boundaries and Dislocation Structures in Additively-manufactured Stainless Steel 316L Evaluated via SIMS/EBSD
Impact of Chemistry and Microstructure on Corrosion Properties of Designed High-performance Stainless Steel Powder for Additive Manufacturing
Long-term High-temperature Oxidation Performance of Inconel 625 Processed by Laser-assisted Additive Manufacturing
Metal Dusting Resistance of Additively Manufactured Ni-based Alloys: Influence of Post-processing Surface and Heat Treatments
Microstructure and Corrosion Behavior of 309L Stainless Steel Clad onto Carbon Steel Using Wire-fed Directed Energy Deposition
On the Heating Rate Dependent Oxide Formation and Evolution on Laser-based Directed Energy Additively Deposited IN718
Pulsed Transient High Heat Flux Testing of Coated Alloys in Extreme Environments
Sensitization of Austenitic Alloys Made by Laser Powder Bed Fusion
Surface Finishing Effects on the Corrosion Properties of Additively Manufactured 316L Stainless Steel
Transpiration Cooling of Additively Manufactured Porous Metallic Structures in High Heat Flux Environments
Tribo-corrosion Degradation of Additively Manufactured Multi-principal Element Alloy.

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