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Meeting 2025 TMS Annual Meeting & Exhibition
Symposium Environmental Degradation of Additively Manufactured Materials
Presentation Title High Temperature Oxidation of Ni-Based Superalloy 247 Processed by Electron Beam-Powder Bed Fusion Additive Manufacturing
Author(s) Karthikeyan Hariharan, Oswaldo Luengas, Christopher H. Zenk, Sannakaisa Virtanen
On-Site Speaker (Planned) Karthikeyan Hariharan
Abstract Scope Ni-based superalloy 247 is a cast γ’-strengthened superalloy known for its excellent creep and oxidation resistance at elevated temperatures. Recently, Ni-based superalloy 247 was optimized for electron beam-powder bed fusion (EB-PBF) by mitigating crack susceptibility during processing. In this work, we assess the high-temperature oxidation behavior of EB-PBF-247 with different grain structures using isothermal oxidation tests and post-mortem characterization at 700,900 and 1100oC. The isothermal oxidation tests show that change in grain structure from hybrid columnar-equiaxed to fully columnar enhances the oxidation kinetics at 1100oC, while the effect diminishes at lower temperatures. However, the internal oxidation is well pronounced in the low mass-gain hybrid alloy in comparison to the columnar alloy, irrespective of the test temperature. The findings are discussed in terms of the nature (structure and composition) of the oxide scales, processing-induced local microstructural variations, diffusion of oxygen and alloying elements in the alloy and oxide scale.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing, High-Temperature Materials, Environmental Effects

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Ablation Characterization of a Novel Additively Manufactured AlCeMo Alloy
Accelerated Additive Manufacturing Synthesis, Testing, and Characterization of High-Temperature Alloys for High-Throughput Environmental Degradation Resistance
Additive Manufacturing Technique to Achieve a Chemically Homogeneous Zinc/AA5456 Mixture to Arrest Corrosion Propagation
C-1: Microstructure and Corrosion Behavior of Ni-Based Coating Alloy
Corrosion Behavior of a Ni-Free Austenitic Stainless Steel Produced by Additive Manufacturing
Corrosion Fatigue Response of Laser Powder Bed Fused High Strength Steel
Corrosion Mechanisms of Additively Manufactured 316L Stainless Steels in Simulated Seawater
Effect of Microstructure Evolution on Hot Corrosion Resistance of P91&304 Graded Composition Transition Joint
Evaluation of Environmentally Assisted Cracking on Wire Arc Additively Manufactured (WAAM) AISI 316LSi
Exceptional Localized Corrosion Resistance of Ni-Based Alloy 625 Processed by Directed Energy Deposition Additive Manufacturing in Concentrated Chloride Environments
High Temperature Oxidation of an ODS NiCr Additive Manufactured Alloy
High Temperature Oxidation of Ni-Based Superalloy 247 Processed by Electron Beam-Powder Bed Fusion Additive Manufacturing
Metal Dusting of Additively Manufactured Ni-Cu Alloys
Microstructural and Compositional Distribution Effects on LPBF CuNi Corrosion
Microstructure and Corrosion Behavior of a Friction Stir Additively Manufactured Al-Cr-Mn-Co-Zr I-Phase Alloy
On the Irradiation-Assisted Stress Corrosion Cracking of 316L Stainless Steel Made by Laser Additive Manufacturing
Oxidation of Al/Si-Coated Additive Manufactured 699XA Alloy
Spheroidization of Refractory Tungsten Metal Powder for Additive Manufacturing Using Inductively Coupled Thermal Plasma
Studying Microstructure and Stress Corrosion Cracking of an Additive Friction Stir Deposition Processed aa7075 Aluminum Alloy
The effect of Microstructure and Heat Treatment on the Oxidation Behavior of Additively Manufactured 316H Alloy
Understanding the Influence Processing on LPBF Cu-30Ni Corrosion in Flowing Chloride Environments
Understanding the Interplay Between Dislocation Slip, Hydrogen Clustering, GB Cavitation and Cracking in Hydrogen Embrittlement Through Atomistic-to-Mesoscale Simulations
Utilizing a Hot-Isostatic Pressing Controlling Pore Defect in Direct Energy Deposited CoCrNi Medium-Entropy Alloy and Its Mechanical Stability at Liquid Helium Temperature
Wear-Enhanced Corrosion of Compositionally Varying AM Stainless Steels

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