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Meeting 2023 TMS Annual Meeting & Exhibition
Symposium Advanced Characterization of High-temperature Alloys: Phase Evolution during Manufacturing and Service-induced Deformation
Presentation Title High temperature creep properties along concentration gradients in superalloys
Author(s) Lukas Haussmann, Steffen Neumeier, Mathias Göken
On-Site Speaker (Planned) Lukas Haussmann
Abstract Scope A high temperature indentation creep approach with a 20 µm cylindrical flat punch has been developed to allow creep measurements on the micrometer scale. We have used this technique combined with a newly developed 1D positioning system, to investigate the concentration gradients of a Co-Ni diffusion couple and a multinary CoNi-base superalloy diffusion couple with increasing Cr content. This approach allows the microstructural and mechanical characterization of many alloy compositions in only one sample. For the Co-Ni diffusion couple it could be shown, that the creep strength at 550°C and the hardness increase up to 50Ni-50Co due to an increasing solid solution hardening. In the Co-base superalloy diffusion couple, a significantly increased content of Cr leads to additional tertiary phases and a decrease of γ′ volume fraction. However, hardness measurements and indentation creep experiments reveal an optimal Cr content for the best hardness, creep and oxidation properties.
Proceedings Inclusion? Planned:
Keywords Characterization, High-Temperature Materials, Mechanical Properties

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

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Advanced Characterization of centrifugally cast HP40 reformer tubes
Advanced Characterization of High Performance Refractory Stainless Steels for High-temperature Corrosive Environments
An in-situ elevated temperature investigation of plasticity and damage evolution in a Ni-based superalloy
Cast nickel-base superalloy chemistry design for subsequent processing
Characterization of deformed structures in γ′ containing superalloys
Comparison of laboratory-generated and ex-service fractography for a 4th generation single crystal Ni-based superalloy
Continuum Scale Approach to Characterization and Modeling of Deformation Mechanisms in Haynes 244 Alloy
Creep assisted phase transformation deformation mechanisms in polycrystalline Ni-based superalloys and their impact on the creep performance
Effect of Machining Processes on the Perceived Mechanical Properties of Tantalum Refractory Alloys
Effect of Temperature, Stress and Environment on Preferential and Internal Oxidation of Ni-base alloys
Effects of Heat-Treatment on the High-Temperature Wear Behaviors of Additively Manufactured Inconel 718
Evolution of γ′ precipitate in HAYNES 282 during ageing: growth and coarsening kinetics
Grain Boundary Microstructure Optimization in Ni-Co-based Wrought Superalloys
High-resolution characterization of grain boundary precipitates and their interfaces in Ni-based superalloys with B and C additions
High temperature creep properties along concentration gradients in superalloys
In situ high energy diffraction investigation of the dynamic and meta-dynamic recrystallization of Ni base superalloy Haynes 282
Influence of Local Thermal History during Laser Powder Bed Fusion Additive Manufacturing on Solidified Microstructure and Phase Transformations during Subsequent Heat Treatment
Leveraging Local Phase Transformation Strengthening to Achieve Superior Next Generation Superalloys
Microstructural characterization of cost-effective Inconel 738LC superalloy after tensile deformation at various temperatures
Microstructural control of LPBF Inconel 718 through post processing of intentionally placed AM discontinuity distributions
Microstructure evolution and deformation micromechanisms in refractory high entropy superalloys
Microstructure Evolution and Mechanical Properties of α′/α″-Strengthened Ferritic Superalloys
Monotonic mechanical behavior of a nickel-based single crystal superalloy with a bimodal precipitation
Phase- and orientation-specific mechanical response during high-temperature deformation of a γ' strengthened Ni-based superalloy
Phase-Field Modeling of Rafting in Ni-Based Superalloys with a Varying Lattice Misfit
Quantifying Creep Deformation Behavior of Optimized Local Phase Transformation Strengthened Next Generation Superalloys
Segregation-assisted yield strength anomalies in superalloys
STEM/SEM study on the microstructural evolution and deformation mechanisms of Fe-25Cr-20Ni-1.4Nb-0.2C steel fabricated by laser powder-bed fusion
Superalloys by computational optimization: phase evolution and creep properties
Surface Integrity and Microstructural Characterization of Additively Manufactured Inconel 625 subjected to Shot Peening and Laser Peening
TEM Characterization of Tensile Behavior of Advanced Ni-based Single-crystal Superalloys
Temporal evolution of γ′ precipitate in HAYNES 282 during ageing: growth and coarsening kinetics, solute partitioning and lattice misfit
The role of Ru on the deformation mechanism of a single crystal superalloy during thermomechanical fatigue
Understanding phase evolution and deformation in high temperature materials via in-situ/operando neutron diffraction
Variations in γ′ formers and refractory elements for enhanced creep resistance and phase stability of alloy 282

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