About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
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Symposium
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Computational Thermodynamics and Kinetics
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Presentation Title |
On the Competition Between Solute and Precipitate Strengthening: Effects on Creep Strength
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Author(s) |
Laurent Capolungo, Jobin Joy, Anjana Talapatra, andrea Rovinelli, Ricardo Lebensohn |
On-Site Speaker (Planned) |
Laurent Capolungo |
Abstract Scope |
Structural metals used for power generation applications are designed to withstand extreme environments (i.e., temperature, stresses, irradiation, oxidation) over extended periods of time. Striking ideal mechanical performance and longevity often boils down to optimizing the strengthening induced by solutes and precipitates. During service, the relative contribution of both strengtheners will necessarily evolve such that anticipating the true mechanical performance of complex alloys remains challenging. This study presents a constitutive model, leveraging the numerical efficiency of full-field spectral-based mechanical solvers, to predict the likely roles of precipitates (size, spatial distribution, density) and solutes on creep strength. The model is applied to conventionally processed austenitic and ferritic-martensitic steels and to additively manufactured systems. A Bayesian inference-based uncertainty quantification framework is used alongside the constitutive model to show that climb assisted glide of dislocations over precipitates can largely lead to a loss of strength at high temperatures. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, Modeling and Simulation, ICME |