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Meeting 2025 TMS Annual Meeting & Exhibition
Symposium Materials Aging and Compatibility: Experimental and Computational Approaches to Enable Lifetime Predictions
Presentation Title Bimodal Microstructure Modeling due to Non-Isothermal Loading in Ni-based Single-crystal Superalloys via Phase-field Method
Author(s) Emily Dunn, Jose Dominic, Jean-Briac le Graverend
On-Site Speaker (Planned) Jean-Briac le Graverend
Abstract Scope Nickel-based superalloys are of interest due to their thermomechanical performance in high-temperature settings. Unimodal γ/γ′ microstructures are observed for temperatures lower than 950C. For higher temperatures, a dissolution from 70% volume fraction occurs. Non-isothermal loading in that regime will lead to precipitation and form small precipitates (also known as tertiary precipitates) within the γ channels where dislocations propagate. This characterizes a bimodal microstructure. The evolution of these precipitates is particularly important because they will directly interfer with dislocations depending on their sizes and modify the thermo-mechanical behavior for a period of time. By modeling the evolution of the two types of precipitates via phase-field simulations, this will allow to better ascertain the role of precipitation on the macroscopic response and, therefore, during operating conditions.
Proceedings Inclusion? Planned:
Keywords High-Temperature Materials, Computational Materials Science & Engineering, Modeling and Simulation

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Mean-field Approach for High-temperature Shape Memory Alloys
Accelerated Aging and Lifetime Performance Predictions of Silicone Cushions Under Compression
Accelerated aging of aluminum alloys for long-term predictions of corrosion under atmospheric conditions of temperature and relative humidity
Accelerated oxidation of epoxy thermosets with increased O2 pressure
Accelerating Compatibility Assessments through Adoption of Selected-Ion Flow-Tube Mass Spectrometry (SIFT-MS)
Accelerating Computational Calculations of Galvanic Corrosion using Machine Learning
Bimodal Microstructure Modeling due to Non-Isothermal Loading in Ni-based Single-crystal Superalloys via Phase-field Method
Characterization of localized oxidation in tantalum and cracking susceptibility at high temperatures using Auger Electron Spectroscopy
Characterization of Long Term Service Effect on Turbine Blade Alloy
Environmentally assisted corrosion testing of 7xxx series aluminum to create an SCC susceptibility profile for temperature, humidity, and stress through accelerated testing.
High-throughput Creep Characterization for Use in Accelerated Aging Prediction
Impacts of aging additively manufactured silicone polymers in the presence of organic solvents
Kinetic assessments of TATB formulations after mild thermal aging
Materials Compatibility Testing and Assessment for Materials Reliability
Mechanical Performance, Aging, and Compatibility of Additive Manufactured Silicone Elastomers
Modeling Corrosion: Efficient Models and Validation for Long Term Degradation
Predicting compatibility and aging at the system-level with a Reaction, Sorption, Transport, and chemo-mechanics (ReSorT-M) model
Predicting Electrochemical Responses Using Machine Learning
Predicting Photo-Oxidative Embrittlement of a Semicrystalline Thermoplastic from Micromechanical Damage
Probing Bulk Mechanical Properties of Silicones Over the Course of Long-term Compressive Strain
Research on Shape Optimization of Work Roll in Hot Rolling
Strain-Controlled High-Cycle Fatigue of Aged Solder Joints for High-Reliability Environments
Towards High Throughput Materials Advancement: Thinking About Database Management in Our Studying-Polymers-on-a-Chip (SPOC) Platform

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