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Meeting 2023 TMS Annual Meeting & Exhibition
Symposium Methods, Techniques, and Materials Discovery of Irradiation Effect Using In-situ Microscopy
Presentation Title Precipitate and Cavity Evolution in Alloy 718 Under High Temperature In-situ Ion Irradiation using Machine Learning
Author(s) Stephen Taller, Timothy Lach, Kai Sun
On-Site Speaker (Planned) Stephen Taller
Abstract Scope Ni-based superalloys are a candidate alloy class for advanced reactor applications because of their intrinsic creep resistance, corrosion resistance and high strength. Two Inconel 718 heats, one conventional and one additively manufactured, with high pre-existing precipitate densities were evaluated using in-situ dual ion irradiations up to 10 dpa using 1.17 MeV Kr ions with 400 appm He/dpa co-injected at 500-700°C at the Michigan Ion Beam Laboratory. HAADF images were collected continuously, and a dynamic segmentation convolutional neural network classified features in each image with several computer vision algorithms to track feature properties across frames. Pre-existing precipitates dissolved early (< 1 dpa) for all conditions. At 500°C, small cavities nucleated by 1 dpa, and phases with similar contrast to γ″ and δ emerged near 5 dpa. At 600°C and 700°C, both cavity nucleation and precipitate evolution were accelerated. The results are discussed in the context of rate theory modelling.
Proceedings Inclusion? Planned:
Keywords Nuclear Materials, Phase Transformations, Environmental Effects

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Advanced In Situ Mechanical Testing Approaches to Evaluate the Degradation of Nuclear System Components
Deep Learning Defect Detection in Electron Microscopy of Radiation Damage in Metals
Discovering the Mechanisms of Helium Channel Evolution Via In-situ Annealing and Observation in TEM
Effect of Stacking Fault Energy on Microstructural Evolution of Compositionally Complex Alloys under In situ Dual-beam Heavy-ion Irradiation
Evolution of Vacancy/Interstitial Dislocation Loops in Pure Zr and Ti at Elevated Temperatures Observed by In-situ TEM Annealing
Helium Effects on Defect Evolution of In-situ Irradiated Additive-manufactured Grade 91 Steel
High Throughput Assessment of Advanced Nuclear Materials via In-situ TEM
In-situ 3D High-energy X-ray Diffraction Study on Deformation Behavior of Neutron-irradiated Fe-9%Cr
Industrial Nuclear Materials Applications for In-situ Microscopy
Is a TEM Foil “Bulk Enough” to Study the Parabolic Air-ingress Oxidation of W PFM in In-situ Environmental TEM?
Laboratory-based 3D X-ray Imaging of Neutron-irradiated TRISO Fuel
Observations of ‘Far from Equilibrium’ Phenomena under in Reactor Thermal Conditions Using In Situ TEM
Particle-induced X-ray Emission Spectroscopy (PIXE) for In Situ Monitoring of Corrosion Under Proton Irradiation in the Irradiation-corrosion Experiment (ICE)
Perspectives on Quasi-in-situ Characterization of Nuclear Materials Using Synchrotron X-rays
Precipitate and Cavity Evolution in Alloy 718 Under High Temperature In-situ Ion Irradiation using Machine Learning
Quantifying the Recovery of Irradiated and Cold-worked Zr-2.5Nb Using X-ray and Neutron Diffraction Line Profile Analysis
Radiation Tolerance of Amorphous Alumina Cladding Coatings for Heavy Liquid Metal Cooled Fast Reactors: Temperature and Dose Effect.
Rare-earth Titanates Ln2TiO5 Crystal Chemistry and Radiation Response. A Review.
Revealing 3D Microstructures in Nuclear Materials with High-energy X-rays
Revealing Heat-treatment Induced Stoichiometric Variations in Neutron-irradiated Yttrium Hydrides Using In Situ Synchrotron Radiation Diffraction
Simultaneous Proton Irradiation Changes Molten Fluoride Salt Corrosion Rates and Mechanisms
Transient Grating Spectroscopy of Defect Annealing Kinetics and Microstructural Evolution in Self-ion Implanted Tungsten with In-situ Annealing
Uncovering Transient Grain Boundary Absorption States Using Deep Learning Object Detection
Understanding the Amorphization Limit in Irradiated Ceramics via Repeated In situ Recrystallization Experiments
Utilizing High-energy X-rays for Microstructural Characterization of Metallic Hydrides

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