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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Accelerated Materials Evaluation for Nuclear Application Utilizing Test Reactors, Ion Beam Facilities and Integrated Modeling
Presentation Title Mechanical Properties, Damage and Morphology Details of Nanocrystalline and Ultrafine Tungsten Materials Exposed to Low Energy Helium and Heavy Ion Irradiation
Author(s) Osman El-Atwani, Erika Esquivel, Mert Efe, Jordan Weaver, Jason Trelewicz, Nathan Mara, Stuart Maloy
On-Site Speaker (Planned) Osman El-Atwani
Abstract Scope Nuclear materials will be exposed to irradiation doses that can alter the mechanical properties of the materials and change their morphology. Among the solutions proposed to mitigate this irradiation damage is the use of ultrafine and nanocrystalline materials of high grain boundary density. Here, we present detailed in-situ and ex-situ irradiation studies on nanocrystalline and coarse grained tungsten exposed to helium and heavy ion irradiation. Challenges in quantifying the irradiation damage though conventional methods (eg. loop or bubble density measurements) are presented based on quantification outputs on different materials irradiated at different conditions. Nanomechanical property measurement is then introduced to quantify the irradiation damage by correlating mechanical property changes after irradiation with morphology which permitted distinguishing irradiation hardening from bubbles and interstitial loops. The effect of bubble loaded grain boundaries in nanocrystalline materials is presented which showed softening effect and detrimental changes to the mechanical properties.
Proceedings Inclusion? Planned: Supplemental Proceedings volume


3D Study of Neutron-irradiated Fe-9Cr Alloy and 316 Stainless Steel Using Far-field and Near-field High-energy X-ray Diffraction Microscopy
A Heterogeneous Cavity Nucleation Model for Swelling in Simulated Ferritic Alloys
Accelerated Advanced Nuclear Materials Development at LAMDA through the NSUF Mechanism
Accelerated Materials Evaluation of Damage Mechanisms in Concentrated Solid Solution Alloys
Atomistically-informed Cluster Dynamics Modeling of Defect Cluster Evolution in Irradiated Structural Materials
Carbon Contamination in Ferritic/Martensitic Steels during Ion Irradiation: Characterization and Mitigation
Characterizing Displacement Cascade Damage via Virtual Diffraction Techniques
Characterizing the Defect Structure and Defect Density in Neutron and Proton Irradiated Zr Alloys by X-ray Line Profile Analysis
Deconvolution of Complex Environmental Effects Active in Nuclear Reactor Materials Through In-situ Ion Irradiation
Dislocation Loop Formation in Proton Irradiated Pure Zirconium
Effect of Alloying Elements on Defect Evolution in Ni-20X Concentrated Binary Alloys
Effect of Friction Stir Welding on Microstructure Evolution on In Situ and Ex Situ Self-ion Irradiated MA956
Effect of Irradiation Dose Rate on Precipitation in Fe-Cu and Fe-Cu-Mn Model Alloys
Effect of Temperature and Helium on Microstructure Evolution in Dual Ion Irradiated HT9 Steel
Enhanced Dynamic Recovery of Radiation Damage in Silicon Carbide under Accelerated Testing Using Ion Beams
F-10: Swelling Quantification of High Dose Helium Implantation in Different Materials Using a Helium Ion Beam Microscope
F-11: The Role of Oxides in Nanostructured Ferritic Alloys and Fe-Y2Ti2O7 Bilayers: Interfaces, Helium Partitioning and Bubble Formation
F-1: Current Status of In-situ Tritium Measurements from TMIST-3A
F-2: Dose Effect on the Irradiation Induced Loop Density and Burgers Vector in Ion-irradiated Alloy T91 Irradiated In-situ in a TEM
F-3: Grain Boundary Influence on Displacement Cascades in ZrC
F-4: In Situ TEM study on the Radiation Response of Nanotwinned-nanovoid Cu
F-5: Investigation of Helium-Defect Interactions in Tungsten through Coordinated Modeling and Experiment
F-6: Irradiation Response of Twin Boundaries in Face-centered Cubic Metals with Low Stacking Fault Energy
F-7: Radiation Response in Single-phase Concentrated Solid Solution Alloys
F-8: Self-organization of Helium Precipitates into Elongated Channels within Metal Nano-layers
F-9: Studying the Influence of In Situ Proton Irradiation on Corrosion in Molten Salt
High-dose Neutron Irradiation Induced Evolution of Mechanical Properties and Microstructure of Ferritic/Martensitic Steels
Impact of Irradiation-Enhanced Diffusion on Implanted Ion Profiles
Impact of Temperature on Microstructural Features using Dual Ion-irradiation in T91 Steel
Ion and Neutron Irradiation Effects in a Co-free High Entropy Alloy
Irradiation Responses of Ultrastrong Nano Precipitation Martensite Steel at Elevated Temperatures
Irradiation Temperature Influence on Nanolayered Response in Select MAX Phase Ceramics to High Fluence Self-ion Irradiation
Linking RIS and Grain Decohesion Using In Situ TEM 4-point Beams
Localized Helium Implantation Utilizing a Helium Ion Beam Microscope to Evaluate Swelling and Mechanical Property Changes
Mechanical Properties, Damage and Morphology Details of Nanocrystalline and Ultrafine Tungsten Materials Exposed to Low Energy Helium and Heavy Ion Irradiation
Microstructural and Nanoindentation Properties of a Lanthanum-containing Nanostructured Ferritic Steel Irradiated by High Dose Iron Ions
Microstructural Characterization of the Processes, Stability, and End-of-range Effects in Heavily Irradiated Pyrochlores
Microstructural Evaluation of Ion Irradiated Model Binary Alloys
Microstructural Investigations of Temperature Effects in Reactor Pressure Vessel Steels from the UCSB ATR-2 Irradiation
Microstructure Evolution in BOR60 Irradiated T91
Modeling and Validation on Role of Stoichiometry on Degradation in Ni-Cr Alloys for Nuclear Applications
Neutron Re-irradiation and Neutron-ion Irradiation Bootstrapping Approaches to Study Very High Dpa and He Effects in Nuclear Materials
Quantifying Radiation Damage in Materials Using Stored Energy Fingerprints
Self-Organization of Gas Bubble Superlattices
Simulation and Experimental Investigation on the Applications of Nonlinear Ultrasonic Techniques in Non-destructive Probes of Nuclear Materials
Simulation of Impact Toughness with the Effect of Temperature and Irradiation in Steels
TEM with In Situ Ion Irradiation of Nuclear Materials at the IVEM-tandem
Temperature Shift for Emulating Solute Cluster Evolution Using Higher Dose Rate Irradiation
The Influence of Bimodal Cavity Distributions on Swelling Evolution in Helium Pre-implanted T91
The Structure and Composition of Mn-Ni-Si Precipitates in an Irradiated High-Ni RPV Steel Following Aging at 425C for 57 Weeks
Towards In-situ Thermo-mechanical Property Monitoring during Ion Irradiation
Using Ion Irradiation to Extend the Damage Level of Neutron Irradiated 304L Stainless Steel
Void Swelling Evolution and Radiation-induced Segregation & Precipitation in Self-ion Irradiated Ferritic/Martensitic HT9 Steel

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