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Meeting MS&T21: Materials Science & Technology
Symposium Advanced Characterization of Materials for Nuclear, Radiation, and Extreme Environments
Presentation Title Femtosecond Laser Induced Surface Damages in Tungsten and Tungsten Carbide in High Heat Flux Conditions
Author(s) Minsuk Seo, Shukai Yu, Venkatraman Gopalan, Leigh Winfrey
On-Site Speaker (Planned) Minsuk Seo
Abstract Scope Tungsten is a divertor material for the tokamak fusion reactor, and tungsten carbide could be a potential material. Tungsten and tungsten carbide were irradiated by high heat flux (59.6GW/m2) femtosecond laser with different angles (0, 30, 45, 60) up to ~5000 shots in ambient air to emulate surface damages by hypothetically synchronized edge localized modes (ELMs) and loss of vacuum accident (LOVA). The surface crater contained laser-induced periodic surface structure (LIPSS), grooves, and morphologies were changed by laser influence spatially and angularly. The periods of low spatial frequency LIPSS (LSFL) have increased, and high spatial frequency LIPPS (HSFL) has decreased for both tungsten and tungsten carbide surfaces as the incident angle increased. The high-temperature surface oxides were detected by linear energy dispersive spectroscopy (EDS). The possible oxide forms are tungsten oxide, cobalt oxide, or cobalt tungstate, all potentially detrimental to nuclear fusion operation.
Proceedings Inclusion? Undecided

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Closer Observation to the Precipitation Behavior of Proton Irradiated Dual Phase 308L Weldment Filler Materials
Characterization of Defects, Thermal Transport, and Elastic Properties in As-fabricated and Irradiated Single Crystal of ThO2
Characterization of Materials Exposed to Coupled Nuclear Environments Using Positron Annihilation Spectroscopy and Electrical Impedance Spectroscopy
Characterizing the Spatial and Temporal Evolution of Iron Thin Films during Coupled Irradiation and Corrosion
Correlated Scattering and Microscopy Techniques for In-situ and Ex-situ Rapid Clustering Determination in Activated Materials
Deep Learning Pipeline for Cavity Segmentation in Transmission Electron Microscopy
Development of In-situ Atomic Scale Defect Spectroscopy during Ion Irradiation
Effect of Dilute Magnetism in a Topological Insulator
Effect of Ion Irradiation on the Corrosion of 304SS in PWR Simulated Water Chemistry
Effects of He on Nanoscale Mechanical Properties of Er
Europa Lander Contamination Control: Materials Testing and Numerical Simulation in a Flight Like Environment
Femtosecond Laser Induced Surface Damages in Tungsten and Tungsten Carbide in High Heat Flux Conditions
Finding a Balance in FeCrAl Alloys: Utilizing Advanced Characterization, Testing, and Machine Learning to Balance Properties
High Temperature Mechanical Properties of WC/W2C Composites Fabricated by Reactive Sintering of Powders Colloidally Processed
Imaging Nanostructural Heterogeneities and Vacancy Supersaturation in Ni-20Cr after Corrosion in Molten Salt
In-situ Radiological Containment Sample Environments: A review of Capability and Compromises at X-ray and Neutron Sources
In Situ Ion Irradiation of Gadolinium Titanate: A Perspective on Microstructure and Memory
In Situ Transient Grating Spectroscopy for Rapid Radiation Tolerance Characterization
Insight into the Impact of Irradiation on Vibrational Properties of AlN Using Raman Spectroscopy
Material Degradation Pathways of UO2 under Oxygen, Humidity, and Temperature Probed by XAFS
Microstructural Characterization of Oxidized Tristructural Isotropic Particles (TRISO) in Various Gas Atmospheres
Modeling of Graphite Oxidation in Water Vapor Ingress Accidental Conditions for High Temperature Gas-cooled Reactors
Moduli Measurements of Fuels and Cladding Materials via Resonant Ultrasound Spectroscopy
Now On-Demand Only - Multi-scale Characterization of Silicon Carbide Oxidation
Optical Characterization of Defects in Proton Irradiated Fluorite Oxides
Prediction Thermo-physical Characteristics Nickel-based Superalloys Directional Crystallization
Radiation Damage Suppression in AISI-316 Steel Nanoparticles: Implications for the Design of Future Nuclear Materials
Real-time Thermal Oxidation Process of PFM Tungsten Under Fusion-relevant Conditions Revealed by In-situ Environmental TEM
Revealing Hidden Defects via Stored Energy Measurements of Radiation Damage
Richtmyer-Meshkov Instability Testing and Accompanying Analysis: A Surface Sensitive Approach to High Strain Rate Testing of Irradiated Material without Bulk Volumes
Speciation of Metal Ion Solutes in Molten Salt Matrices for Reactor Applications using Advanced Spectroscopy Techniques
Successful, Unsuccessful, and Partially-successful Attempts at Understanding Alloy Corrosion in Molten Salts
Tensile Performance of Diffusion Bonded AA6061-AA6061 Cladding-Cladding Interface for Application in U-10Mo Monolithic Fuel Plates
The Effect of Rotary Swaging on Zirconium Alloys and its Microstructure Property Correlation
Uncovering the Effect of Grain Boundary Dopants on Irradiation Induced Grain Growth Through In Situ Microscopy
Unraveling Solute-solvent Interactions in Molten Salt Environments Using X-ray Absorption Spectroscopy
Utilizing a Dynamic Segmentation Convolutional Neural Network for Microstructure Analysis

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