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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Refractory Metals
Presentation Title Nanostructured Tungsten Alloys for Nuclear Fusion
Author(s) Neal Parkes, Alexander Knowles, Chris Hardie
On-Site Speaker (Planned) Neal Parkes
Abstract Scope Nuclear fusion offers a utopian vision for large-scale low-carbon energy production. Although great progress has been achieved on the underpinning plasma physics, engineering materials are increasingly the limiting factor. Tungsten is the leading candidate for the first wall and divertor for its high melting point and sputtering resistance. However, tungsten’s low ductile to brittle transition temperature (DBTT) and poor irradiation tolerance makes its use a major issue. One approach to improve its mechanical properties is through nanostructuring and grain refinement. Here we explore novel tungsten alloys that exploit phase decomposition to create nano-sized precipitates and grains. Alloys produced through arc melting and powder metallurgy methods, were characterised by EBSD, EDS and x-ray diffraction. Thermal heat treatments were applied to confirm the stable phases, and to promote phase decomposition & nanostructuring. The novel microstructural characterised are sought to gain improved radiation resistance, and mechanical properties at room temperature.
Proceedings Inclusion? Planned:
Keywords Nuclear Materials, Other, High-Entropy Alloys


Bending Creep Deformation of ODS MoLa with 0.6 vs 1.1 wt.%La
Design of BCC High-entropy Alloys with Low Neutron Absorption Cross-section
Design of MoWTaTiZr Refractory Multi-principal Element Alloys
Development of Heat-treatable Crss-Cr3Si-based Alloys: Microstructure, Oxidation, and Creep
Development of Novel Chromium-superalloys Strengthened by B2 Intermetallic Precipitates
Effect of Heating Rate and Substrate on the Oxidation Behavior of Hafnium Aluminum Diboride Thin Films
Flow Behavior and Associated Microstructures of Niobium at 1200 to 1500°C
Grain Boundary Doping as Effective Method to Improve Mechanical Properties in Ultra-fine Grained Tungsten
Grain Boundary Segregation Engineering in Technically Pure Molybdenum Examined via Three-point Bending Tests
High-throughput Engineering of Oxidation Behavior in Complex Refectory Alloys
NanoPhase Separation Sintering in Mo and Mo-W Based Systems
Nanostructured Tungsten Alloys for Nuclear Fusion
Oxidation Behavior of Mo-Si-B-Al Alloys at Elevated Temperature
Platinum-based Superalloys: Combating High Temperatures and Aggressive Environments
Realizing Sub-micron Tungsten and Tungsten Composite Microstructures via Deformable Punch Spark Plasma Sintering
Refractory High Entropy Alloys for Applications in Extreme Environments
Studies on the Phase Formation of Cobalt Contacted with Zinc Vapour
Sustainability-based Selection of Materials for Refractory High Entropy Alloys
Tensile Properties of Molybdenum & ODS MoLa Sheet at Elevated Temperatures
The Influence of Impurities on the Interfacial Chemistry of Niobium – Alumina High-temperature Refractories
Thermal Stability of Thin Rolled Potassium-doped Tungsten Sheets at Temperatures between 1100 C and 1400 C
Tungsten Grain Optimization and Composite Fabrication for Use in Fusion Reactors

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