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Meeting 2025 TMS Annual Meeting & Exhibition
Symposium Advances in Bcc-Superalloys
Presentation Title High Entropy Superalloys in Advanced Modular Reactors
Author(s) Cameron Yousefian, Alexander Knowles, Alex Cackett
On-Site Speaker (Planned) Cameron Yousefian
Abstract Scope High Entropy Alloys (HEAs) have greatly expanded the compositional space for alloy design and have been shown to be promising candidates for advanced nuclear applications due to their exceptional mechanical properties and predicted radiation resistance. This work investigates the viability of low neutron cross-section refractory High Entropy Superalloys (RHESAs) for nuclear cladding/structural components and explores the challenges faced when designing for a BCC superalloy structure. CALPHAD and first principle modelling were used to identify the RHESAs design space and selected compositions were manufactured by arc-melting, thermomechanical deformation, and heat treatments. Techniques including SEM, EBSD, EDX, TEM and diffraction were used to characterise the alloys with a focus on thermal stability and precipitate evolution in tandem with computational predictions. Neutron activation and cross section modelling for down-selected alloys tested their viability for next-gen nuclear fuel cladding applications.
Proceedings Inclusion? Planned:
Keywords High-Entropy Alloys, High-Temperature Materials, Nuclear Materials

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A comparison between Cr- and Fe-based superalloys strengthened by hierarchically structured precipitates
Advancing High-Temperature Structural Applications: Design and Manufacturing of BCC Refractory MPEAs via Additive Manufacturing Technologies
AlCoCrFeNi-Based High Entropy Superalloy Coating Applied onto the Surface of Al-Alloys
Atomistic simulation of dislocation behavior in a model BCC-B2 alloy using machine learning interatomic potentials
Atomistic simulations of Cr-Si alloys
Challenges facing the design of refractory BCC-B2 alloys for 3D printing
Characterisation of Ion-irradiated BCC Ferritic Superalloys for High-Temperature and Nuclear Applications
Design and Deformation of BCC – B2 Refractory Multiprincipal Element Alloys
Design and development of a light-weight and low neutron cross-section TiZrNbV high-entropy alloy with room temperature tensile plasticity
Design of novel intermetallic reinforced nano-structured steels for nuclear
Development of novel intermetallic dispersion strengthened steels
Development of (relatively) low cost refractory-ruthenium based superalloys (RRSs).
Enhanced creep resistance influenced by lattice strain fields and grain boundary sliding of Mo-doped ferritic medium entropy superalloys
Evolution of the BCC + B2 microstructure and its high temperature stability in refractory high entropy alloys (INVITED TALK)
High-Temperature Evolution of Irradiation Defects in WTaCrV Refractory High-Entropy Alloy for Nuclear Fusion Applications
High Entropy Superalloys in Advanced Modular Reactors
High temperature deformation of precipitation-strengthened refractory high entropy alloys
High temperature environmental degradation of novel Fe-based BCC Superalloys
High temperature mechanical and irradiation response of a eutectic refractory alloy
Identification of the B2 Phase in the TaRe Binary BCC Phase Field via Multiscale Characterization Techniques and Neutron Diffraction
In situ studies of bcc and fcc phase formation and transformations in high-entropy alloys by using electromagnetic levitation and ultrafast high-energy XRD
Interaction of Cr-Si-Base Alloys with Ceramics at High Temperatures
Investigation of nano-scale phase separation in refractory high entropy alloys using complementary techniques
Mechanical and Environmental behaviour of novel Cr(Fe)-NiAl bcc-Superalloys tailored for high temperature applications
Mechanical properties and deformation mechanism of cast and additively manufactured NiAl-CrMo in-situ composites
Mechanical properties of an A2/B2 refractory superalloy (RSA) and its constituent phases
Microstructure Evolution and Mechanical Properties of A2/L22-Strengthened Ferritic Superalloys
Recent improvements in BCC-based alloy prediction capabilities in Thermo-Calc software and databases
Room Temperature Tensile Ductility in a Cr-based Alloy
Semi-ordered B2 phase in a high entropy refractory Nb-Ti-Zr-Al-V alloy
Stability and Slip Mechanisms of B2 Phases in Refractory Alloys
Stability of Undesired AlxZry Ordered Omega Phases in Al-Containing Refractory High Entropy Superalloys
Thermodynamics and Phase Transformation Pathways in BCC-B2 Refractory Superalloys
Tungsten-Based BCC Superalloys for Nuclear Fusion
Understanding Refractory Metal High Entropy Superalloys through systematic design

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