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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Microstructural Templates Consisting of Isostructural Ordered Precipitate / Disordered Matrix Combinations: Microstructural Evolution and Properties
Presentation Title Novel Nickel-based Alloys for High Temperature Structural Applications
Author(s) Boateng Twum Donkor, Sonali Ravikumar, Anurag Sharma, Jie Song, Vijay K. Vasudevan
On-Site Speaker (Planned) Vijay K. Vasudevan
Abstract Scope Molten chloride and fluoride salt fast reactors (MSR) are under active development because they offer several operational and safety advantages over other types of reactors. Modern designs require structural materials with superior corrosion, creep, thermomechanical fatigue, irradiation damage and Helium bubble and tellurium-induced grain boundary embrittlement resistance to high temperatures of 750-950C. Nickel-base alloys generally perform better than all other alloys studied to date, though none yet have the set of properties to meet these demanding conditions. We will report on the development of the next generation of nickel-base alloys based on the Ni-Mo-W-Cr-X system that combine solid solution strengthening with ordered and other precipitates for superior high temperature properties. An ICME approach is combined with a detailed experimental processing, testing, characterization and modeling program. Results of the alloy design strategy, phase equilibria and transformations and evolution of microstructure and high temperature mechanical properties will be presented. The irradiation and corrosion behavior in molten chloride salt of selected alloys will also be presented. Future directions will be discussed.
Proceedings Inclusion? Planned:


Bcc-Superalloys Microstructure Templates: Tungsten to Titanium to Iron
Comparison of γ' and B2 Precipitates and Their Influence on the Mechanical Behavior of FeNiCoAl-based High-entropy Alloys
Core/Triple Shell Precipitates in Al-Er-Sc-Zr-(V,Nb,Ta) Alloys
Deformable Intermetallic Nanorods Leads to an Excellent Strength-ductility Combination in a High Entropy Alloy
Design of Precipitation Strengthened Metastable High Entropy Alloys
Free Energy Landscape, Transformation Pathway and Alloy Parameters Leading to Various Isostructural Ordered Precipitate Microstructures
High Temperature Deformation Pathways in Ordered L12- and Immm-based Compounds
Investigation of Nucleation Mechanisms Associated with the Formation of Coprecipitates in Ni-based Superalloys
Microstructural Engineering in NiCoCr Medium Entropy Alloys
Novel Nickel-based Alloys for High Temperature Structural Applications
On the Detailed Morphological and Chemical Evolution of Phases during Laser Powder Bed Fusion and Common Post-processing Heat Treatments of IN718
Optimizing Composition and Microstructure in Compositionally Complex Alloys Possessing bcc and B2 Mixtures
Precipitate Strengthening and Stabilization Mechanisms in Cast and Additively Manufactured Al-Cu-Mn-Zr Alloys
Precipitation of Ordered B2 Precipitates in BCC Al2.7CrMnTiV High-entropy Alloys
Seeing the Shearing of Short-range Order with Dislocations in the High-entropy Alloy
The Microstructural Design and Thermomechanical Processing of Compositionally Complex Alloys
The Origin and Stability of Nanostructural Hierarchy in Nickel-base Superalloys
The Role of Precipitate Size Distribution and Morphology on Ni Superalloy Deformation Micromechanisms
Tuning the Degree of Chemical Ordering in the Solid Solution of a Complex Concentrated Alloy and Its Impact on Mechanical Properties
Understanding the Role of Chemistry on Planar Fault Energies in A3B Compositions

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