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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 The Role of Precipitate Size Distribution and Morphology on Ni Superalloy Deformation Micromechanisms
Author(s) James Coakley, Muhammad Awais, Jonathan Cormier, Ke An, Neil D'Souza, Howard Stone
On-Site Speaker (Planned) James Coakley
Abstract Scope The initial microstructures of Ni superalloys differ depending on engine component and service conditions. The microstructures then evolve during engine operation with a concomitant evolution of material properties and deformation micromechanisms. In the current work, single crystal Ni superalloy CMSX-4 has been processed to represent four critical microstructures that arise in superalloys: (i) a unimodal gamma-prime size distribution used in blade applications; (ii) a bimodal gamma-prime size distribution used in disc applications; (iii) a rafted gamma-prime size distribution that arises during blade operating conditions; (iv) a bimodal gamma-prime size distribution with rafted gamma-prime and cooling gamma-prime. In-situ neutron diffractometry is utilized during low temperature tensile deformation in order to compare the strengthening and deformation micromechanisms across these very different microstructures, and will be presented.
Proceedings Inclusion? Planned:
Keywords High-Temperature Materials, Characterization, Mechanical Properties


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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