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Meeting MS&T22: Materials Science & Technology
Symposium Alloy Phase Transformations at Elevated Temperatures
Presentation Title Solidification Modelling With CALPHAD: Process Applications of Equilibrium and Non-equilibrium Models and When to Use Them
Author(s) Adam T. Hope, Ben Sutton
On-Site Speaker (Planned) Adam T. Hope
Abstract Scope Solidification is an essential part of many manufacturing processes, and rarely proceeds under conditions of thermodynamic equilibrium. Mass and heat transport near the solid-liquid interface control solute segregation as the microstructure evolves. This impacts the solidification temperature range, formation of secondary phases, and residual solute segregation in the solid. Many models exist to predict both equilibrium and non-equilibrium solidification behaviour using CALPHAD-based tools. Model selection depends on the alloy chemistry and process parameters surrounding a given solidification process. For example, the rapid solidification of laser based fusion processes can necessitate the use of solute trapping models, which have recently been coupled with CALPHAD. Conversely, the slower cooling of casting warrants consideration of back-diffusion in the solid. This presentation will outline the various CALPHAD-based solidification models, and discuss when each should be applied using industry focused case studies.

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Additive Manufacturing Design of Metal Matrix Composites of Stainless Steel 316 and Inconel 718
Alternate Phase Transformation Paths in a Nb-50Ti Alloy in the Presence of Oxygen Interstitials
Develop Precipitation-Strengthened Refractory High Entropy Alloys for Turbine Blades Applications above 1300 Degree Celsius
E-1: Multiscale Modeling of Solidification Processes for Metal & Alloys
Effect of Grain Boundary Phases on Creep Properties of a Novel Ni-Co Based Superalloy
Examining the Influence of Nitride Precipitation on the Performance of Additively Manufactured Nickel Superalloys
Hyper Duplex Stainless Steel: A Study on the Sigma Phase Formation
Impact of Manufacturing Processes on Phase Transformations in High-temperature Alloys: Some Thoughts Based on Representative Case Studies
In-situ Neutron Characterization of Thermomagnetic Processes Utilizing Direct Induction Heating
Metallic Alloy Microstructure Prediction and Control with Processing
Microstructure and Mechanical Properties of W-free γ + γ' Co-based Superalloys with Ni, Cr, and Fe Additions
Microstructure Evolution and Mechanical Properties of α′/α″-Strengthened Ferritic Superalloys
On the Shapes of Time-Temperature-Transformation Curves across Alloys and Reactions
Phase Stability in Cast and Additively Manufactured Al-9 wt%Cu-6 wt%Ce Alloy
Precipitation Strengthening in BCC Al2.7CrMnTiV High-Entropy Alloys
Precursor Metastable Phases and Their Influence on α Precipitation in the Metastable β-titanium Alloy, Ti-5Al-5Mo-5V-3Cr
Single-step Aging Treatment on Cast Haynes 282 Ni-based Alloy – Microstructure and Mechanical Behavior
Solidification Modelling With CALPHAD: Process Applications of Equilibrium and Non-equilibrium Models and When to Use Them
Study of Thermal Decomposition of γ’-Fe4N Using Molecular Dynamics Simulation
The Optimization of Local Phase Transformation Strengthening in Next Generation Superalloys
Thermal Stability and Time-temperature-transformation Diagrams of Co-rich Nanocomposite Ribbons
Tracking Changes in Microstructure and Mechanical Properties of Electron Powder Bed Fusion Produced Inconel-738

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