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Meeting 2023 TMS Annual Meeting & Exhibition
Symposium Frontiers in Solidification: An MPMD Symposium Honoring Jonathan A. Dantzig
Presentation Title In Situ Synchrotron X-ray Diffraction Resolves the Transition from Ferritic to Metastable Austenitic Solidification in Fe-Ni-Cr Alloys
Author(s) Joseph W. Aroh, Seunghee A. Oh, S. Thomas Britt, Emma Barake, Andrew C. Chuang, P. Chris Pistorius, Anthony D. Rollett
On-Site Speaker (Planned) Joseph W. Aroh
Abstract Scope The transition from ferritic to metastable austenitic solidification in stainless steels has been the subject of many investigations due to its significant impact on the final microstructure. Traditionally, this phenomenon is interpreted through the lens of CALPHAD predictions at the freezing temperature and microstructural characterization at room temperature. However, without substantiating evidence of the phases that appear during solidification and subsequent cooling, it is possible to misinterpret the actual microstructural development history. For this reason, we employed a novel synchrotron x-ray diffraction technique with high spatiotemporal resolution to directly observe and quantify the evolution of phases and temperature during in situ laser melting and re-solidification of Fe-Ni-Cr alloys. The time-resolved diffraction patterns were correlated with post-mortem characterization of the re-solidified melt tracks and competitive growth kinetics modeling. These experiments were performed on a range of Cr/Ni ratios and cooling rates to provide a comprehensive understanding of this elusive phenomenon.
Proceedings Inclusion? Planned:
Keywords Solidification, Phase Transformations, Modeling and Simulation

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

About the Complexity of Using a ‘Simple’ Transparent Model Alloy to Study Peritectic Couple Growth in Microgravity
About the Solidification Path in Multicomponent Alloys: Multiphase-field Simulations versus Gulliver-Scheil
An Integrated Machine Learning and Phase-field Approach for Accurate Prediction of Dendritic Arm Spacing
Bridging between Glass-Crystal Growth in Organics and Rapid Solidification Effects in Metals
Computational Models of Microstructure and Thermal Distortion during Initial Solidification of Steel
Dealloying of Metals in Molten Salts – From Atomistic to Mesoscale Simulations
Design of Light Wind Turbine Parts by Simulation Based Machine Learning
Development of a Multi-phase-field Framework for Powder Bed Fusion Additive Manufacturing
Development of Phase Field Type Theories for Modelling Solidification Across Multiple Length Scales
Eutectic Growth Dynamics during Directional Solidification with Velocity Ramps: In-situ Investigations in Microgravity
Formation of Locked-lamellar Grains in a Slightly Hypereutectic Al-Al2Cu Alloy during Thin-sample Directional Solidification
Frontiers in Solidification - 2023
Graphite Microstructures within Solidified Hypereutectic Iron and Nickel Alloys
Growth Competition between Columnar Dendritic Grains under Additive Manufacturing Conditions
Growth Orientations and the Morphology of Dendrites
In-situ Measurements of Dendrite Tip Shape Selection in a Metallic Alloy
In situ Synchrotron Radiography Investigation of Graphite Nodule Evolution during Solidification in Ductile Cast Iron
In Situ Synchrotron X-ray Diffraction Resolves the Transition from Ferritic to Metastable Austenitic Solidification in Fe-Ni-Cr Alloys
In Situ Synchrotron X-ray Radio- and Tomography Analysis of Grain Boundary Formation during Directional Solidification of a Mg Alloy
In Situ X-ray Synchrotron Imaging Investigation of Solidification
In Situ X-ray Tomographic Investigations of Dendritic Patterns in a Co-base Alloy during Solidification
Kinetics Phase Diagram for Dendrite Tip Kinetics
Machine Learning Enhanced Operando Study of the Nucleation and Evolution of Complex Intermetallic Phases in Solidification
Measuring Key Phenomena in Solidification Using X-ray Imaging
Microstructural Evaluation of Containerless Solidification of Al-Ce Alloys
Microstructure and Crystallographic Texture in Twin-roll Casting of AA1050: Simulation and Industrial Validation
Microstructure Evolution during Solidification of Fe-C-Mn-Si Peritectic Steels
Modelling and Validating Solidification Kinetics during Additive Manufacturing
Modelling of Interface Evolution in Advanced Welding (Mintweld)
Molecular Dynamics Simulations of Solid-liquid Interfaces: A Progress Report
Mutual Translations between Fundamental Knowledge and Industrial Practice in the Field of Al Alloys Solidification and Casting
N-11: Development of a Data Assimilation System that Integrates Phase-field Simulation and In-situ X-ray Imaging in Dendrite Growth
N-12: Effect of Process Transients on Fall-in Material Behavior in Vacuum Arc Remelting
N-13: Fundamental Study on Nanoparticles Enhance Fluidity of Aluminum Alloys
N-14: Modelling Three-dimensional Microstructure Solidification Incorporating Interdependent Structural Mechanisms
N-15: Peering into Peritectic Microstructures in Three Dimensions
N-16: Physics-embedded Graph Network for Accelerating Phase-field Simulation of Microstructure Evolution in Additive Manufacturing
Nanoscopic View of Irregular Eutectic Solidification
Near-congruent Cu-Mn Bronze Produced with Ferro-manganese
New Insights in Controlling Freckle Defect Formation Using Magnetic Fields
Nucleation Burst in Additively Manufactured Inconel 718
Observation of Growing Dendrites by Time-resolved Tomography and Image Processing Using a Phase-field Model
Phase-field Model for Non-equilibrium Solidification
Phase-field Simulations of Peritectic Coupled Growth
Phase Field Study Rapid Solidification during Additive Manufacturing of SX Sample
Quantitative Phase-field Modeling of Alloy Solidification Far from Equilibrium: New Insights into Absolute Stability and Banded Microstructures
Rationalization of the Modelling of Stress and Strain Evolution in Powder Bed Fusion Additive Manufacturing – A Perspective from a Background in the Simulation of Casting Processes
Regular Fluctuation Cooling as an Alternative Crystal Growth Route to Control the Microstructure during Peritectic Solidification
Scaling Analysis In Solidification Process Modeling
The Development of Grain Structure During Additive Manufacturing
The Impact of Melt Flow on Solidification Patterns in a Ternary Ga-In-Bi Alloy
Tomographic Analysis of Microstructure Evolution in Ternary Al-Cu-Ag Eutectic

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