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Meeting 2019 TMS Annual Meeting & Exhibition
Symposium Solidification Processing of Light Metals and Alloys: An MPMD Symposium in Honor of David StJohn
Presentation Title A Brief History of Grain Refinement
Author(s) Mark A. Easton, Ma Qian, Michael Bermingham, Peng Cao
On-Site Speaker (Planned) Mark A. Easton
Abstract Scope One of the key technologies in light metals solidification processing is how to control the grain size. A fine equiaxed microstructure has a number of benefits including the reduction in defects such as hot tearing and porosity size, improved homogeneity of properties and improved performance of post-processing operations. This presentation will discuss the development of the interdependence theory as a method for understanding and predicting grain size changes. It will also discuss how its application has led to a number of commercial applications including a reduction in the cost of grain refining additions in aluminium billets, the optimization of additions to Al-Si foundry alloys, the development of a magnesium grain refiner (microZir), understanding of grain refinement using ultrasonics, titanium grain refinement and most recently in additive manufacturing.
Proceedings Inclusion? Planned:


4D Synchrotron Imaging Insights into Grain Formation
A Brief History of Grain Refinement
A History of the Global Light Metals Alliance
Advanced Characterization of Precipitates in Light Alloys
Capability Through Collaboration: The Defence Materials Technology Centre
Composition Optimization and Solidification Behavior of Cast High Temperature Titanium Alloy
Compositional Templating for Heterogeneous Nucleation of Intermetallic Compounds
Controlling the Eutectic Microstructures of Mg based Alloys for Functional Properties
Corrosion Behavior of Mg, Al and Ti
Crystallography of Phase Transformations in Solids and its Applications
D-37: Analysis of the High Purity Aluminum Purification Process Using Zone-refining Technique
Deformation and Defect Formation in Partially Solid Alloys
Deformation Behavior of Magnesium Single Crystals
Developing Sustainable Metallic Materials through Industry and Research Collaboration
Directional Solidification to form Nanoscale Eutectic Microstructures in Al-Cu Thin Films
Effects of Si Macrosegregation of the Constitutive Behviour of A356
Four-phase Eutectic Topology in Solidification Rosettes
Grain Initiation Behaviour and Its Effect on Grain Refinement
Grain Refinement of Al-7Si through Addition of an Al-V-B Master Alloy
Grain Refinement of Aluminum: A Review and Unsolved Mysteries
Heterogeneities in Homogeneous Nucleation during Solidification of Pure Metals by Atomistic Simulations
Heterogeneous Nucleation in Peritectic Systems
Heterogeneous Nucleation Sequence at the Interface of TiB2 to Form Al
High Strength Ti-6Al-4V Composites by In Situ Generated Stable Nanoparticles
Hot Tearing in Magnesium Alloys
Identifying and Understanding the Influence of Columnar Beta-phase Boundaries on the Tensile and Fatigue Properties of Additively Manufactured Ti-6Al-4V Alloy
In Situ Observation of Hyperbranched Dendrites in Aluminum Alloys
In Situ Observation of Nanoparticle-enabled Diffusion Control by High-speed Synchrotron X-ray Imaging
Influence of AlN Nanoparticles on Creep Resistance of Elektron21 Alloy Prepared by Intensive Melt Shearing
Influence of Microstructure Evolution during Twin-roll Casting on the Properties of Magnesium Sheets
Measurements of Microstructure Evolution and Kinetics during Laser-induced Rapid Solidification of Al-based Alloys
Mechanisms of Primary Intermetallic Refinement by Ultrasonic Processing
Modelling of Shrinkage-induced Species Macrosegregation in A356 Aluminum Wheel Casting
Numerical Modeling of Heterogeneous Nucleation Behavior of Equiaxed Grains during Directional Solidification
Phase-field Studies of the Interplay between Nucleation and Growth in Light Metal Alloys
Porosity in Castings
Practical Experiences Using Knowledge to Solve Mysterious Problems
Predicting Microsegregation and Microstructural Evolution in Advanced High Pressure Die Cast Magnesium Alloys
Prediction of Hot Tearing “Down Under” the Root of Dendrites during Direct Chill Casting
Prediction of the Columnar to Equiaxed Transition in Bottom Cooled Aluminum Copper Cylinders
Promoting the Columnar-to-Equiaxed Transition and Grain Refinement of Ti alloys during Additive Manufacturing
Prospects for Magnesium as an Engineering Material
R & D of New Titanium Alloys In China
Recent Advances in Understanding Early Stages of Solidification
Revealing the Heterogeneous Nucleation and Growth Behaviour of Grains in Inoculated Aluminium Alloys during Solidification
Selective Laser Melting: Case Studies in Aluminium and Titanium Alloys
Simulating the As-cast Microstructure of an Al-2Cu Alloy Formed under Ultrasonic Treatment
Size Effects in Mg Alloys: Why Refinement is Well Worth It
Solidification of Aluminum and Magnesium Alloys: Modeling and Experiments
Study on the Hot Tearing Susceptibility of Mg-Gd Binary Magnesium Alloy
The CAST Cooperative Research Centre: Lessons for Research Collaboration
Thermodynamics of Carbon and Carbides for Grain Refinement of Mg-alloys
Twin-roll Casting of Mg Alloys
Understanding Compositional Effects of Dendritic Solidification via Directional Solidification and Cellular Automaton Simulation
X-Ray Synchrotron Radiography Investigations of Primary and Secondary Phase Nucleation in Aluminium Alloys
δ-γ transformation during / after δ dendritic solidification in Fe-C-Mn-Si alloys: time-resolved 2D / 3D imaging

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