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Meeting 2016 TMS Annual Meeting & Exhibition
Symposium Cast Shop Technology: An LMD Symposium in Honor of Wolfgang Schneider
Presentation Title Modification of Eutectic Si and Refinement of Eutectic Grain in Al-Si-Mg Based Alloys by CrB2 and Sr Addition
Author(s) Jiehua Li, Peter Schumacher
On-Site Speaker (Planned) Peter Schumacher
Abstract Scope Modification of eutectic Si by Sr addition has been widely investigated, however, the Sr addition depletes the AlP nucleation sites and a coarse eutectic grain is often accompanied with a high degree of porosity. In this contribution, a series of Al-10Si-0.2Mg (wt.%) based alloys with CrB2 and/or Sr additions have been investigated by thermal analysis, Thermo-Calc, optical microscopy, SEM, EPMA, EBSD, TEM and computer tomography. It was found that eutectic grains can be refined, due to the presence of CrB2 nucleation sites, instead of AlP, which is poisoned or depleted by Sr addition. Thus a refined eutectic grain and well modified eutectic Si was obtained. Furthermore, the number density of the porosity is also decreased and the distribution is located at the boundaries of eutectic grain. Improved mechanical properties, in particular elongation, were obtained. This investigation highlights the importance of refinement of eutectic grains and simultaneous modification by Sr.
Proceedings Inclusion? Planned: Light Metals Volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

35 Years of Contributions to Cast Shop Research and Development – Honoring Prof. Dr. Wolfgang Schneider
A Comparison of Cold and Hot PoDFA Procedure for Particle Monitoring in Liquid Aluminium
Aluminum Billets D.C. Casting: Level-pour vs. Fall-pour: A Techno-historical Approach
Aluminum Casting Furnace Energy Efficiency : Recent Improvements in RTA Casthouses
Assessment of Active Filters for High Quality Aluminium Cast Products
Assessment of Settling Behavior of Particles with Different Shape Factors by LiMCA Data Analysis
Calculated Aluminum Oxidation Rates during Rotary Furnace Melting through Flue Gas Analysis - Part Two
Case Study on Round-Top Fire Rates
Design of Square Induction Coils for the Electromagnetic Priming of Ceramic Foam Filters
Effect of High Intensity Ultrasonic Treatment on the Microstructure, Corrosion and Mechanical Behaviour of AC7A Aluminium Alloy
Effect of Liquid Metal Distribution on the Flow Field and Macrosegregation during Direct Chill Casting of Aluminum Alloy 7050
Effect of Soaking Treatment on the Microstructure and Wear Behavior of the Ultrasonic Melt-treated B390 Hypereutectic Al-Si Alloy
Furnace Modelling for Efficient Combustion Gas Circulation
Furnace Pressure Control Technology for Fuel Efficiency
Grain Refinement of Self-hardening Aluminum Alloys
History and Development of Slag and Dross Pressing
Hot Tearing in DC Casting Ingot of 7XXX Aluminum Alloys
Increasing Holding Furnace Capacity from 30 to be 40 Tons Molten Aluminium through Modification of Lining Design
Influence of Oxidation on Contact Angle between Liquid Aluminum and Al2O3
Initial Development of Micro-Shrinkage Crack During Early Stages of Direct Chill Casting of Al-4.5%Cu Alloy
Inline Melt Treatment for Low to Medium Metal Flow Rates
Mechanism of Zirconium Poisoning Effect on TiB2 Inoculation in Aluminium Alloys
Modeling of Inclusion Behaviour in an Aluminium Induction Furnace
Modification of Eutectic Si and Refinement of Eutectic Grain in Al-Si-Mg Based Alloys by CrB2 and Sr Addition
Modification of Macrosegregation Patterns in Rolling Slab Ingots by Bulk Grain Migration
Numerical Simulation of Degassing Phenomena in Continuous Casting Process under External Static Magnetic Field on Flow Pattern in Slab Mold
On the Cast House Exergy Management
Optimization of the Ultrasonic Processing in a Melt Flow
Study of Manganese Dissolution in Aluminum Melts
Successful Implementation of a New Rolling Slab Casting Technology, AFM, within Hydro
Testing PPE for Molten Aluminum Splash Resistance
The Problem of Cavities in Open Mold Conveyor Remelt Ingots
The Study Conditions Occurrence of Hot Tearing in the Billets Alloy EN AW6060 Produced with the Process of Direct Chill Casting
Theory and Practical Application of Ultrasonic Degassing.
Thermo-Mechanical Properties of Wrought Aluminium Alloys produced from Scrap Mixing
TiB2 Particle Detection in Liquid Aluminum Via Laser-Induced Breakdown Spectroscopy
Ultrasonic Grain Refining of Continuous Cast Aluminum: Microstructure and Properties
Uncertainty Propagation in Numerical Modeling of Direct Chill Casting
Weibull Analysis for the Repeatability of Die-castings Made by an Al-Mg-Si-Mn Alloy

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