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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Cast Shop Technology
Presentation Title Ultrasonic Assisted Reduction of Hot-tearing during High-speed DC Casting of 6000 Series Aluminum Alloys
Author(s) Sergey Komarov, Yasuo Ishiwata, Yoshihiro Takeda
On-Site Speaker (Planned) Sergey Komarov
Abstract Scope This work presents results of preliminary investigations concerning the effect of ultrasonic vibrations on the solidification structure and hot-tearing susceptibility of 6000 series aluminum alloys in high-speed direct chill casting process. A pilot DC caster was used to produce billets of 82~97 mm in diameter. Ultrasonic vibrations were introduced directly into the caster mold through a high-amplitude ceramic sonotrode, the tip of which was positioned at different distances from the melt crystallization front. Then, the cast billets were investigated for the microstructure and hot tearing susceptibility. The results revealed that the ultrasonic treatment leads to a significant reduction of hot tearing susceptibility although the ultrasonic effect is dependent on the vibration amplitude and sonotrode tip position. It is suggested that ultrasonically improved fluidity of the melt in the mushy zone and uniformity of solidification structure are the major contributor to the reduction in hot tearing susceptibility.
Proceedings Inclusion? Planned: Light Metals

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Study on DC Casting Trough/ Launder Design and Material Selection
Application and Results of Oxipyr Diluted Combustion in Aluminum Furnaces
Automation and Optimization of Sow Casting in Alouette
Case Study of Magnetically-Stirred Casting Furnaces at New Zealand Aluminium Smelters Limited
Circulation of Grains during Ingot Casting
Critical Role of Thermal Management during Cast Start-up of DC Casting Process
Effect of Grain Refiners on Aluminum Twin Roll Casting Process
Effect of Magnesium Content on Microstructure and Mechanical Properties of Twin-Roll Cast Aluminum Alloys
Effect of Ultrasonic Processing on a Direct Chill Cast AA6082 Aluminium Alloy
Energy Efficiency Status-quo of UK Foundries: The “Small-Is-Beautiful” Project
Full Size Measurement and Simple Prediction on Macro Segregation of Aluminum Alloys Elements in Industrial DC Casting Slab
Grain Refiner Settlement in the Launder System of Twin Roll Casting and Application of Electromagnetic Stirring
Have Recent Advances in Direct Chill Casting Made Us Less Safe?
Influence of Process Conditions on Segregation Behavior in Twin-Roll Casting of an AlFeSi Alloy
Influence of Sticking on the Roll Topography at Twin-roll Casting of Aluminum Alloys
Material Surface Roughness Change in Twin Roll Casting of Aluminium as Cast Sheet Product
Minimization of Macrosegregation through Jet Erosion of a Continuously Cast Ingot
Modelling and Analysis of a Horizontal Direct Chill Casting Process
Multi-Component High Pressure Die Casting (M-HPDC): Influencing Factors on the Material Temperature during the Joining of Metal-plastic-hybrids
Operational and Economic Impact of Super Vacuum Die Casting Technologies
Optimization of Recovery Efficiency for Briquetted Aluminum Chips up to Briquetting Parameters
Overpressure Due to a Molten Aluminum and Water Explosion in a Casthouse
Peritectic Coupled Growth Solidification - A Review
Radio Frequency Identification (RFID) Technology for the Aluminum Industry
Semi Finished Products Traceability Improvement with Laser Marking
Sequential Gravity Casting in Functionally Graded Aluminum Alloys Development
Shear Induced Grain Refinement of a Continuously Cast Ingot
Structural Integrity Assessment of Pressurized Ladles for Aluminum Smelting
The Evaluation of Hot Dross Processing Systems
Twin-roll Casting of Aluminum-steel Clad Strips: Static and Dynamic Mechanical Properties of the Composite
Ultrasonic Assisted Reduction of Hot-tearing during High-speed DC Casting of 6000 Series Aluminum Alloys
X-Ray Computed Tomographic Investigation of High Pressure Die Castings

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