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Meeting MS&T22: Materials Science & Technology
Symposium Development in Light Weight Alloys and Composites
Presentation Title Ultrasonically-Induced Microstructural Refinement to Improve Strength of an Al-Si-Mg Casting
Author(s) Katherine Rader, Jens Darsell, Jon Helgeland, Timothy Roosendaal, Ethan Nickerson, Aashish Rohatgi
On-Site Speaker (Planned) Katherine Rader
Abstract Scope Ultrasonic melt processing of aluminum alloys is of interest to improve the mechanical properties of cast automotive components through local microstructural refinement. In this study, ultrasonic vibrations were applied during solidification of a commercial Al-Si-Mg alloy with added Fe content and cast in a graphite mold. Casting with the application of ultrasound changed the morphology of the microstructure from dendritic to non-dendritic, reduced the equivalent grain size of the primary aluminum grains by approximately 80 %, and changed the morphology of β-Al5FeSi phase particles from needle-shaped to rectangular. Iron contamination can be detrimental to mechanical performance. However, the ultrasonically-modified non-dendritic microstructure is expected to be stronger and more ductile than the dendritic microstructures of typical castings. Therefore, casting an Al-Si-Mg alloy with high Fe content with the application of ultrasound can potentially produce microstructures with mechanical properties comparable to an alloy with low Fe content.

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Data-driven Search and Analysis for Selection of Ti-containing High Entropy Alloys for Aeroengine Applications
Correlations between Ultrasonic Processing, Reinforcement Morphology, and Multi-scale Mechanical Performance of Metal Matrix Composites
Delayed Aging in Aluminum Alloys
Designing Al-Cu Alloy to Improve the Mechanical Properties and Thermal Stability via Micro-alloying with Cr Solute
Development and Research of a Scandium-containing Filler for Welding Aircraft Products from an Alloy of the Mg-Zr-Nd System
Development of Functionally Graded Al Metal Matrix Hybrid Composite Reinforced with CNT ,Y2O3 & SiC through PM Route
Development of Hierarchical Aluminum-based Metal Matrix Composites Using Friction Extrusion
Effect of Tin Addition on Mechanical and Corrosion Behavior of Mg-Zn-Si Alloy
Enhancing the Strength of Al-B4C Composites
Friction Stir Processing Based Local Microstructure Modification to Improve High-cycle Fatigue Properties of High-pressure Die-cast Aluminum Alloy
Improving the Strength of AlCoCrNi Dual-phase High-entropy Alloy through ChemicalTtransformation
Influence of Alkaline Earth Metals on Structure Formation and Magnesium Alloys Properties
Investigating Solid Solution Formation in High Entropy Carbide-based Ceramics
Investigation of the Residual Stress on AlSi10MnMg Alloy with Various Grain Size
Laser Powder Bed Fusion of Highly-reinforced Aluminum Composite Powders Produced by Mechanical Alloying
Novel Materials Discovery on Li-Based Compounds Using Machine Learning
Recent Developments in Flux-Free Brazing of Aluminum Alloys
Selective Reinforcement of Structures Using Fiber Reinforced Aluminum
Self-assembly and In-situ X-ray Diffraction Characterization of Two-dimensional Ti3C2Tx MXene in Al Matrices for Additive Manufacturing
Single and Double Core-Shell Nanocomposite Bulk Ceramics in the Y2O3-ZrO2-Al2O3 System
Solute Synergy Improved Thermal Stability of Nanotwinned Al Alloys
The Effect of Si on Tungsten Aluminide Formation and Growth
The Role of Mo and Ti in Strengthening Mechanical Properties of the AlCrFeNi Eutectic High Entropy Alloys
Ultrasonically-Induced Microstructural Refinement to Improve Strength of an Al-Si-Mg Casting
Understanding the Influence of Yield Asymmetry on Sheet Metal Bendability of Magnesium Alloys

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