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Meeting MS&T23: Materials Science & Technology
Symposium Light Metal Technology
Presentation Title Evolution of Spheroidal α-AlFeSi Phase in 1200 Aluminum by 3D Visualization Using FIB-SEM
Author(s) Mami Mihara Mihara Narita, Hisashi Sato, Yoshimi Watanabe, Tetsuya Motoi, Hideo Yoshida
On-Site Speaker (Planned) Mami Mihara Mihara Narita
Abstract Scope Spheroidal α-AlFeSi phase is one of the intermetallic compounds formed in aluminum alloys. Previous study found that α-AlFeSi crystallizes on the inner walls of hydrogen bubbles generated during the solidification of aluminum. In this study, to investigate its nucleation and growth mechanism, 1200 aluminum with different cooling rates from solidification temperature were fabricated using potatoes as a hydrogen introduction. The formation of voids caused by hydrogen were confirmed, and the size of the voids was larger in the air-cooled sample (AC) than in the water-cooled sample (WQ). In the WQ, the amount of α-AlFeSi formed was small, and its diameter was about 1.5 μm. In AC sample, the diameter of α-AlFeSi increased to about 6 μm. Furthermore, holding at 630 ℃ followed by air-cooling increased the diameter of α-AlFeSi to about 20 μm. Based on the 3D structure image, the growth of α-AlFeSi inside of gas bubbles was confirmed.


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A Machine-learning Assisted Optimization Approach and Microstructure Characterization Method for Laser Powder Bed Fusion
Assesment of the Mechanical Properties of an AlMg7Cu2 Alloy with TiBZrMoV Alloying at Different T6 Solution Heat Treatment Conditons and Modeling of Its Behavior by Continuum Mechanics Approach
Characterisation of A201 Alloy Produced by Low Pressure Die Casting into Resin Sand Moulds
Development of Al-Ce-(Fe)-(Mg) Alloys for Elevated Temperature and High Strength Applications
Effect of Erbium and Europium Addition on Microstructure and Mechanical Properties of A356, A206 and A201 Alloys
Effect of Melt Thermal-rate Treatment on Microstructure and Mechanical Properties in Al-Zn-Mg-Cu Alloy Billets Fabricated by Direct-chill Casting
Effect of Zr-Er-Y L12 Phase on Precipitation Behavior of Al-Zn-Mg Alloy
Effects of Pass Strains of Multi-directional Forging and Additive Cold Rolling of Pure Ti on the Microstructural Evolution and Mechanical Properties
Elastic-plastic Approach on Transformation of LPSO Phases in a Mg-RE Alloy by Nanoindentation
Evolution of Spheroidal α-AlFeSi Phase in 1200 Aluminum by 3D Visualization Using FIB-SEM
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Importance of Runner Design in the Reproducibility of Tensile Tests
Improved Strength in Mg-Al Dissimilar Impact Welding by Surface Nanocrystallization of Mg Alloy Sheet
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Influence of Ce, Ni and Cu on Castability and Mechanical Properties of Al Piston Alloys
Investigating Hydrogen Porosity in Aluminum Laser Welding Using a Three-dimensional Cellular Automaton Model
Investigation on the Grain Refinement of Mg-Al Alloys by Superheating Process Using Rapid Solidification Process
Mechanical Property Comparison of Al11Si Wheels Grain Refined by Ti, Nb and Nucleant 1582
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Observation of Impact Deformation and Fracture on Severe Plastic Deformed Ti by Using Synchrotron Radiation
Optimization of Die Casting Process with Various Oxygen Concentration
Phase Stability in Laser Melted Microstructures of Al-X (X=Zr, Nb, V) Alloys
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Role of Alloying Elements and Solidification Conditions on the Evolution of Fe-rich Intermetallic Phases in Recycled Al-Si Alloys with Higher Fe
Role of Guinier-Preston Zones in Achieving High Strength-ductility in a New Mg-Zn-Al-Ca-Mn-Ce Sheet Alloy
Role of Interfaces on the Orientation Dependent Spheroidization Response of -colonies in Ti-6Al-4V Alloy
Selective Laser Melting of a TiB2/Al-Cu-Mg-Ni-Sc Composite
Solidification Evolution, Microstructure and Tensile Properties of Al-Mg-Sc Alloys
Study on the Improvement of the Mechanical Properties Heavy Commercial Vehicle’s Wheel by the Molten-forged on the A356 Alloy
The Beneficial Effects of Ce Additions on High-Fe Secondary Al-Si Casting Alloys
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