Microstructural Evolution and Crystal Orientation of Electromagnetically Stirred Al Alloy in the Semi-Solid State

Dock Young Lee; Suk Won Kang; Ha Young Kim; Ki Bae Kim

doi:10.4028/www.scientific.net/MSF.544-545.399

Paper Titles

In-Situ Joining of Combustion Synthesized Ni3Al Intermetallic Compounds with AZ91D Mg Alloy
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In–Situ Synthesis of Co_p/Cu Coating by Laser Cladding
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Investigation of Thermal Shock Behaviors for Machinable SiC/h-BN Ceramic Composites
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Mechanical Properties and Formability of AZ31 Magnesium Alloy Processed by Differential Speed Rolling
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Microstructural Evolution and Crystal Orientation of Electromagnetically Stirred Al Alloy in the Semi-Solid State
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Microstructure Analysis and Characterization of Li(Ni_1-xCo_x)O₂ Thin Film Prepared by Li Diffusion on Ni-Co Alloy Substrates for Cathode Application
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Microstructure and Formability of Different-Speeds Rolled AZ31 Mg Sheet
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Microstructure and High Temperature Mechanical Properties of Inconel 617
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Microstructure and Mechanical Properties of Si₃N₄/hBN Composites Prepared by Hot-Pressing Using Nitrided Si₃N₄ Powders
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HomeMaterials Science ForumMaterials Science Forum Vols. 544-545Microstructural Evolution and Crystal Orientation...

Microstructural Evolution and Crystal Orientation of Electromagnetically Stirred Al Alloy in the Semi-Solid State

Abstract:

Through more than three decades of development, a semi-solid metal processing has been successfully established as a unique casting technique to produce a structural component for an automobile industry with high integrity and improved mechanical properties. A slurry-on-demand process to make the semi-solid slurry having a fine and globular microstructure has been very important in the semi-solid metal process. In the present study, the orientation distribution functions (ODFs) calculated from the pole figure data were examined and tried to characterize the bulky morphology of primary solid phase of the semi-solid slurry of Al-Cu alloy produced with various magnetic flux density of 100 to 300Gauss in the specially designed electromagnetic (EM) stirrer. Columnar dendritic structure of primary α phase was turned into a rosette and globular structure by EM stirring during solidification. The primary α phase was refined and globularized with increasing a magnetic flux density of EM stirring. Also, due to the EM stirring the tendency to random orientation was appeared. In the case of unstirred Al-Cu alloy the <110>//ND texture was developed strongly and <100>//ND and <111>//ND texture was weakly developed. But with the increase of the EM stirring strength, <100>//ND and <111>//ND texture were more strongly advanced. Due to EM stirring the texture was almost completely randomized.