Dynamic Mechanical Properties of Continuously Cast Al Alloy in Electromagnetic Stirrer
Autor: | Ki Bae Kim, Suk Won Kang, Dock Young Lee |
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Rok vydání: | 2006 |
Předmět: |
Materials science
Metallurgy Alloy engineering.material Condensed Matter Physics Microstructure Atomic and Molecular Physics and Optics Continuous casting Fracture toughness visual_art Ultimate tensile strength Aluminium alloy visual_art.visual_art_medium engineering General Materials Science Elongation Eutectic system |
Zdroj: | Solid State Phenomena. :340-343 |
ISSN: | 1662-9779 |
DOI: | 10.4028/www.scientific.net/ssp.116-117.340 |
Popis: | The mechanical properties of electromagnetically stirred billet of Al alloy during continuous casting such as a tensile, impact, and fatigue property was examined with respect to a size and roundness of primary α phase to examine the influence of the globularization and refining of primary α phase on the dynamic mechanical property. The billet was continuously cast in a casting speed of 100 to 600 mm/min during the electromagnetic stirring with a magnetic flux density of 700 Gauss and then was heat-treated. All tensile properties were enhanced with decreasing the size of primary α crystal and the ultimate tensile strength (UTS), yield strength, and elongation was obtained 320MPa, 235MPa, and 17.8%, respectively, at a size of primary α phase of 77 um. The fatigue life at fracture was largely improved by 37% from 1.25×105 to 1.7×105 cycles and the fracture toughness was obtained approximately 7.25 joules as a maximum value at a minimum size of primary α phase on the present experiment condition. Therefore, it indicates that all mechanical properties can be improved at the higher casting speed owing to the fine microstructure of a primary α phase and also eutectic phase due to the higher cooling rate. |
Databáze: | OpenAIRE |
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