Journal
INTERNATIONAL JOURNAL OF METALCASTING
Volume 10, Issue 4, Pages 457-465Publisher
SPRINGER INTERNATIONAL PUBLISHING AG
DOI: 10.1007/s40962-016-0032-8
Keywords
aluminum cast alloys; eutectic modification; thermal analysis; tensile properties
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Funding
- KK-foundation in Sweden
- Kongsberg Automotive AB as a part of the CompCAST program
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This study presents a correlation between the depression in eutectic growth temperature as a result of Sr modification and the tensile properties of Al-Si cast alloys. In order to study the role that Sr exerts on the solidification behavior, modification and mechanical properties, controlled solidification experiments including thermal analysis were performed. Using three mold materials for different cooling rates, tensile testing was conducted on Al-Si alloys with various Sr levels (similar to 35-500 ppm). The gradient solidification technique was used to produce directionally solidified tensile test specimens containing low levels of defects. The depression in eutectic Si growth temperature was correlated with the Sr additions and the tensile properties (elongation to failure and tensile strength).
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