EBSD investigation of the effect of the solidification rate on the nucleation behavior of eutectic components in a hypoeutectic Al-Si-Cu alloy
2012 (English)In: Metals and Materials International, ISSN 1598-9623, Vol. 18, no 3, 405-411 p.Article in journal (Refereed) Published
This article is devoted to a study of the influence of solidification rate on the crystallographic orientation of eutectic components with respect to primary α-Al in the tested hypoeutectic alloy. Electron backscattering diffraction (EBSD) patterns were produced from Al-Si cast specimens, solidified with different cooling rates, and prepared by ion etch polishing as a complementary method after mechanical polishing. Results indicated a strong orientation relationship between the primary α-Al and eutectic aluminum phase at all cooling rates. It is also found that the silicon eutectic flakes are nucleated heterogeneously in the interdendritic eutectic liquid. Increasing the cooling rate from 2 to 80 mm/min is observed to be effective in lowering the intensity of relationship between the primary α-Al and eutectic aluminum phase and changing the misorientation angle clustering between primary α-Al and eutectic silicon phase in the interval 41-60 to lower angle intervals.
Place, publisher, year, edition, pages
2012. Vol. 18, no 3, 405-411 p.
EBSD, Pole figure analysis, Al-Si alloy, Nucleation, Orientation relationship
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-70096DOI: 10.1007/s12540-012-3004-4ISI: 000305689900004OAI: oai:DiVA.org:liu-70096DiVA: diva2:435493