Characterization of microstructures and growth orientation deviating of Al2Cu phase dendrite at different directional solidification rates

Ka Gao, Shaojie Song, Shuangming Li, Hengzhi Fu

Research output: Contribution to journalReview articlepeer-review

28 Scopus citations

Abstract

At different directional solidification rates (10, 20 and 100 μm/s), microstructures and growth orientation variations of Al2Cu dendrite in Al-40%Cu alloy were characterized. When solidification rates were ranged from 10 to 100 μm/s, three-dimensional microstructure of Al2Cu dendrite changed from faceted L-shaped patterns to non-faceted complex dendrite morphology in transverse section. By the macro and micro orientation analysis characterize methods, [001] growth direction of Al2Cu dendrites with different morphologies was determined. The deviation angle between [001] direction and the heat flow direction was increased with solidified rate increasing. The experimental results showed that the regular solidified microstructure and growth orientation along the heat flow direction could be well controlled under lower directional solidification rate.

Original languageEnglish
Pages (from-to)73-79
Number of pages7
JournalJournal of Alloys and Compounds
Volume660
DOIs
StatePublished - 5 Mar 2016
Externally publishedYes

Keywords

  • Directional solidification
  • Growth orientation
  • Microstructure
  • The deviation angle

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