Growth of β intermetallic in an Al-Cu-Si alloy during directional solidification via machine learned 4D quantification. (May 2019)

• Record Type: Journal Article
• Authors: Cai, B.; Kao, A.; Lee, P.D.; Boller, E.; Basevi, H.; Phillion, A.B.; Leonardis, A.; Pericleous, K.
• Is Part Of: Scripta materialia. Number 165(2019)
• Page Start: 29
• Page End: 33
• Publication Date: 2019-05
• Subjects: Al alloys -- Intermetallics -- Synchrotron X-ray tomography -- 4D imaging; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2019.02.007
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Fe contamination is a serious composition barrier for Al recycling. In Fe-containing Al-Si-Cu alloy, a brittle and plate-shaped β phase forms, degrading the mechanical properties. Here, 4D (3D plus time) synchrotron X-ray tomography was used to observe the directional solidification of Fe-containing Al-Si-Cu alloy. The quantification of the coupled growth of the primary and β phase via machine learning and particle tracking, demonstrates that the final size of the β intermetallics were strongly influenced by the solute segregation and space available for growth whereas the β orientation was controlled by the temperature gradient direction. The work can be used to validate predictive models. Graphical abstract: Unlabelled Image