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3D characterisation of the Fe-rich intermetallic phases in recycled Al alloys by synchrotron X-ray microtomography and skeletonisation

DOI: 10.1016/j.scriptamat.2017.12.010 DOI Help

Authors: Y. Zhao (National Engineering Research Centre of Near-Net-Shape Forming for Metallic Materials, South China University of Technology; University of Hull) , W. Du (University of Hull) , B. Koe (University of Hull; Diamond Light Source) , T. Connolley (Diamond Light Source) , S. Irvine (Diamond Light Source) , P. K. Allan (Diamond Light Source) , C. M. Schlepütz (Swiss Light Source) , W. Zhang (National Engineering Research Centre of Near-Net-Shape Forming for Metallic Materials, South China University of Technology) , F. Wang (BCAST, Brunel University London) , D. G. Eskin (BCAST, Brunel University London) , J. Mi (University of Hull)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Scripta Materialia , VOL 146 , PAGES 321 - 326

State: Published (Approved)
Published: March 2018

Abstract: Synchrotron X-ray microtomography and skeletonisation method were used to study the true 3D network structures and morphologies of the Fe-rich intermetallic phases in recycled Al-5.0%Cu-0.6%Mn alloys with 0.5% and 1.0% Fe. It was found that, the Fe-phases in the 1.0%Fe alloy have node lengths of 5–25 μm; while those in the 0.5%Fe alloy are of 3–17 μm. The Fe-phases in the 1.0%Fe alloy also developed sharper mean curvature with wider distribution than those in the 0.5%Fe alloy. Combining SEM studies of the deeply-etched samples, the true 3D structures of 4 different type Fe phases in both alloys are also revealed and demonstrated.

Journal Keywords: Synchrotron X-ray tomography; Skeletonisation analysis; Fe-rich intermetallic phases; Aluminium alloys; Solidification

Subject Areas: Materials, Engineering

Facility: Swiss Light Source