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Metallurgical and Materials Transactions A

, Volume 49, Issue 10, pp 4710–4721 | Cite as

Investigation of Macrosegregation Formation in Aluminium DC Casting for Different Alloy Systems

  • Akash Pakanati
  • Mohammed M’Hamdi
  • Hervé Combeau
  • Miha Založnik
Article
  • 130 Downloads

Abstract

Direct chill (DC) casting of aluminum involves alloys employing different solute elements. In this article, a qualitative analysis and comparison of macrosegregation formation is presented for three different alloy systems: Al-Mg, Al-Zn and Al-Cu. For this purpose, a multiphase, multiscale solidification model based on a volume-averaging method accounting for shrinkage-induced flow, thermal-solutal convection and grain motion is used and applied to an industrial-scale DC-cast ingot. The primary difference between these alloys is the thermal-solutal convection with Al-Mg having a competing thermal and solutal convection, whereas the other two systems have a cooperating thermal and solutal convection. In the study, the combined effect of the macrosegregation mechanisms is analyzed for each alloy to assess the role of the alloy system on the final macrosegregation.

Notes

Acknowledgment

This work is conducted within the framework of the PRIMAL project with support from Hydro, Alcoa, Aleris, the Research Council of Norway and NOTUR High Performance Computing program.

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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2018

Authors and Affiliations

  • Akash Pakanati
    • 1
  • Mohammed M’Hamdi
    • 1
    • 2
  • Hervé Combeau
    • 3
    • 4
  • Miha Založnik
    • 3
    • 4
  1. 1.Department of Materials TechnologyNTNUTrondheimNorway
  2. 2.SINTEF Materials and ChemistryOsloNorway
  3. 3.Institut Jean LamourCNRS – Université de LorraineNancyFrance
  4. 4.Laboratory of Excellence on Design of Alloy Metals for low-mAss Structures (‘DAMAS’)Université de LorraineLorraineFrance

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