, Volume 64, Issue 2, pp 337–345 | Cite as

Effect of Fe-Rich Particles on the Formation of Die Streaks on Anodized Aluminum Extrusions

  • Hanliang Zhu
  • Tao Wei
  • Malcolm J. Couper
  • Arne K. Dahle


Fe-rich intermetallic particles are one of the important constituents in the microstructure of 6xxx series aluminum extrusions. The size, amount, and distribution of these particles can be different in different locations of the extrudate due to inhomogeneous deformation during the extrusion process. Furthermore, these intermetallic particles change the dissolution kinetics of grain interiors and grain boundaries during etching, influencing the formation and severity of grain boundary grooves. An inhomogeneous distribution of Fe-rich particles results in a nonuniform distribution of grain boundary grooves and occurrence of die streaks.


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Copyright information

© TMS 2012

Authors and Affiliations

  • Hanliang Zhu
    • 1
  • Tao Wei
    • 1
  • Malcolm J. Couper
    • 2
  • Arne K. Dahle
    • 3
  1. 1.Institute of Materials EngineeringAustralian Nuclear Science & Technology OrganisationSydneyAustralia
  2. 2.ARC CoE for Design in Light MetalsMonash UniversityClaytonAustralia
  3. 3.ARC CoE for Design in Light Metals, Materials EngineeringUniversity of QueenslandBrisbaneAustralia

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