Archives of Metallurgy and Materials (Sep 2021)

Effect of Fe-Mn Solid Solution Precursor Addition on Modified AA 7075

  • Min Sang Kim,
  • Dae Young Kim,
  • Young Do Kim,
  • Hyun Joo Choi,
  • Se Hoon Kim

DOI
https://doi.org/10.24425/amm.2021.136380
Journal volume & issue
Vol. vol. 66, no. No 3
pp. 783 – 787

Abstract

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This study suggests a new way to modify the size and morphology of Al-Fe phases in modified AA 7075 by using an Fe-Mn solid solution powder as the precursor. When Fe and Mn are added in the form of a solid solution, the diffusion of Fe and Mn toward the Al is delayed, thus altering the chemical composition and morphology of the precipitates. The fine, spherical precipitates are found to provide a good balance between strength and ductility compared to the case where Fe and Mn are separately added.

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