Static softening following multistage hot deformation of 7150 aluminum alloy: Experiment and modeling

Fulin Jiang, Hatem S. Zurob, Gary R. Purdy, Hui Zhang

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13 Citations (Scopus)

Abstract

Previous studies have demonstrated that the static softening kinetics of 7150 aluminum alloy showed typical sigmoidal behavior at 400. °C and softening plateaus at 300. °C (F.L. Jiang, et al., Mater. Sci. Eng. A, vol. 552, 2012, pp. 269-275). In present work, the static softening mechanisms, the microstructural evolution during post-deformation holding was studied by optical microscopy, scanning electron microscope, electron back-scattered diffraction and transmission electron microscopy. It was demonstrated that recrystallization is essentially absent during post-deformation holding, and that static recovery was the main contribution to static softening. Strain induced precipitation and coarsening caused softening plateaus at 300. °C. In order to better understand the static softening mechanism, physically-based modeling, which integrated recovery and multicomponent particle coarsening modeling, was employed to rationalize the experimental results.

Original languageEnglish
Pages (from-to)164-177
Number of pages14
JournalMaterials Science and Engineering A
Volume648
DOIs
Publication statusPublished - Nov 11 2015

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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