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Compound forming of 7075 aluminum alloy based on functional integration of plastic deformation and thixoformation

  • Qiang Chen
  • , Gang Chen*
  • , Xinghua Ji
  • , Fei Han
  • , Zude Zhao
  • , Jia Wan
  • , Xinquan Xiao
  • *Corresponding author for this work
  • Southwest Technology and Engineering Research Institute
  • Harbin Institute of Technology
  • Laiwu Vocational and Technical College

Research output: Contribution to journalArticlepeer-review

Abstract

A compound forming technology of functional integration of plastic deformation and thixoformation was proposed. The feasibility of the proposed forming technology was verified by near net shaping of empennage-shape component with complex geometric shape including a handle and 6 blades with a small thickness of 1.5 mm. The handle and the blades were formed by plastic deformation and thixotropic deformation, respectively. 7075 alloy slurries with gradient microstructure containing thermoplastic, transition, and semisolid regions were obtained by gradient induction heating. The effect of heating rate during gradient induction heating on recrystallization of 7075 alloy was investigated. When the temperature of semisolid region was controlled in a suitable processing window between 590 and 630 °C with a heating rate of 4 °C/s, and empennage-shape component with homogenous distribution of hardness could be formed successfully by the compound forming technology.

Original languageEnglish
Pages (from-to)167-175
Number of pages9
JournalJournal of Materials Processing Technology
Volume246
DOIs
StatePublished - 1 Aug 2017
Externally publishedYes

Keywords

  • Compound forming
  • Gradient induction heating
  • Near net shaping
  • Thixoforming

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