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Microstructure Evolution and Mechanical Properties of Spray-deposited Al-21. 47Si-4. 73Fe-2. 5Cu-0. 9Mg Alloy

  • Shanghai University
  • Harbin Institute of Technology
  • Shanghai University of Engineering Science
  • Inner Mongolia University of Technology

Research output: Contribution to journalArticlepeer-review

Abstract

Al-Si-Fe-Cu-Mg alloy was prepared by spray deposition and was further processed by hot extrusion as well as T6 heat-treatment. The results indicate that the microstructure of the deposited alloy is composed of primary Si particles with average size of less than 5 μm, α-Al, Al2 CuMg, β-Al5 EeSi and δ-Al4FeSi2 (rectangular shape), and no eutectic silicon is found due to the special solidification behavior. The age hardening curves reveal two peaks. The uniform ultimate tensile strength (UTS) and the elongation of the peak-aged Al-Si-Fe-Cu-Mg alloy are 468. 3 MPa, 0.61% at 298 K and 267.4 MPa, 6.42% at 573 K, respectively. The fracture surfaces display brittle fracture morphology at 298 K, whereas it varies to mixture of brittle and ductile failure with increasing the temperature.

Original languageEnglish
Pages (from-to)14-18
Number of pages5
JournalJournal of Iron and Steel Research International
Volume23
Issue number1
DOIs
StatePublished - 1 Jan 2016
Externally publishedYes

Keywords

  • Aging
  • Hypereutectic Al-Si alloy
  • Mechanical property
  • Microstructure
  • Spray deposition

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