Enhanced mechanical properties of Mg–Gd–Y–Zr casting via friction stir processing

  • Xiao B
  • Yang Q
  • Yang J
 et al. 
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Mg–10Gd–3Y–0.5Zr casting was subjected to friction stir processing (FSP) at a tool rotation rate of 800rpm and a traverse speed of 50mm/min. FSP resulted in the fundamental dissolution of the coarse network-like β-Mg5(Gd,Y) phase and remarkable grain refinement (∼6.1μm), thereby significantly improving the strength and ductility of the casting. Post-FSP aging resulted in the precipitation of fine β′′ and β′ particles in a fine-grained magnesium matrix, producing an ultimate tensile strength of 439MPa and a yield strength of 330MPa. FSP combined with aging is a simple and effective approach to enhancing the mechanical properties of Mg–Gd–Y–Zr casting.

Author-supplied keywords

  • Friction stir processing
  • Magnesium alloys
  • Microstructures
  • Precipitate
  • Solution

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  • B.L. Xiao

  • Q. Yang

  • J. Yang

  • W.G. Wang

  • G.M. Xie

  • Z.Y. Ma

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