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 800 rpm and a traverse speed of 50 mm/min. FSP resulted in the fundamental dissolution of the coarse network-like β-Mg 5(Gd,Y) phase and remarkable grain refinement (∼6.1 μm), 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 439 MPa and a yield strength of 330 MPa. FSP combined with aging is a simple and effective approach to enhancing the mechanical properties of Mg-Gd-Y-Zr casting. © 2010 Elsevier B.V. All rights reserved.

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  • B. L. Xiao

  • Q. Yang

  • J. Yang

  • W. G. Wang

  • G. M. Xie

  • Z. Y. Ma

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