Paper Title:
Formation of a Novel X Phase in Mg–Gd–Zn–Zr Alloy
  Abstract

The coherent fine-lamellae consisting of the 2H-Mg and the 14H-type long period stacking ordered (LPSO) structure within α'-Mg matrix have been observed in an as-cast Mg–Gd–Zn–Zr alloy. During subsequent solid solution heat treatment at 773 K, in addition to the lamellae within matrix, a novel lamellar X phase [Mg–(8.37±1.0)Zn–(11.32±1.0)Gd] with the 14H-type LPSO structure was transformed from the dendritical β phase. The 14H-type LPSO structure existing in Mg–Gd–Zn–Zr alloys derives from two variant ways: formation of the 14H-type LPSO structure comes from two variant means: i.e., the formation within matrix and the phase transformation from the β phase to the X phase in grain boundaries.

  Info
Periodical
Materials Science Forum (Volumes 654-656)
Main Theme
Edited by
Jian-Feng Nie and Allan Morton
Pages
623-626
DOI
10.4028/www.scientific.net/MSF.654-656.623
Citation
Y.J. Wu, L. M. Peng, X.Q. Zeng, D.L. Lin, W.J. Ding, "Formation of a Novel X Phase in Mg–Gd–Zn–Zr Alloy", Materials Science Forum, Vols. 654-656, pp. 623-626, 2010
Online since
June 2010
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