Formation and Mechanical Properties of Mg97Zn1RE2 Alloys with Long-Period Stacking Ordered Structure

  • Kawamura Y
  • Yamasaki M
  • 50

    Readers

    Mendeley users who have this article in their library.
  • 273

    Citations

    Citations of this article.

Abstract

We investigated the formation and mechanical properties of Mg 97Zn1RE2 alloys with long-period stacking ordered (LPSO) structures by examining RE = Y, La, Ce, Pr, Sm, Nd, Gd, Dy, Ho, Er, Tb, Tm and Yb. The LPSO phase developed for RE = Y, Dy, Ho, Er, Gd, Tb and Tm. LPSO Mg-Zn-RE alloys are either type I, in which the LPSO phase forms during solidification: Mg-Zn-Y, Mg-Zn-Dy, Mg-Zn-Ho, Mg-Zn-Er and Mg-Zn-Tm, or type II, in which the LPSO phase is nonexistent in as-cast ingots but precipitates with soaking at 773 K: Mg-Zn-Gd and Mg-Zn-Tb. The criteria for REs that form an LPSO phase in Mg-Zn-RE alloys are discussed. Mg-Zn-RE alloys with an LPSO phase, which were worked by hot extrusion, include high strength both at ambient and elevated temperatures, and good ductility. Their tensile yield strength, ultimate strength and elongation were 342-377MPa, 372-410MPa and 3-9%, respectively at ambient temperature, and 292-310MPa, 322-345MPa and 4-13% at 473 K. The LPSO Mg-Zn-RE alloys are promising candidates for lightweight structural materials. © 2007 The Japan Institute of Metals.

Author-supplied keywords

  • long-period stacking ordered structure
  • magnesium-zinc-rare earth
  • mechanical properties
  • structural material

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Authors

  • Yoshihito Kawamura

  • Michiaki Yamasaki

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free