Microstructure and mechanical properties of Mg-Al-Ca-Nd alloys fabricated by gravity casting and extrusion process

Hyeon Taek Son, Jae Seol Lee, Ik Hyun Oh, Dae Guen Kim, Kyosuke Yoshimi, Kouichi Maruyama

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The as-cast microstructure of Mg-5Al-3Ca-xNd alloys consists of equiaxed a-Mg matrix, (Mg, Al)2Ca eutectic phase and Al-Nd rich intermetallic compounds. With the increase of Nd addition, a-Mg matrix morphology was changed from dendritic to equiaxed grains due to suppression of grain growth by formation of homogeneous intermetallic compounds containing Nd dispersed at grain boundary and a-Mg matrix. And the grain size of as-cast alloys was decreased as addition of Nd was increased. This eutectic phase of the extruded alloys was elongated to extrusion direction and size of this phase was redined comparing to that of as-cast alloys because of severe deformation during hot extrusion. Maximum yield and ultimate tensile strength value of the as-extruded alloys was 322 and 335 MPa at Mg-5Al-3Ca-2Nd alloy, respectively.

Original languageEnglish
Pages (from-to)1025-1031
Number of pages7
JournalMaterials Transactions
Volume49
Issue number5
DOIs
Publication statusPublished - 2008 May 1

Keywords

  • Casting
  • Extrusion
  • Magnesium-aluminum-calcium alloys
  • Neodymium (Nd)
  • Rare earth element

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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