Effects of samarium (Sm) additions on the microstructure and mechanical properties of as-cast and hot-extruded Mg-5 wt%Al-3 wt%Ca-based alloys

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

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

Samarium (Sm) additions to as-cast Mg-5Al-3Ca-based alloys result in changes, such as equiaxed grains and a refined grain size. The microstructure of as-cast Mg-5Al-3Ca-xSm alloys consists of an α-Mg matrix, a (Mg, Al)2Ca eutectic phase, and an Al2Sm intermetallic compound. In as-cast alloys, the (Mg, Al)2Ca eutectic phase was located at grain boundaries with a chain structure, and the Al2Sm intermetallic compounds were homogeneously distributed at the α-Mg matrix and grain boundaries. The eutectic phase of the extruded alloys was elongated in the extrusion direction and crushed into fine particles because of severe deformation during hot extrusion, and the grain size was refined with an increased amount of Sm addition. The maximum values of the yield strength and tensile strength were 313 MPa and 330 MPa at 2 wt%Sm alloy content, respectively.

Original languageEnglish
Pages (from-to)446-452
Number of pages7
JournalJournal of Alloys and Compounds
Volume473
Issue number1-2
DOIs
Publication statusPublished - 2009 Apr 3

Keywords

  • Casting
  • Extrusion
  • Mg-Al-Ca alloys
  • Rare earth element
  • Samarium (Sm)

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Effects of samarium (Sm) additions on the microstructure and mechanical properties of as-cast and hot-extruded Mg-5 wt%Al-3 wt%Ca-based alloys'. Together they form a unique fingerprint.

  • Cite this