Microstructure Evolutions of Rapidly-Solidified and Conventionally-Cast Mg<SUB>97</SUB>Zn<SUB>1</SUB>Y<SUB>2</SUB> Alloys

• Ono Akira

  Department of Materials Engineering, The University of Tokyo

• Abe Eiji

  Department of Materials Engineering, The University of Tokyo

• Itoi Takaomi

  Department of Electronics and Mechanical Engineering, Chiba University

• Hirohashi Mitsuji

  Department of Electronics and Mechanical Engineering, Chiba University

• Yamasaki Michiaki

  Department of Materials Science, Kumamoto University

• Kawamura Yoshihito

  Department of Materials Science, Kumamoto University

Bibliographic Information

Other Title

• Microstructure evolutions of rapidly-solidified and conventionally-cast Mg97Zn1Y2 alloys

Abstract

Microstructure evolutions of rapidly-solidified (RS) ribbon and conventionally cast bulk Mg-1 at%Zn-2 at%Y alloys have been studied by transmission electron microscopy (TEM), particularly focusing on formation process and phase stability of the long-period structures. It is found that there are significant differences in microstructural evolutions between the RS ribbon and the cast-bulk alloys, in terms of thermal stability of the long-period phases at temperatures higher than 673 K. For both the as-quench ribbon and the as-cast bulk specimens, 18R-type long-period phase is dominantly observed at grain boundaries. After annealing at temperatures higher than 673 K, the long-period phases at grain boundaries in the RS ribbon almost disappear to form Mg₂₄Y₅ and Mg₃Zn₃Y₂ compounds within the grain interiors, while the long-period phases remained stable in the cast-bulk alloy even at temperatures higher than 673 K.

Journal

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 49 (5), 990-994, 2008

  The Japan Institute of Metals and Materials

Keywords

• magnesium-zinc-yttrium alloy
• long-period structure
• microstructure
• transmission electron microscopy

Details

• CRID: 1390001204249257856
• NII Article ID: 10021146560
• NII Article ID: 130004454016
• NII Book ID: AA1151294X
• DOI: 10.2320/matertrans.mc200763
• ISSN: 13475320
• ISSN: 13459678
• NDL BIB ID: 9480374
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9480374
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/49/5/49_MC200763/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed