Microstructures of Long-Period Stacking Ordered Phase of Mg–Zn–Y Alloy

• Gao Hongye

  Department of Materials Science and Engineering, Faculty of Engineering, Kyushu University

• Ikeda Ken-ichi

  Department of Engineering Sciences for Electronics and Materials, Faculty of Engineering Sciences, Kyushu University

• Morikawa Tatsuya

  Department of Materials Science and Engineering, Faculty of Engineering, Kyushu University

• Higashida Kenji

  Department of Materials Science and Engineering, Faculty of Engineering, Kyushu University

• Nakashima Hideharu

  Department of Engineering Sciences for Electronics and Materials, Faculty of Engineering Sciences, Kyushu University

Bibliographic Information

Other Title

• Microstructures of Long-Period Stacking Ordered Phase of Mg–Zn–Y Alloy

Abstract

The microstructures of α-Mg, long-period stacking ordered (LPSO) phases, and kink bands in a Mg–Y–Zn alloy were observed by transmission electron microscopy (TEM). The results showed that extruded Mg₉₇Zn₁Y₂ alloy included different kinds of phases: 2H-Mg, 2H-Mg with many stacking faults, 14H and 18R. Kink bands tended to occur in areas where there were many intermetallic compounds. The element distribution of Zn/Y/Mg in the LPSO phase including kink boundaries was also analyzed by scanning TEM energy dispersive X-ray spectroscopy. The results showed that the concentrations of atomic Zn/Y decreased, while the concentration of atomic Mg increased at kink boundaries. This can be understood in terms of the dislocation structure of kink boundaries where extended a-dislocations lying on sequential stacking faults in the LPSO phase cause the annihilation of Zn/Y-rich stacking faults between two partial dislocations.

Journal

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 54 (5), 632-635, 2013

  The Japan Institute of Metals and Materials

Keywords

• microstructures
• long-period stacking ordered phases
• magnesium–zinc–yttrium alloy
• kink bands
• intermetallic compounds

Details

• CRID: 1390282679228095360
• NII Article ID: 10031168402
• NII Book ID: AA1151294X
• DOI: 10.2320/matertrans.mi201219
• COI: 1:CAS:528:DC%2BC3sXhtFChs73E
• ISSN: 13475320
• ISSN: 13459678
• NDL BIB ID: 024446868
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I024446868
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/54/5/54_MI201219/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed