Deformation Behavior of Long-Period Stacking Ordered Structured Single Crystals in Mg₈₅Zn₆Y₉ Alloy

• Mine Yoji

  Department of Materials Science and Engineering, Kumamoto University

• Maezono Ryo

  Department of Materials Science and Engineering, Kumamoto University

• Oda Hiroaki

  Department of Materials Science and Engineering, Kumamoto University

• Yamasaki Michiaki

  Magnesium Research Centre, Kumamoto University

• Kawamura Yoshihito

  Magnesium Research Centre, Kumamoto University

• Takashima Kazuki

  Department of Materials Science and Engineering, Kumamoto University

Bibliographic Information

Other Title

• Deformation Behavior of Long-Period Stacking Ordered Structured Single Crystals in Mg₈₅Zn₆Y₉ Alloy
• Deformation behavior of long-period stacking ordered structured single crystals in Mg85Zn6Y9

Abstract

Microtension tests were performed on single crystals with different crystallographic orientations, which were prepared using an 18R-type long-period stacking ordered (LPSO) structure in a directionally solidified Mg₈₅Zn₆Y₉ alloy. Anisotropic plasticity was observed for the LPSO phase specimens. Cleavage cracking occurred on the prismatic planes in a crystal with its loading direction parallel to the basal plane. The cleavage stress for the prismatic plane was determined to be approximately 460 MPa. A crystal that was oriented favorably for gliding on the basal plane exhibited a critical resolved shear stress of approximately 9.4 MPa. When a crystal was loaded along [0001], a sudden load drop was observed at a stress of approximately 250 MPa in the initial linear region of the stress–strain relation. Transmission electron microscopy results after the load drop showed that the deformation microstructure contained a twin-like boundary with a rotation axis along [11\bar{2}0].

Journal

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 56 (7), 952-956, 2015

  The Japan Institute of Metals and Materials

Keywords

• microtension testing
• magnesium alloys
• plastic deformation
• slip
• twinning

Details

• CRID: 1390282679230268288
• NII Article ID: 130005083569
• NII Book ID: AA1151294X
• DOI: 10.2320/matertrans.mh201415
• ISSN: 13475320
• ISSN: 13459678
• NDL BIB ID: 026564431
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I026564431
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/56/7/56_MH201415/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed