Effects of Pre-Strain and Ageing on the LPSO Structure in Mg₉₇Zn₁Y₂ Alloy

• Gu Xinfu

  Institute for Materials Research, Tohoku University

• Furuhara Tadashi

  Institute for Materials Research, Tohoku University

Bibliographic Information

Other Title

• Effects of Pre-Strain and Ageing on the LPSO Structure in Mg₉₇Zn₁Y₂ Alloy
• Effects of pre-strain and aging on the LPSO structure in Mg97Zn1Y2 alloy

Abstract

The effects of pre-strain and ageing on the LPSO structure in Mg₉₇Zn₁Y₂ alloy were investigated by electron microscopy. It is found that 14H type LPSO structure evenly precipitates from the supersaturated matrix during ageing of solutionized sample. This LPSO structure is observed even at the early stage of ageing, and no precursor phase such as 18R is observed before 14H forms. The 14H structure is kept after a long time ageing. Similar results have been found for ageing of pre-strained sample. Moreover, it shows that the pre-strain could reduce the LPSO plate spacing, since the LPSO plate with one or two structure units increased due to deformation. In both un-deformed and deformed cases, LPSO plate grows by ledge mechanism. The cooperative motion of the structure units in the growth ledge may be due to the elastic interactions between the structure units.

Journal

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 56 (7), 917-922, 2015

  The Japan Institute of Metals and Materials

Keywords

• long range periodic stacking ordered structure
• 14H
• magnesium-zinc-yttrium
• pre-strain

Details

• CRID: 1390001204253555456
• NII Article ID: 130005083568
• NII Book ID: AA1151294X
• DOI: 10.2320/matertrans.mh201416
• ISSN: 13475320
• ISSN: 13459678
• NDL BIB ID: 026564357
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I026564357
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/56/7/56_MH201416/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed