Effects of Pre-Strain and Ageing on the LPSO Structure in Mg₉₇Zn₁Y₂ Alloy (Special Issue on Long-Period Stacking Ordered Structure and Its Related Materials(2)) Effects of Pre-Strain and Ageing on the LPSO Structure in Mg<sub>97</sub>Zn<sub>1</sub>Y<sub>2</sub> Alloy

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Abstract

The effects of pre-strain and ageing on the LPSO structure in Mg<sub>97</sub>Zn<sub>1</sub>Y<sub>2</sub> 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

Codes

  • NII Article ID (NAID)
    130005083568
  • NII NACSIS-CAT ID (NCID)
    AA1151294X
  • Text Lang
    ENG
  • ISSN
    1345-9678
  • NDL Article ID
    026564357
  • NDL Call No.
    Z53-J286
  • Data Source
    NDL  J-STAGE 
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