Deformation Behavior of Long-Period Stacking Ordered Structured Single Crystals in Mg₈₅Zn₆Y₉ Alloy (Special Issue on Long-Period Stacking Ordered Structure and Its Related Materials(2)) Deformation Behavior of Long-Period Stacking Ordered Structured Single Crystals in Mg<sub>85</sub>Zn<sub>6</sub>Y<sub>9</sub> Alloy

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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 Mg<sub>85</sub>Zn<sub>6</sub>Y<sub>9</sub> 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

Codes

  • NII Article ID (NAID)
    130005083569
  • NII NACSIS-CAT ID (NCID)
    AA1151294X
  • Text Lang
    ENG
  • ISSN
    1345-9678
  • NDL Article ID
    026564431
  • NDL Call No.
    Z53-J286
  • Data Source
    NDL  J-STAGE 
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