Mechanical properties of fine-grained flame resistant magnesium alloys processed with severe plastic deformation

DOI
  • Takasu Hyuga
    Ibaraki University Graduate School of Science and Engineering (Engineering) Department of Mechanical Engineering
  • Kimura Kentarou
    Ibaraki University Graduate School of Science and Engineering (Engineering) Department of Mechanical Engineering
  • Yukutake Eitaro
    Industrial Technology Innovation Center Of Ibaraki Prefecture
  • Ito Tomomi
    Gonda Metal Industry Co., Ltd.
  • Noda Masafumi
    Gonda Metal Industry Co., Ltd.
  • Somekawa Hidetoshi
    National Institute for Materials Science
  • Tsuchiya Koichi
    National Institute for Materials Science
  • Kuramoto Shigeru
    Ibaraki University Graduate School of Science and Engineering (Engineering) Department of Mechanical Engineering

Bibliographic Information

Other Title
  • 強ひずみ加工により結晶粒径を微細化した難燃性マグネシウム合金の機械的特性

Abstract

<p>　The strength of magnesium alloys can be effectively increased by refinement of crystal grain size. This study was made to investigate the strength of Mg-Al-Zn-Ca alloys processed with friction stir processing (FSP), which is a method for refining crystal grains. The relationship between mechanical properties and process conditions was investigated. The grain size became finer and more uniform by FSP. The hardness of the FSPed material tends to decrease slightly compared to that before processing. As for tensile properties, FSP processing decreased the value of 0.2% proof stress, and plastic deformation started at lower stress in FSPed specimens. However, the ductility was improved by FSP. In this study, specimens processed with high-pressure torsion (HPT), was also studied. The grain size of the specimens was significantly refined by HPT, and the relation between hardness and grain size followed the Hall-Petch relation, indicating that grain size reduction is effective in increasing the strength of Mg-Al-Zn-Ca alloys used in this study. The effect of change in crystal orientation on the strength required for plastic deformation is also discussed.</p>

Journal

Keywords

Details 詳細情報について

  • CRID
    1390013043977374080
  • DOI
    10.11283/jlwa.60.34.r-5
  • ISSN
    2186618X
    03685306
  • Text Lang
    ja
  • Data Source
    • JaLC
  • Abstract License Flag
    Disallowed

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