Forgeability and Flow Stress of Mg-Zn-Y Alloys with Long Period Stacking Ordered Structure at Elevated Temperatures

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Abstract

To develop a forging process for high strength Mg-Zn-Y alloys with a long period stacking ordered (LPSO) structure, the forgeability and flow stress of Mg<SUB>97</SUB>Zn<SUB>1</SUB>Y<SUB>2</SUB> (at%) alloys were investigated with the upsettability test at an initial strain rate of 0.55 s<SUP>−1</SUP>. As-cast and extruded Mg<SUB>97</SUB>Zn<SUB>1</SUB>Y<SUB>2</SUB> alloys can be successfully forged without fracture up to 0.5 and 1.0 respectively of average equivalent strain at a forging temperature of 773 K. To remove the influence of the temperature change during upsetting from the experimentally obtained flow stress curve, the isothermal flow stress curve was estimated by combining experimental results with finite element analysis. Furthermore, the mechanical properties of the forged Mg-Zn-Y alloys were measured, and the influence of microstructure on the forging properties was discussed.

Journal

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 50(4), 841-846, 2009-04-01

    The Japan Institute of Metals and Materials

References:  20

Cited by:  1

Codes

  • NII Article ID (NAID)
    10024813722
  • NII NACSIS-CAT ID (NCID)
    AA1151294X
  • Text Lang
    ENG
  • Article Type
    Journal Article
  • ISSN
    13459678
  • NDL Article ID
    10201726
  • NDL Source Classification
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL Call No.
    Z53-J286
  • Data Source
    CJP  CJPref  NDL  J-STAGE 
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