Mechanical Properties and Structure of Ignition-Proof Mg–Ca–Zr Alloys Produced by Squeeze Casting

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  • Chang Si-Young
    Department of Metallurgical Engineering, Faculty of Engineering, Tokyo Institute of Technology
  • Tezuka Hiroyasu
    Department of Metallurgical Engineering, Faculty of Engineering, Tokyo Institute of Technology
  • Kamio Akihiko
    Department of Metallurgical Engineering, Faculty of Engineering, Tokyo Institute of Technology

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  • Mechanical Properties and Structure of
  • Mechanical Properties and Structure of Ignition-Proof Mg–Ca–Zr Alloys Produced by Squeeze Casting

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Abstract

The effects of calcium and zirconium additions on the microstructures and mechanical properties have been investigated in the squeeze-cast ignition-proof magnesium alloys. The marked grain refining is achieved by the combined addition of calcium and zirconium because calcium promotes the dissolution of zirconium into the magnesium melt. The tensile strength and 0.2% proof stress of the magnesium alloys containing calcium are increased by grain refining. The combined addition of calcium and zirconium is also effective for the grain refining in the Mg–Y alloys. The ignition-proof Mg–Y–Ca–Zr alloys have good room-temperature strength and elevated-temperature strength which are maintained up to 473 K. The combined addition of calcium and zirconium higher than about 1% causes remarkable grain refining and improvements in tensile strength and 0.2% proof stress of the Mg–Zn alloys at room temperature.

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