Mechanical properties of Co-based L1[2] intermetallic compound Co3(Al,W)

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  • Miura Seiji
    Division of Materials Science and Engineering, Graduate School of Engineering, Hokkaido University
  • Ohkubo Kenji
    Division of Materials Science and Engineering, Graduate School of Engineering, Hokkaido University
  • Mohri Tetsuo
    Division of Materials Science and Engineering, Graduate School of Engineering, Hokkaido University

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  • Mechanical Properties of Co-Based L1<SUB>2</SUB> Intermetallic Compound Co<SUB>3</SUB>(Al,W)

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Mechanical properties of L12-Co3(Al,W) polycrystalline sample are investigated by compression testing at various temperature ranging from room temperature to 1193 K. It was found that at room temperature the 0.2% flow stress is 410 MPa and the compressive ductility is higher than 10%, whereas at 1193 K the 0.2% flow stress is 382 MPa and the compressive ductility is about 10%. Two candidates for the reaction scheme of the Co-rich region of the Co-Al-W ternary phase diagram are proposed by combining the results of microstructure observation, X-ray diffractometry and the previous report.

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