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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.48  No.9 (2007)  >  pp.2403-2408

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Mechanical Properties of Co-Based L12 Intermetallic Compound Co3(Al,W)

Seiji Miura1), Kenji Ohkubo1) and Tetsuo Mohri1)
1) Division of Materials Science and Engineering, Graduate School of Engineering, Hokkaido University

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.

cobalt alloys, intermetallic compounds, high temperature deformation, phase diagram

Received: April 24, 2007
Accepted: July 03, 2007 , Published online: August 25, 2007
Copyright (c) 2007 The Japan Institute of Metals



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