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Phase Stability and Mechanical Properties of Multi-Phase Alloys Based on the B2 CoA1 and the E21 Co3AlC

Published online by Cambridge University Press:  22 February 2011

Yoshisato Kimura ,
Masaru Takahashi ,
Seiji Miura  and
Yoshinao Mishima
Yoshisato Kimura
Affiliation:
Graduate student, Materials Science and Engineering, Tokyo Inst. Tech., Yokohama, Japan, Dept. of Metall. Eng., Tokyo Inst. of Tech., Tokyo, Japan,
Masaru Takahashi
Affiliation:
Graduate student, Materials Science and Engineering, Tokyo Inst. Tech., Yokohama, Japan, Kawasaki Heavy Ind., Chiba, Japan.
Seiji Miura
Affiliation:
Precision and Intelligence Lab., Tokyo Inst. of Tech., Yokohama, Japan. Now with
Yoshinao Mishima
Affiliation:
Precision and Intelligence Lab., Tokyo Inst. of Tech., Yokohama, Japan. Now with
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Abstract

The Co-Al-C ternary phase diagram has been experimentally examined for the Co-corner with a particular interest in phase relations among B2 type intermetallic compound, the E21 type Co3AlC, and cobalt primary solid solution, denoted as (Co). Reaction scheme, liquidus surface, isothermal sections and isoplethals at constant concentration were determined. Mechanical properties of the B2/E21/(Co) three-phase alloys were investigated by compression tests carried out at a temperature range from 77 to 1273 K, and by tensile tests at room temperature. It has been revealed that both excellent ambient temperature ductility and sufficient high temperature strength can be achieved by proper choice of alloy compositions.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 364: Symposium L – High-Temperature Ordered Intermetallic Alloys–VI , 1994 , 1371
Copyright
Copyright © Materials Research Society 1995

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