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Characteristic Mechanical Properties and Phase Stability of L12 Intermetallic Compounds

Published online by Cambridge University Press:  21 February 2011

Yoshinao Mishima ,
Yoshihiro Oya  and
Tomoo Suzuki
Yoshinao Mishima
Affiliation:
Research Laboratory of Precision Machinery and Electronics, Tokyo Institute of Technology Nagatsuta, Midori-ku, Yokohama 227, Japan
Yoshihiro Oya
Affiliation:
Research Laboratory of Precision Machinery and Electronics, Tokyo Institute of Technology Nagatsuta, Midori-ku, Yokohama 227, Japan
Tomoo Suzuki
Affiliation:
Research Laboratory of Precision Machinery and Electronics, Tokyo Institute of Technology Nagatsuta, Midori-ku, Yokohama 227, Japan
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Abstract

The present paper deals with the occurence and magnitude of characteristic mechanical anomalies observed in many L12 intermetallic compounds and their relation to the phase stability of the crystal structure against other geometrically closed packed(GCP) phases. The dislocation configurations in the crystal structure and resultant plastic behavior are in close relation with anti-phase boundary(APB) and stacking fault(SF) energies in the compounds, while the relative magnitude of these energies on various crystallographic planes actually determines the phase stability of the L12 crystal structure. It is shown here, based on our series of investigations carried out over the past decade, that the general tendencies for particular deformation modes to occur can be systematically interpreted in terms of alloy chemistry of the compounds, including variables such as combination of component species, nonstoichiometry and ternary additions in the compounds, all of which affect the stability of the phase.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 39: Symposium G – High-Temperature Ordered Intermetallic Alloys I , 1984 , 263
Copyright
Copyright © Materials Research Society 1985

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References

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