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Dislocations with Non-Planar Locked Structures in the L12 Ordered Alloys

Published online by Cambridge University Press:  26 February 2011

Y.Q. Sun ,
P.M. Hazzledine  and
M.A. Crimp
Y.Q. Sun
Affiliation:
Department of Materials, University of Oxford, United Kingdom.
P.M. Hazzledine
Affiliation:
Department of Materials, University of Oxford, United Kingdom.
M.A. Crimp
Affiliation:
Department of Materials, University of Oxford, United Kingdom.
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Abstract

In the L12 structure, the Kear-Wilsdorf lock on screw superdislocations is the best known example of a dislocation with a non-planar locked structure. Recent high resolution TEM work on Ni3Al and Ni3Ga has shown locked structures on the following dislocations: 30-degree <112>/3 super-Shockley partials, edge <110> {001} dislocations, and 45-degree <100>{001} dislocations. Dislocation reactions among intersecting <100>{001} and <110>{001} slip systems have also been found to form product dislocations with locked structures. This paper summarizes these locked structures and outlines their effects on the operation of related slip systems.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 213: Symposium Q – High-Temperature Ordered Intermetallic Alloys IV , 1990 , 311
Copyright
Copyright © Materials Research Society 1991

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References

REFERENCES

[1] Kear, B.H. and Wilsdorf, H.G., Trans. AIME 224, 382 (1962).Google Scholar
[2] Pope, D.P. and Ezz, S.S., Int. Metals. Rev. 29, 136 (1984).Google Scholar
[3] Giamei, A.F., Oblak, J.M., Kear, B.H. and Rand, W.H., Proc. 29th Ann. Meeting, The Electron Microscopy Soc. of America (1971, p. 112.Google Scholar
[4] Pak, H., Saburi, T. and Nennon, S., Scripta Metall. 10, 1081 (1976).CrossRefGoogle Scholar
[5] Suzuki, T., Ichihara, M. and Takeuchi, S., Acta Metall. 27, 193 (1979).CrossRefGoogle Scholar
[6] Sun, Y.Q., Hazzledine, P.M. and Crimp, M.A., to be published in Phil. Mag.Google Scholar
[7] Baluc, N., Karnthaler, H.P. and Mills, M.J., Inst. Phys. Conf. Ser. No.93, Vol.2, 463 (1988).Google Scholar
[8] Crimp, M.A., Phil. Mag. Letters 60, 45 (1989).Google Scholar
[9] Lomer, W.M., Phil. Mag. 42, 1327 (1951).Google Scholar
[10] Cottrell, A.H., Phil. Mag. 43, 645 (1952).Google Scholar
[11] Sun, Y.Q., Hazzledine, P.M., Crimp, M.A. and Couret, A., submitted to Phil. Mag.Google Scholar
[12] Sun, Y.Q., D.Phil. Thesis, University of Oxford, 1990.Google Scholar
[13] Sun, Y.Q. and Hazzledine, P.M., MRS Proceeding on High Temperature Ordered Intermetallic Alloys 1989, p. 197.Google Scholar