Hostname: page-component-857557d7f7-zv5th Total loading time: 0 Render date: 2025-12-05T01:36:48.675Z Has data issue: false hasContentIssue false
  • English
  • Français

Kear-Wilsdorf Locks and Mechanical Properties of L12 Alloys

Published online by Cambridge University Press:  01 January 1992

Georges Saada  and
Patrick VeyssiÈre
Georges Saada
Affiliation:
LEM* , CNRS-ONERA, BP 72. 92322 Châtillon Cedex, France.
Patrick VeyssiÈre
Affiliation:
LEM* , CNRS-ONERA, BP 72. 92322 Châtillon Cedex, France.
Get access

Abstract

There is no generally accepted model of the atypical mechanical properties of L12 alloys such as the flow stress peak. Since its introduction in the early sixties, the so-called Kear-Wilsdorf (KW) lock has played a central role in the analysis of the mechanical properties of this category of alloys. We analyze the mechanical stability of a split configuration, intermediate between the superdislocation fully extended in the primary slip plane and the KW lock. The influence of composition on mechanical properties is stressed, based on experimental determinations of the flow stress dependencies upon load orientation when composition is varied.

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 288: Symposium L – High-Temperature Ordered Intermetallic Alloys V , 1992 , 411
Copyright
Copyright © Materials Research Society 1995

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable

References

REFERENCES

[1] Paidar, V., Pope, D.P. and Vitek, V., Acta metall. 32 (1984) 435.Google Scholar
[2] Vitek, V., in Dislocations and the Properties of Real Materials, edited by The Institute of Metals (Arrowsmith, Bristol, 1985), p. 30.Google Scholar
[3] Pope, D.P., in High Temperature Aluminides & Intermetallics, edited by Whang, S.H., Liu, C.T., Pope, D.P. and Stiegler, J.O. (TMS Publication, 1990), p. 51.Google Scholar
[4] Kantha, M., Cserti, J. and Vitek, V., Scripta Met. Mater., 27 (1992) 487.Google Scholar
[5] Bontemps-Neveu, C. PhD Thesis. University of Paris Sud (France) (1991).Google Scholar
[6] Heredia, F.E., PhD Thesis, University of Pennsylvania (1990).Google Scholar
[7] Saada, G., and Veyssière, P., Phil. Mag. A, 66 (1992) in press.Google Scholar
[8] Hirsch, P.B., J. Phys. III 1 (1991) 989; Phil. Mag. A 65 (1992) 569 ; in Ordered Intermetallics - Physical Metallurgy and Mechanical Behaviour, edited by C.T. Liu, R.W. Cahn and G. Sauthoff (Kluwer Academic Publishers, The Nederlands : NATO ASI series, 1992), p. 47 ; Progr. Mater. Sci., 26 (1992) 63.Google Scholar
[9] Yoo, M.H., Scripta Met., 20 (1986) 915.Google Scholar
[10] Couret, A. and Caillard, D., Phil. Mag. Letters, (1992) in press.Google Scholar
[11] Veyssière, P., in Ordered Intermetallics - Physical Metallurgy and Mechanical Behaviour, edited by Liu, C.T., Cahn, R.W. and Sauthoff, G. (Kluwer Academic Publishers, The Nederlands: NATO ASI series, 1992), p. 165.Google Scholar
[12] Sun, Y.Q., PhD Thesis. University of Oxford (1990).Google Scholar
[13] Takeuchi, S. and Kuramoto, E., Acta Met., 21 (1973) 415.Google Scholar
[14] Vitek, V. and Sodani, Y., Scripta Met mater., 25 (1991) 939.Google Scholar
[15] Kantha, M., Cserti, J. and Vitek, V., Scripta Met. Mater., 22 (1992) 481.Google Scholar
[16] Saada, G. and Douin, J., Phil. Mag. Lett., 64 (1991) 67.Google Scholar
[17] Vitek, V., private comunication (1992).Google Scholar
[18] Bonneville, J., Baluc, N. and Martin, J.L., in Intermetallic Compounds -Structure and Mechanical Properties, ed. Izumi, O. (Sendai, Japan: The Japan Institute of Metals, 1991), p. 323. Bonneville, J., and Martin, J.L., High-Temperature Ordered Intermetallic Alloys IV, MRS Proceedings, 213. ed. Johnson, L.A., Pope, D.P. and Stiegler, J.O. (Pittsburg, PA: Materials Research Society, 1991), p. 629.Google Scholar
[19] Baluc, N., Bonneville, J., Martin, J.L. and Späetig, P., Mater. Sci. & Engg. A, (1993) in press.Google Scholar
[20] Mills, M.J. and Chzran, D.C, Acta Met., 40 (1992) 3051.Google Scholar
[21] Saada, G., and Veyssière, P., Mater. Sci. & Engg. A, (1993) in press.Google Scholar
[22] Bontemps, C., C. and P. Veyssière, Phil. Mag. A., 61 (1990) 259.Google Scholar
[23] Saada, G. and Veyssière, P., Phil. Mag. Letters., 64 (1991) 365.Google Scholar
[24] Hemker, K., Mills, M.J. and Nix, W.D., Acat Met., 39 (1992) 1901.Google Scholar