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Mechanical properties of nickel beryllides

Published online by Cambridge University Press:  31 January 2011

T. G. Nieh ,
J. Wadsworth  and
C. T. Liu
T. G. Nieh
Affiliation:
Lockheed Missiles and Space Co., Inc., Research and Development Division, 0/93-10, B/204, 3251 Hanover Street, Palo Alto, California 94304
J. Wadsworth
Affiliation:
Lockheed Missiles and Space Co., Inc., Research and Development Division, 0/93-10, B/204, 3251 Hanover Street, Palo Alto, California 94304
C. T. Liu
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831-6115
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Abstract

The elastic properties of nickel beryllide have been evaluated from room temperature to 1000 °C. The room temperature modulus is measured to be 186 GPa, which is relatively low by comparison with other B2 aluminides such as NiAl and CoAl. Hardness measurements were carried out on specimens that had compositions over the range from 49 to 54 at. % Be, using both a Vickers microhardness tester and a nanoindentor. It was found that the hardness of NiBe exhibits a minimum at the equiatomic composition. This behavior is similar to that of aluminides of the same crystal structure, e.g., NiAl and CoAl. The effect of interstitial oxygen on the hardness of NiBe has also been studied and the results show that the presence of oxygen in NiBe can cause a significant increase in hardness. It is demonstrated that the hardness increase for the off-stoichiometric compositions is primarily caused by interstitial oxygen and can only be attributed partially to anti-site defects generated in off-stoichiometric compositions. Nickel beryllides appear to have some intrinsic room temperature ductility, as evidenced by the absence of cracking near hardness indentations.

Type
Articles
Information
Journal of Materials Research , Volume 4 , Issue 6 , December 1989 , pp. 1347 - 1353
Copyright
Copyright © Materials Research Society 1989

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References

REFERENCES

1Liu, C.T.Inter. Metals Rev. 29, 168 (1984).Google Scholar
2Lall, C.Chin, S. and Pope, D. P.Metall. Trans. A10A, 1323 (1979).Google Scholar
3Liu, C. T. and Stiegler, J. O.Science 226, 636 (1984).Google Scholar
4Lipsitt, H.A.Shechtman, D. and Schafrik, R. E.Metall. Trans. A6A, 1991 (1975).Google Scholar
5Ball, A. and Smallman, R.E.Acta Metall. 14, 1517 (1966).Google Scholar
6Stonehouse, A. J.Paine, R. M. and Beaver, W. W. in Mechanical Properties of Intermetallic Compounds, edited by Westbrook, J. H. (John Wiley and Sons, Inc., New York, 1960), p. 297.Google Scholar
7Hahn, K. H. and Vedula, K.Scripta Metall. 23, 7 (1989).CrossRefGoogle Scholar
8Liu, C.T.White, C.L.Koch, C.C. and Lee, E.H. in High Temperature Materials Chemistry II, edited by Cubicciotti, Munir (The Electrochemical Soc. Inc. Proc. 1983), Vol. 83-7, p. 32.Google Scholar
9Aoki, K. and Izumi, O.Nippon Kinzoku Gakkaishi 43, 1190 (1979).Google Scholar
10Rozner, A. G. and Wasilewski, R. J.J. Inst. Metals 94, 169 (1966).Google Scholar
11Phase Diagrams of Binary Beryllium Alloys, edited by Okamoto, H. and Tanner, L.E. (ASM INTERNATIONAL, Metals Park, OH, 1987), p. 134.Google Scholar
12Grala, E. M. in Mechanical Properties of Intermetallic Compounds, edited by Westbrook, J. H. (John Wiley and Sons, Inc., New York, 1960), p. 358.Google Scholar
13Westbrook, J.H.J. Electrochem. Soc. 103, 54 (1956).Google Scholar
14Harmouche, M.R. and Wolfenden, A.J. Testing and Evaluation, JTEVA, 13, No. 6, 424 (1985).CrossRefGoogle Scholar
15Pethica, J. B.Hutchings, R. and Oliver, W. C.Phil. Mag. 48A, No. 4, 593 (1983).CrossRefGoogle Scholar
16Harmouche, M. R. and Wolfenden, A.Mater. Sci. Engr. 84, 35 (1986).CrossRefGoogle Scholar
17Harmouche, M.R. and Wolfenden, A.J. Testing and Evaluation, JTEVA, 15, No. >2, 101 (1987).CrossRef2,+101+(1987).>Google Scholar
18Oriani, R. A.Acta Metall. 12, 1399 (1964).CrossRefGoogle Scholar
19Misch, L.Z. Phys. Chem. B29, 42 (1935).Google Scholar
20Bradley, A. J. and Seager, G.C.J. Inst. Met. 64, 81 (1937).Google Scholar
21Bradley, A. J. and Taylor, A.Proc. Roy. Soc. A159, 56 (1937).Google Scholar
22Cooper, M.J.Phil. Mag. 89, 805 (1963).Google Scholar
23Ratka, J.O.Sethi, V. K. and Gibala, R. in Mechanical Properties of BCC Metals, edited by Meshii, M. (TMS-AIME, Warrendale, PA, 1982), p. 103.Google Scholar
24Tottle, C.R.J. Inst. Metals 85, 375 (1956-1957).Google Scholar
25Fountain, R. W. and McKinsey, C. R. in Columbium and Tantalum, edited by Sisco, F.T. and Epremian, E. (John Wiley and Sons, Inc., New York, 1963), p. 198.Google Scholar
26Gebhardt, E.Seghezzi, H.D., and Durrschnabel, W. in Plansee Proc. 1985-High Melting Metals, edited by Reutte, A. G. (Metallwerk Plansee, Tyrol, 1959), p. 291.Google Scholar
27Wert, C. A.Trans. AIME 188, 1242 (1950).Google Scholar
28Evans, P. R. V.J. Less-Common Metals 4, 78 (1962).Google Scholar
29Fleisher, R.L. and Hibbard, W. R. Jr. , in Conference on Relation of Structure to Mechanical Properties of Metals (H. M. Stationery Office, London, 1963), p. 261.Google Scholar
30Takasugi, T.Masahashi, N. and Izumi, O.Scripta Metall. 20, 1317 (1986).CrossRefGoogle Scholar
31Huang, S. C.Taub, A. I. and Chang, K.M.Acta Metall. 32, 1703 (1984).CrossRefGoogle Scholar
32Rawlings, R. D. and Staton-Bevan, A. E., J. Mater. Sci. 10, 505 (1975).CrossRefGoogle Scholar
33Huang, S. C.J. Mater. Res. 1, 60 (1986).CrossRefGoogle Scholar