Hostname: page-component-cd9895bd7-gvvz8 Total loading time: 0 Render date: 2024-12-28T01:15:22.522Z Has data issue: false hasContentIssue false
  • English
  • Français

Critical concentration of Mg addition for plastic instabilities in Al–Mg alloys

Published online by Cambridge University Press:  31 January 2011

N. Q. Chinh ,
F. Csikor ,
Zs. Kovács  and
J. Lendvai
N. Q. Chinh
Affiliation:
Department of General Physics, Eötvös University, H-1518 Budapest, POB 32, Hungary
F. Csikor
Affiliation:
Department of General Physics, Eötvös University, H-1518 Budapest, POB 32, Hungary
Zs. Kovács
Affiliation:
Department of General Physics, Eötvös University, H-1518 Budapest, POB 32, Hungary
J. Lendvai
Affiliation:
Department of General Physics, Eötvös University, H-1518 Budapest, POB 32, Hungary
Get access

Abstract

Plastic instabilities were investigated by the depth-sensing microhardness test in binary high-purity Al–Mg alloys with different Mg contents. During the tests the applied load was increased from 0 to 2000 mN at constant loading rate. The instabilities appeared as characteristic steps in the load–depth curves during indentation. It was shown that the occurrence and development of the plastic instabilities depend strongly on the solute content. Furthermore, the plastic instabilities occurred only when the solute concentration was larger than a critical value, C0. From room-temperature tests on Al–Mg alloys, C0 was found to be 0.86 wt% Mg. The critical concentration, which is necessary to get plastic instabilities, was also interpreted theoretically.

Type
Rapid Communications
Information
Journal of Materials Research , Volume 15 , Issue 5 , May 2000 , pp. 1037 - 1040
Copyright
Copyright © Materials Research Society 2000

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.)

References

REFERENCES

1.Neuhäuser, H. and Schwink, C., in Materials Science and Technology, edited by Cahn, R.W., Haasen, P., and Kramer, E.J. and Vol. 6 edited by Mughrabi, H. (VCH, Weinheim, Germany, 1993), p. 191.Google Scholar
2.McCormick, P.G., Scr. Metall. 15, 441 (1982).CrossRefGoogle Scholar
3.Pink, E. and Grinberg, A., Acta Metall. 30, 2153 (1982).CrossRefGoogle Scholar
4.Kubin, L.P., Chihab, K., and Estrin, Y., Acta Metall. 36, 2707 (1988).CrossRefGoogle Scholar
5.McCormick, P.G., Venkadesan, S., and Ling, C.P., Scr. Metall. 29, 1159 (1993).CrossRefGoogle Scholar
6.Lukácĉ, P., Balik, J., and Chmelik, F., Mater. Sci. Eng. A 234/236, 45 (1997).CrossRefGoogle Scholar
7.Bérces, Gy., Chinh, N.Q., Juhász, A., and Lendvai, J., J. Mater. Res. 13, 1411 (1998).CrossRefGoogle Scholar
8.Bérces, Gy., Chinh, N.Q., Juhász, A., and Lendvai, J., Acta Metall. 46, 2029 (1998).Google Scholar
9.McCormick, P.G., Acta Metall. 20, 351 (1972).CrossRefGoogle Scholar
10.Kubin, L.P. and Estrin, Y., Acta Metall. 38, 697 (1990).CrossRefGoogle Scholar
11.Lebyodkin, M.A., Brechet, Y., Estrin, Y., and Kubin, L.P., Phys. Rev. Lett. 74, 4758 (1995).CrossRefGoogle Scholar
12.Král, R., Lukáĉ, P., and Janeĉek, M., Mater Sci. Forum 217/222, 1025 (1996).CrossRefGoogle Scholar
13.McCormick, P.G., Acta Metall. 19, 463 (1971).CrossRefGoogle Scholar
14.van den Brink, S.H., and McCormick, P.G., Phys. Status Solidi A 41, 513 (1977).CrossRefGoogle Scholar
15.Mulford, R.A. and Kocks, U.F., Acta Metall. 27, 1125 (1979).CrossRefGoogle Scholar
16.Cottrell, A.H., Philos. Mag. 44, 829 (1953).CrossRefGoogle Scholar
17.Brechet, Y. and Estrin, Y., Acta Metall. 43, 955 (1995).CrossRefGoogle Scholar
18.Louat, N., Scr. Metall. 15, 1167 (1981).CrossRefGoogle Scholar