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Superplasticicity of Cu–16 at.% Ag microcomposites

Published online by Cambridge University Press:  31 January 2011

S. I. Hong  and
H. J. Kwon
S. I. Hong
Affiliation:
Department of Metallurgical Engineering, Chungnam National University, Taedok Science Town, Taejon 305-764, Korea
H. J. Kwon
Affiliation:
Department of Metallurgical Engineering, Chungnam National University, Taedok Science Town, Taejon 305-764, Korea
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Abstract

Superplastic behavior of heavily drawn Cu–at.% Ag filamentary microcomposite wires was investigated. The filamentary microstructure tended to break up at high temperatures by spheroidization, grooving, and/or recrystallization because of its high interface energy and high cold-work energy. Above 400 °C, extensive recrystallization occurred and the grains 300–500 nm in size were observed in the Cu matrix. As the deformation proceeded, the elongated silver lamellae and/or the region with numerous filaments broke up and rearranged into chevron patterns, which mostly lay perpendicular to the loading axis. The elongation up to 1000% was obtained at 500 °C at the strain rates of 7 × 10−4/s and −3 × 10−3/s, and the elongation up to 600% was obtained at 400 °C at the strain rate of 1 × 10−4/s. Arrays of dislocations in the matrix and near grain and phase boundaries were observed after superplastic deformation, supporting the slip-accommodated grain and/or phase boundary sliding.

Type
Articles
Information
Journal of Materials Research , Volume 16 , Issue 6 , June 2001 , pp. 1822 - 1828
Copyright
Copyright © Materials Research Society 2001

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References

REFERENCES

1.Hong, S.I. and Hill, M.A., Acta Metall. Mater. 46, 4111 (1998).Google Scholar
2.Sakai, Y., Inoue, K., Asano, T., Wada, H., and Maeda, H., Appl. Phys. Lett. 59, 2965 (1991).CrossRefGoogle Scholar
3.Sakai, Y. and Schneider-Muntau, H.J., Acta Metall. Mater. 45, 1017 (1997).Google Scholar
4.Frommeyer, G. and Wassermann, G., Acta Metall. 23, 1353 (1975).Google Scholar
5.Bengalem, A. and Morris, D.G., Acta Metall. Mater. 45, 397 (1997).CrossRefGoogle Scholar
6.Hong, S.I. and Hill, M.A., Mater. Sci. Eng. A 264, 151 (1999).CrossRefGoogle Scholar
7.Livesey, D.W. and Ridley, N., Metall. Trans. 13A, 1619 (1982).CrossRefGoogle Scholar
8.Shei, S.A. and Langdon, T.G., Acta Metall. 26, 1153 (1978).Google Scholar
9.Shei, S.A. and Langdon, T.G., Acta Metall. 26, 639 (1978).CrossRefGoogle Scholar
10.Pilling, J. and Ridley, N., Superplasticity in Crystalline Solids (The Inst. of Metals, Camelot Press, Southampton, United Kingdom, 1989), p. 44.Google Scholar
11.Higashi, K., Ohnishi, T., and Nakatami, Y., Scripta Metall. 19, 821 (1985).CrossRefGoogle Scholar
12.Cline, H.E. and Lee, D., Acta Metall. 18, 315 (1970).Google Scholar
13.Malzhan Kampe, J.C., Courtney, T.H., and Leng, Y., Acta Metall. 37, 1735 (1989).Google Scholar
14.Hong, S.I. and Hill, M.A., Mater. Sci. Eng. A 281,189 (2000).CrossRefGoogle Scholar
15.Hong, S.I. and Hill, M.A., Scripta Mater. 42, 737 (2000).Google Scholar
16.Hong, S.I., J. Mater. Res. 15, 1889 (2000).Google Scholar
17.Ashby, M.F. and Verrall, R.A., Acta Metall. 21, 149 (1973).Google Scholar
18.Kubaschewski, O., Trans. Faraday Soc. 46, 713 (1950)CrossRefGoogle Scholar
19.Cahoon, J.R. and Youdelis, W.V., Trans Met. Soc. AIME 239, 127 (1967).Google Scholar