Hostname: page-component-76fb5796d-2lccl Total loading time: 0 Render date: 2024-04-29T20:15:54.434Z Has data issue: false hasContentIssue false
  • English
  • Français

Preparation and Mechanical Properties of Ultrafine Grained Metals

Published online by Cambridge University Press:  28 February 2011

B. Gunther ,
A. Baalmann  and
H. Weiss
B. Gunther
Affiliation:
Fraunhofer-Institute for Applied Materials Research, Lesumer Heerstr. 36, 2820 Bremen 77, F.R.G.
A. Baalmann
Affiliation:
Fraunhofer-Institute for Applied Materials Research, Lesumer Heerstr. 36, 2820 Bremen 77, F.R.G.
H. Weiss
Affiliation:
Fraunhofer-Institute for Applied Materials Research, Lesumer Heerstr. 36, 2820 Bremen 77, F.R.G.
Get access

Abstract

Ultrafine—grained polycrystalline metallic components (Cu, Au, Fe) have been prepared by means of the inert gas evaporation technique combined with an integrated uniaxial cold compaction device. The average grain sizes ranaed typically from 20 nm to about 100 nm. The microstructure and Imourity content of the as-pressed samples have been investigated by means of TEM and AES, respectively. The yield strength of ultrafine (30 nm) grained Cu specimens obtained in tensile tests compares well with respective values for heavily cold—worked coarse grained copper. Al slight heat treatment (150ºC/30min) improves the strain—to—fracture at slightly reduced yield strength values. The results are discussed within the picture of two concurrent processes determining the strength of ultrafine grained metals: Coble creep vs. grain boundary strengthening effect.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 195: Symposium S – Physical Phenomena in Granular Materials , 1990 , 611
Copyright
Copyright © Materials Research Society 1990

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. Hall, E.O., Proc. Phys. Soc., London, 64B, 747 (1951) N.J. Petch, J. Iron Steel Inst., 174, 25 (1953)Google Scholar
2. Thompson, A.W., Saxton, H.J., Met. Trans. 4, 1599 (1973) A.W. Thompson, Act. met. 23, 1337 (1975)Google Scholar
3. Horvath, J., Birringer, R., Gleiter, H., Solid State Comm. 62, 319 (1987)Google Scholar
4. Granqvist, C.G., Buhrmann, R.A., J. appl. phys. 47, 2200 (1976)Google Scholar
5. Wunderlich, W., Ishida, Y., Maurer, R., Scripta Metall. 24, 403 (1990)Google Scholar
6. Jorra, E. et al. , Phil. mag. B 60, 159 (1989)Google Scholar
7. Gleiter, H., Marquardt, P., Z. Metallkde. 75, 263 (1984)Google Scholar
8. Khazin, M.L., Smirnov, B.N., Kitaev, G.A., sov. J. non-ferrous met. 26, 91 (1985)Google Scholar
9. Chokshi, A.H. et al. , ScriptaiMetall. 23, 1679 (1989)Google Scholar
10. Coble, R.L., J. appl. phys. 34, 1679 (1963)Google Scholar