Abstract
Superplasticity — the ability of a material to sustain large plastic deformation — has been demonstrated in a number of metallic, intermetallic and ceramic systems. Conditions considered necessary for superplasticity1 are a stable fine-grained microstructure and a temperature higher than 0.5 T m (where T m is the melting point of the matrix). Superplastic behaviour is of industrial interest, as it forms the basis of a fabrication method that canbeused to produce components having complex shapes from materials that are hard to machine, such as metal matrix composites and intermetallics. Use of superplastic forming may become even more widespread if lower deformation temperatures can be attained. Here we present observations of low-temperature superplasticity in nanocrystalline nickel, a nanocrystalline aluminium alloy (1420-Al), and nanocrystalline nickel aluminide (Ni3Al). The nanocrystalline nickel was found to be superplastic ata temperature 470 °C below that previously attained2: this corresponds to 0.36T m, the lowest normalized superplastic temperature reported for any crystalline material. The nanocrystalline Ni3Al was found to be superplastic at a temperature 450 °C below the superplastic temperature in the microcrystalline regime3.
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References
Mukherjee, A. K. in Materials Science and TechnologyVol. 6, Plastic Deformation and Fracture of Materials (ed. Mughrabi, H.) Ch. 9 (VCH, New York, 1993).
Floreen, S. Superplasticity in pure nickel. Scripta Metall. 1, 19–23 (1967).
Mukhopadhyay, J., Kashner, G. & Mukherjee, A. K. Superplasticity in boron doped Ni3Al alloy. Scripta Metall. Mater. 24, 857–862 (1990).
Gleiter, H. Nanocrystalline materials. Prog. Mater. Sci. 33, 223–315 (1989).
Suryanarayana, C. Nanocrystalline materials. Int. Mater. Rev. 40, 41–64 (1995).
Valiev, R. Z. Ultrafine-grained materials produced by severe plastic deformation. Ann. Chim. 21, 6–7, 369–378 (1996).
Birringer, R. & Gleiter, H. in Encyclopedia of Material Science and Engineering: Supplement 1 (eds Cahn, R. W. & Beaver, M. B.) 339–349 (Pergamon, Oxford, 1988).
El-Sherik, A. M. & Erb, U. Synthesis of bulk nanocrystalline nickel by pulsed electrodeposition. J.Mater. Sci. 30, 5743–5749 (1995).
Wang, N., Wang, Z., Aust, K. T. & Erb, U. Isokinetic analysis of nanocrystalline nickel electrodeposits upon annealing. Acta Mater. 45, 1655–1669 (1997).
Natter, H., Schmeltzer, M. & Hempelmann, R. Nanocrystalline nickel and nickel copper alloys: Synthesis, characterisation, and thermal stability. J. Mater. Res. 13, 1186–1197 (1998).
Everhart, J. L. Engineering Properties of Nickel and Nickel Alloys 20 (Plenum, New York, 1971).
Liu, V. T. & Sikka, V. Nickel aluminides for structural use. J. Metals 38, 19–21 (1987).
Berbon, P. B. et al. Fabrication of bulk ultrafine-grained materials through intense plastic straining. Metall. Mater. Trans. A 29, 2237–2243 (1998).
Kaybyshev, O. A. & Mareklov, A. A. Structural changes during superplastic deformation of nickel and chromium. Fiz. Metal. Metalloved. 41, 190–196 (1976).
Acknowledgements
This work was supported by the US National Science Foundation and the Civil Research and Development Foundation.
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McFadden, S., Mishra, R., Valiev, R. et al. Low-temperature superplasticity in nanostructured nickel and metal alloys. Nature 398, 684–686 (1999). https://doi.org/10.1038/19486
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DOI: https://doi.org/10.1038/19486
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