Effect of Strain Rate on the Plastic Behaviour of Ll2 Compounds Based on Ni3Al

Abstract

In both single and polycrystalline Ni3Al, no strain rate dependence of 0.2% flow stress is observed in a temperature range where anomalous positive temperature dependence of strength is exhibited. A distinct strain rate dependence is observed, however, in single crystals when the test temperature is raised beyond the peak in flow stress. It is shown that (111) type slip involving diffusional process is responsible for the strain rate sensitivity at near [001] orientation, while (001) type slip which is governed by the Peierls mechanism at orientations away from [001]. In polycrystalline compound with a fine grain size an apparent loss of the positive temperature dependence of strength is observed at a slower strain rate due to grain boundary sliding.

This is a preview of subscription content, access via your institution.

References

  1. [1]

    C. Lall. S. Chin and D.P. Pope, Met. Trans. A 10A, 1323 (1979).

    Google Scholar 

  2. [2]

    S.S. Ezz, D.P. Pope and V. Vitek, Acta Met. 30, 921 (1982).

    CAS  Article  Google Scholar 

  3. [3]

    Y. Umakoshi, D.P. Pope and V. Vitek, Acta Met. 32, 449 (1984).

    CAS  Article  Google Scholar 

  4. [4]

    P.H. Thornton, R.G. Davies and T.L. Johnston, Met. Trans. 1, 207 (1970).

    CAS  Google Scholar 

  5. [5]

    G.R. Leverant, M. Gell and S.W. Hopkins, Mater. Sci. Eng. 8, 125 (1971).

    CAS  Article  Google Scholar 

  6. [6]

    N.T. Travina, A.A. Nitikin and N.A. Lunia, Sov. Phys. Dokl. 21,459 (1976).

  7. [7]

    S. Ochiai, S. Miura, Y. Mishima and T. Suzuki, J. Japan Inst. Metals, 51, 608 (1987).

    CAS  Article  Google Scholar 

  8. [8]

    S. Miura, S. Ochiai, Y. Oya, Y. Mishima and T. Suzuki, Ibid. 51, 400 (1987).

    Google Scholar 

  9. [9]

    Y. Oya, Y. Mishima, K. Yamada and T. Suzuki, Tetsu-to-Hagane 70, 1870 (1984).

    CAS  Article  Google Scholar 

  10. [10]

    M.M.P.Janssen, Met. Trans. 4, 1623 (1973).

    CAS  Google Scholar 

  11. [11]

    R.A.Swalin and A.Martin, J. metals 8, 567 (1956).

    CAS  Google Scholar 

  12. [12]

    H.Conrad, J.Metals 16, 582 (1964).

    CAS  Google Scholar 

Download references

Author information

Affiliations

Authors

Corresponding author

Correspondence to Seiji Miura.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Miura, S., Ochiai, S., Oya, Y. et al. Effect of Strain Rate on the Plastic Behaviour of Ll2 Compounds Based on Ni3Al. MRS Online Proceedings Library 133, 341 (1988). https://doi.org/10.1557/PROC-133-341

Download citation