Abstract
The mechanical response of various combinations of non-linear viscous elements (dashpots) is analysed in this paper. It is assumed that the properties of i-th element can be described by the relation σi = K i ξ mii , where σ i is the stress, ξi is the strain rate, Ki and mi are constants 0 ≤ mi ≤ 1). Parallel, series and combined combinations are considered. The main object is to find out the potential for various combinations to describe the sigmoidal variation of the flow stress, σ, with the strain rate, ξ, which is a typical feature of superplastic materials. It is found that elements are connected in parallel as well as elements are connected in series are characterised by non-sigmoidal dependency of the net stress σ on the net strain rate ξ. At the same time a mixed combination with two elements in parallel connected with a third one in series is shown to describe the sigmoidal curve with reasonable accuracy.
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References
J. W. Edington, K. N. Melton and C. P. Cutler, Progress in Materials Science 21 (1976) 63.
T. G. Langdon, Metal. Trans. 13A (1982) 689.
K. A. Padmanabhan and J. J. Davies, “Superplasticity,” (Springer-Verlag, Berlin, Germany, 1980) p. 314 c.
J. Pilling and N. Ridley, “Superplasticity in Crystalline Solids,” The Institute of Metals (The Camelot Press, London, 1989).
O. D. Sherby and J. Wadsworth, Progr. In Mat. Sci. 33 (1989) 169.
O. A. Kaibyshev, “Superplasticity in Alloys, Intermetallides and Ceramics,” (Springer-Verlag, Berlin, Heidelberg, 1992) p. 317.
J. Hedworth and M. J. Stowell, J. Mater. Sci. 6 (1971) 1061.
F. U. Enikeev and M. I. Mazurski, Scripta Metall. 32 (1995) 1.
R. A Vasin, F. U. Enikeev and M. I. Mazurski, Mater. Sci. Eng. A224 (1997) 131.
F. U. Enikeev and A. A. Kruglov, Int. J. Mech. Sci. 37 (1995) 473.
R. A Vasin, F. U. Enikeev and M. I. Mazurski, J. Mater. Sci. 33 (1998) 1099.
F. U. Enikeev, Mater. Sci. Forum 243-245 (1997) 77.
R. A Vasin, F. U. Enikeev and M. I. Mazurski, Mater. Sci. Eng. 255 (1998) 169.
V. N. Perevezentsev, V. V. Rybin and V. N. Chuvil'deev, Acta Metall. Material. 40 (1992) 887.
A. K. Ghosh, Mater. Sci. Forum 170-172 (1994) 39.
K. A. Padmanabhan and J. Schlipf, Mater. Sci. and Techn. 12 (1996) 391.
A. I. Pshenichnyuk, V. V. Astanin and O. A. Kaibyshev, Phil. Mag. A 77 (1998) 1093
T. G. Langdon, Mater. Sci. Eng. A174 (1994) 225.
R. Z. Valiev and O. A. Kaibyshev,Acta metal. 31 (1983) 2121.
G. A. Salishchev, R. M. Galejev and R. M. Imayev, in “Superplasticity in Advanced Materials,” edited by S. Hori, M. Tokizane and N. Furushiro (The Japan Society for Research on Superplasticity, 1991) p. 163.
P. L. Blackwell and P. S. Bate, Metall. Trans. A 24A (1993) 1085.
V. S. Levchenko, V. K. Portnoy and I. I. Novikov, Unusal low grain boundary sliding in aluminium alloy with classical features of micrograin superplasticity. In: Hori, S., Tokizane, M., Furushiro, N., eds. (1991): Superplasticity in Advanced Materials, ICSAM-91, JSRS, Osaka, Japan, 1991, pp. 39-44.
P. L. Blackwell and P. S. Bate, Metall. Trans. A 27A (1996) 3747.
M. I. Mazurski and F. U. Enikeev, Physica Status Solidi 206 (1998) 519.
A. A. Sirenko, M. A. Murzinova, F. U. Enikeev, J. of Mater. Sci. Letters 14 (1995) 773.
R. M. Imayev and V. M. Imayev, Scripta Metallurgica 25 (1991) 2041.
N. G. Zaripov, O. A. Kaibyshev and O. M. Kolnogorov, Phys. Solids 35 (1993) 2114 (in Russian).
N. G. Zaripov, O. A. Kaibyshev, L. V. Petrova and O. Yu. Efimov, J. Mater. Sci. Letters 12 (1993) 502.
H. Iwasaki, K. Higashi, S. Tahimura, T. Komatubara and S. Hayami, in “Proc. Int. Conf., Superplasticity in Advanced Materials,” edited by S. Hori, M. Tokizane, N. Furushiro (Jap. Soc. Res. on Superplasticity, Osaka, Japan, 1991) p. 447.
A. K. Ghosh and C. H. Cheng, ibid. 299.
S. L. Stoner and A. K. Mukherjee, ibid. 323.
F. H. Mohamed, J. Mat. Sci. Ltrs 7 (1988) 215.
G. S. Murty and S. Banerjee, Scripta Metallurgica 31 (1994) 707.
S. W. Zehr and W. A. Backofen, Trans. Am. Soc. Metals 61 (1968) 300.
A. K. Ghosh, in “Superplastic Forming of Structural Alloys,” edited by N. E. Paton and C. H. Hamilton (Publ. TMS-AIME, Warrendale, Pensylvania, 1982) p. 85.
H. E. Cline and T. H. Alden, Trans AIME 239 (1967) 710.
J. A. Martin and W. A. Backofen, ASM Trans Quart 60 (1967) 352.
F. U. Enikeev, K. A. Padmanabhan and S. S. Bhattacharya, Mater. Sci. Technol. 15 (1999) 673.
R. A. Vasin, F. U. Enikeev and M. I. Mazurski, in “Proceed. of Int. Sem. on Microstructure, Micromechanics and Processing of Superplastic Materials (IMSP 97), Mie University, Tsu, Japan, 7-9 August 1997,” edited by T. Aizawa, K. Higashi and M. Tokuda (Mie University Press) p. 223.
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Vasin, R.A., Enikeev, F.U., Mazurski, M.I. et al. Mechanical modelling of the universal superplastic curve. Journal of Materials Science 35, 2455–2466 (2000). https://doi.org/10.1023/A:1004761501240
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DOI: https://doi.org/10.1023/A:1004761501240