Abstract
High-temperature (1160 to 1450‡ C) deformation of dense polycrystalline (10 to 90 Μm) Al2O3 and MgO doped with Fe (up to 2.65 cation %) was studied by stress relaxation, dead-load creep and creep recovery. In some cases, all three deformation tests were conducted on a single specimen. A comparison of strain rate-stress data calculated from both stress relaxation and dead-load creep experiments revealed discrepancies in both the magnitude of the strain rates and the dependence between the strain rate and stress. These differences were attributed to the existence of anelastic deformation effects. The correction of stress relaxation data in the low stress regime for linear anelasticity led to strain rate-stress data in reasonably close agreement with results obtained from dead-load creep tests conducted in the viscous creep regime. Creep recovery experiments indicated that anelastic deformation in these ceramic materials was relatively insensitive to changes in temperature and grain size over the range of variables studied.
Similar content being viewed by others
References
D. K. Shetty and R. S. Gordon, J. Mater. Sci. 14 (1979) 2163.
A. M. Freudenthal, ASTM Proc. 60 (1960) 986.
E. W. Hart, Nucl. Eng. Design 46 (1978) 179.
Idem, in “Stress Relaxation Testing”, ASTM STP 676, edited by A. Fox, (American Society for the Testing of Metals, Philadelphia, 1979) p. 5.
J. T. A. Roberts, Acta Metal. 22 (1974) 873.
R. T. Tremper, R. A. Giddings, J. D. Hodge, and R. S. Gordon, J. Amer. Ceram. Soc. 57 (1974) 421.
P. A. Lessing and R. S. Gordon, J. Mater. Sci. 12 (1977) 2291.
Y. Ikuma, Ph. D. Thesis, University of Utah (1980).
J. D. Hodge, P. A. Lessing and R. S. Gordon, J. Mater. Sci. 12 (1977) 1598.
P. E. Bohaboy, R. R. Asamoto and A. E. Conti, GEAP-10054 (1969).
E. W. Hart and H. D. Solomon, Acta Metal. 21 (1973) 295.
W. H. Gitzen, “Alumina as a Ceramic Material” (American Ceramic Society, Columbus, Ohio, 1970) p. 53.
D. H. Chung and W. G. Lawrence, J. Amer. Ceram. Soc. 47 (1964) 448.
G. J. Lloyd and R. J. McElroy, Acta Metal. 22 (1974) 339.
W. R. Cannon and O. D. Sherby, J. Amer. Ceram. Soc. 56 (1973) 157.
S. I. Warshaw and F. H. Norton, ibid. 45 (1962) 479.
J. H. Hensler and G. V. Cullen, ibid. 51 (1968) 557.
G. R. Terwillinger, H. K. Bowen and R. S. Gordon, ibid. 53 (1970) 241.
T. G. Langdon and J. A. Pask, Acta Metal. 18 (1970) 505.
R. S. Gordon and G. R. Terwillinger, J. Amer. Ceram. Soc. 55 (1972) 450.
Y. Oishi and W. D. Kingery, J. Chem. Phys. 32 (1960) 480.
A. E. Paladino and W. D. Kingery, ibid. 37 (1962) 957.
Y. Oishi and W. D. Kingery, ibid. 33 (1960) 905.
R. Linder and G. D. Parfitt, ibid. 26 (1957) 182.
B. C. Harding and D. M. Price, Phil. Mag. 26 (1972) 253.
B. J. Wuensch and T. Vasilos, J. Chem. Phys. 36 (1962) 2917.
P. D. Southgate, J. Phys. Chem. Sol. 27 (1966) 1263.
J. E. Turnbaugh and F. H. Norton, J. Amer. Ceram Soc. 51 (1968) 344.
C. Zener, “Elasticity and Anelasticity of Metals” (University of Chicago Press, Chicago, 1948) pp. 147–159.
W. N. Findley, J. S. Lai and K. Onaran, “Creep and Relaxation of Nonlinear Viscoelastic Materials”, (North-Holland Publishing, Amsterdam, New York and Oxford, 1976).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Ikuma, Y., Gordon, R.S. Effects of anelastic deformation on high-temperature stress relaxation of polycrystalline MgO and Al2O3 . J Mater Sci 17, 1066–1078 (1982). https://doi.org/10.1007/BF00543526
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00543526