Abstract
The maximum principal stresses, von Mises effective stresses and principal facet stresses at the time of creep rupture were compared in uniaxial, biaxial, and triaxial stress states for AZ31 magnesium alloy. The creep rupture of this alloy was experimentally controlled by cavitation, which was the result of a low damage tolerance, λ. Creep deformation could be correlated with the von Mises effective stress parameter. The failure-mechanism control parameter governing the stress state coincided with the experimental results of the rupture of the materials under multiaxial stress states. Finally, the theoretical prediction based on constrained cavity growth and continuous nucleation agreed with the experimental rupture data to within a factor of three.
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References
Cane, B. J. (1982). Creep damage accumulation and fracture under multiaxial stresses. Advances in Fracture Research (Fracture 81), 3, 1285–1293, Oxford, Pergamon Press.
Dyson, B. F. (1976). Constraints on diffusional cavity growth rates. Mater Sci., 10, 349–353.
Dyson, B. F. and Leckie, F. A. (1988). Physically based modeling of remanent creep life. Mater Sci Eng A, 103, 111–114.
Hayhurst, D. R. (1972). Creep rupture under multi-axial states of stress. J. Mech. Phys. Solids, 20, 381–390.
Hayhurst, D. R., Leckie, F. A. and Henderson, J. T. (1977). Design of notched bars for creep-rupture testing under tri-axial stresses. Int. J. Mech. Sci., 19, 147–159.
Huddleston, R. L. (1985). An improved multiaxial creeprupture strength criterion. J. Pressure Vessel Technol., 107, 421–429.
Isshiki, K., Horita, Z., Fujinami, T., Sano, T., Nemoto, M., Ma, Y. and Langdon, T. G. (1997). A new miniature mechanical testing procedure: Application to intermetallics. Metal. Mater. Trans. A, 28A, 2577–2582.
Jonson, N. L. and Earthman, J. C. (1994). Numerical analysis of primary creep deformation in a novel double shear specimen geometry. J. Testing Evaluation, JTEVA, 22, 111–116.
Kim, H. K., Mohamed, F. A. and Earthman, J. C. (1991). A novel specimen geometry for double shear creep experiments. J. Testing. Evaluation, 19, 93–96.
Kwon, O., Thomas, C. W. and Knowles, D. (2004). Multiaxial stress rupture behaviour and stress-state sensitivity of creep damage distribution in Durehete 1055 and 2.25Cr1Mo steel. Int. J. Pressure Vessel and Piping, 81, 535–542.
Luo, A. A. (2004). Recent magnesium alloy development for elevated temperature applications. Int. Mat. Reviews., 49, 13–30.
Nix, W. D., Earthman, J. C., Eggeler, G. and Ilschner, B. (1989). The principal facet stress as a parameter for predicting creep rupture under multiaxial stresses. Acta Metall., 37, 1067–1077.
Riedel, H. (1987). Fracture at High Temperatures. Berlin. Springer.
Spigarelli, S., Cabibbo, M., Evangelista, E., Talianker, M. and Ezersky, V. (2000). Analysis of the creep behaviour of a thixoformed AZ91 magnesium alloy. Mat. Sci. Eng. A, 289, 172–181.
Vagarali, S. S. and Langdon, T. G. (1982). Deformation mechanisms in h.c.p. metals at elevated temperatures-II. Creep behavior of a Mg-0.8% Al solid solution alloy. Acta Metall, 30, 1157–1170.
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Kim, S.H., Kim, H.K. Multiaxial stress creep rupture mechanisms of AZ31 magnesium alloy. Int.J Automot. Technol. 10, 365–372 (2009). https://doi.org/10.1007/s12239-009-0042-0
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DOI: https://doi.org/10.1007/s12239-009-0042-0