Abstract
The non—stationary nucleation theory is used to explain the formation of creep pores at grain boundaries as a result of transient stress concentrations in rapid sliding processes. The numerically calculated critical stresses for persistently growing pores are the base for the analytical determination of critical stresses at other values of temperature, surface energy, and grain size. By means of the numerical results and the analytical transformation rule for the critical stresses, limits for the deformation rates are given below which superplasticity is possible without pore development.
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© 1991 Elsevier Science Publishers Ltd
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Balke, H., Bahr, HA., Pompe, W. (1991). Non-Stationary Cavity Nucleation — A Limiting Process for High-Temperature Strength and Superplasticity in Ceramics. In: Cocks, A.C.F., Ponter, A.R.S. (eds) Mechanics of Creep Brittle Materials 2. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-3688-4_16
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DOI: https://doi.org/10.1007/978-94-011-3688-4_16
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-85166-701-7
Online ISBN: 978-94-011-3688-4
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