TY - JOUR A1 - Vöse, Markus A1 - Fedelich, Bernard A1 - Owen, J. T1 - A simplified model for creep induced grain boundary cavitation validated by multiple cavity growth simulations N2 - Simulations of cavitation processes on a grain boundary under creep conditions have been carried out, taking into account nucleation, growth, coalescence and sintering of multiple cavities. Cavity growth rates have been calculated through a resolution procedure based on the use of holomorphic complex functions. Three dimensionless parameters have been identified that are responsible for the cavitation development. Parameter studies have been carried out in order to characterise the mechanisms that are responsible for the cavitation development. These studies have been used to develop a physically motivated, simplified model in order to describe the cavitation development of the simulations in terms of global state variables. The simplified model is able to reproduce the cavitation development for all considered combinations of the dimensionless parameters and allows the description of the thickening behaviour of a cavitating grain boundary. KW - Creep damage KW - Grain boundary diffusion KW - Cavitation KW - Simulation PY - 2012 U6 - https://doi.org/10.1016/j.commatsci.2012.01.033 SN - 0927-0256 VL - 58 SP - 201 EP - 213 PB - Elsevier CY - Amsterdam AN - OPUS4-25630 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Zahn, Edward von A1 - Owen, A. J. T1 - The Activities of the International Group of Experts of the Explosions Risks of Unstable Substances (IGUS) PY - 1974 SP - 235 EP - 237 PB - Elsevier CY - Den Haag AN - OPUS4-8033 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Fedelich, Bernard A1 - Owen, J. ED - Bell, R. ED - Merati, A. ED - M. Nganbe, ED - Tyson, B. ED - Wang, X. T1 - Creep damage by multiple cavity growth controlled by grain boundary diffusion T2 - ICF12 - 12th International Conference on Fracture CY - Ottawa, Canada DA - 2009-07-12 KW - Grain boundary cavitation KW - Hochtemperatur KW - Kriechen KW - Schädigung KW - Korngrenzenporosität KW - High temperature KW - Creep KW - Damage PY - 2009 SP - 1 EP - 10 AN - OPUS4-20623 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -