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- W2037302512 abstract "The AlAl2O3 alloy produced by powder metallurgy route has been tested under compression creep in the temperature range 573–723 K to evaluate the steady-state creep mechanisms. The steady state creep data covering almost five orders of magnitude in creep rate shows to distinct regimes of creep deformation at all the temperatures. In the high stress regime (region-II), the creep data shows high and variable apparent stress exponents, 25–30 and high apparent activation energy, 372 kJ/mol. However, in the low stress regime (region-I), the lower values of stress exponents, 7–11 and activation energy, 85 kJ/mol are observed. The TEM micrographs of the uncrept and crept specimens exhibit subgrains with Al2O3 particles lying on the subgrain boundaries. The high stress regime data was examined in terms of pipe-diffusion controlled constant substructure creep model and thermally activated detachment controlled dislocation creep model. The detachment controlled dislocation model can describe the present data more successfully. The low stress regime data was analyzed according to the thermally activated detachment controlled diffusional creep model and pipe-diffusion controlled stress dependent substructure model. Thermally activated detachment controlled diffusional creep mechanism appears to be more appropriate for the present data." @default.
- W2037302512 created "2016-06-24" @default.
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- W2037302512 date "1997-03-01" @default.
- W2037302512 modified "2023-10-07" @default.
- W2037302512 title "Steady state creep behaviour of an AlAl2O3 alloy" @default.
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- W2037302512 doi "https://doi.org/10.1016/s1359-6454(96)00225-x" @default.
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