Abstract
Dislocation creep rates at 625°C have been examined in Type 316 stainless steel in both the solution treated condition and after pre-straining to the secondary creep state at several initial stresses. The application of particle-induced internal stress ideas does not provide a completely satisfactory interpretation of the creep behaviour and a more realistic approach, based on a detailed examination of the dislocation link length distributions and the calculation of the mobile dislocation fraction, has been used. The intragranular particles present in the steel are shown to be important in controlling the dislocation link length distributions and it is this effect, rather than a frictional stress effect, that determines the creep rate.
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