Abstract
AbstractThis chapter analyzes deformation in austenitic stainless steels, which are widely used and industrially important metals. Yield stress as a function of temperature and strain rate in annealed AISI 304 and AISI 316 alloys is first examined. It is shown that a two-parameter model is required to best describe the behavior. Availability of data showing the effect of grain size on strength enables introduction of a grain size-dependent athermal stress. For the two-parameter kinetic model, both of the mechanical threshold stresses demonstrate a dependence on alloy chemistry, but one, in particular, shows a strong dependence on nitrogen content. Analysis of deformation in alloys exposed to irradiation damage sheds insight on the nature of this damage mechanisms. Dynamic strain aging is observed at elevated temperature. Similarities to the “signatures” of DSA observed in BCC and HCP metals are described.KeywordsMechanical threshold stressMTS modelYield stressGrain size dependenceAustenitic stainless steelsAISI 304AISI 304LAISI 316AISI 316LDeformation kineticsStructure evolutionDynamic strain agingIrradiation damage
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