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51316-7599-Influence of localized corrosion on the fatigue behaviour of an austenitic stainless steel

Product Number: 51316-7599-SG
ISBN: 7599 2016 CP
Author: Anna Visser
Publication Date: 2016
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Materials tested under cyclic loading in aggressive electrolytes suffer different kinds of localized damage which compete or superimpose mechanical fatigue. Fatal damage is influenced by both mechanical and (electro-)chemical parameters.In the present study an austenitic stainless steel has been tested in corrosive electrolytes ranging from mild to aggressive conditions by changes in temperature pH-value and chloride content. To study the effect on S/N curves and especially on the fatigue endurance limit the type of damage was determined by investigating fracture surfaces using scanning electron microscope (SEM). In addition electrochemical properties of the steel in the applied testing solutions were ascertained by cyclic polarization. Furthermore scratch tests were used to characterize the materials repassivation kinetics.The results show the effect of different types of localized corrosion on the material performance under cyclic loading. This work aims to contribute to an improved understanding of the relation between environmental conditions and corrosion fatigue behaviour of austenitic stainless steel.
Materials tested under cyclic loading in aggressive electrolytes suffer different kinds of localized damage which compete or superimpose mechanical fatigue. Fatal damage is influenced by both mechanical and (electro-)chemical parameters.In the present study an austenitic stainless steel has been tested in corrosive electrolytes ranging from mild to aggressive conditions by changes in temperature pH-value and chloride content. To study the effect on S/N curves and especially on the fatigue endurance limit the type of damage was determined by investigating fracture surfaces using scanning electron microscope (SEM). In addition electrochemical properties of the steel in the applied testing solutions were ascertained by cyclic polarization. Furthermore scratch tests were used to characterize the materials repassivation kinetics.The results show the effect of different types of localized corrosion on the material performance under cyclic loading. This work aims to contribute to an improved understanding of the relation between environmental conditions and corrosion fatigue behaviour of austenitic stainless steel.
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