Abstract
Abstract Crystallography, morphology, and kinetics of stress corrosion cracking (SCC) in austenitic stainless steels exposed to boiling, aqueous 45% magnesium chloride solution were studied on single crystal specimens of a Type 316 stainless steel. Notched specimens of selected orientations were stressed in bending, using a self relieving loading system. The variations of load during crack propagation were recorded and analyzed to obtain a relation between the crack propagation rate and other parameters. A single surface analysis of crack traces on the specimen sides and a two surface trace analysis on sections through flat regions of fracture surfaces were used in the determination of the crystallographic orientation of the cracking plane. Fracture surface topography and corrosion attack on slip steps were examined in a scanning electron microscope. The results of the crystal lographic analysis show that the stress corrosion cracks propagated on (210) oriented crystal planes. After an initial period, the...
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