Synchrotron X-ray fluorescence imaging study on chloride-induced stress corrosion cracking behavior of austenitic stainless steel welds via selective corrosion of δ-ferrite
Source abstract
Abstract
Chloride-induced stress corrosion cracking (CISCC) is a degradation of austenitic stainless steels by Cl-containing media, residual stress, and materials susceptibility. In this study, synchrotron X-ray fluorescence imaging and electron microscopy were utilized to investigate the CISCC mechanism in austenitic stainless steel welds 304 L-ER308L and 316 L-ER316L. Specimens were exposed to 60 °C and 30% relative humidity conditions for 3 months and their microstructure and chemistry were analyzed. Since δ-ferrite is composed of ferrite formers especially Cr and acts as a sink for impurities, selective corrosion of δ-ferrite results in pitting corrosion and CISCC propagation.
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Research context
OpenAlex topics: Hydrogen embrittlement and corrosion behaviors in metals · Corrosion Behavior and Inhibition · Non-Destructive Testing Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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