About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
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| Symposium
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Cutting-Edge Characterization and Electrochemical Techniques for Unraveling Corrosion Phenomena
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| Presentation Title |
Advanced Mechanical Characterization of Chloride-Induced Stress Corrosion Cracking in Stainless Steel |
| Author(s) |
Janelle P. Wharry, Ronit Roy, Lucille V Dentice, Nathan T Gehmlich, Thang Duc Nguyen, Haozheng J Qu, Maria A Okuniewski |
| On-Site Speaker (Planned) |
Janelle P. Wharry |
| Abstract Scope |
This talk will demonstrate advanced electron microscopy techniques to characterize the elasto-plastic mechanisms of chloride-induced stress corrosion cracking (CISCC) in 304L stainless steel. CISCC, and SCC more generally, has long been characterized using scanning electron microscopy (SEM) to observe features including reaction product layers, pit-to-crack profiles, and crack paths. While these techniques provide significant insight into the nature and morphology of SCC, the roles of elasticity and plasticity (i.e., dislocations) on SCC could only be discerned through time-consuming and localized transmission electron microscopy (TEM). But more recently, high-resolution electron backscatter diffraction (HR-EBSD) enables new insights into the interplay between pitting, cracking, and dislocations. HR-EBSD rapidly maps stress over multiple grains, providing a microscale understanding of dislocation activity previously attainable only through numerous TEM lamellae. Here we apply HR-EBSD to CISCC in 304L stainless steel welds. The attained stress distributions shed new light on the mechanical drivers of CISCC. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Environmental Effects, Nuclear Materials |