|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals, and Materials
||Effect of Grain Boundary Plane on the Sensitization of Austenitic Stainless Steel
||Matthew Hartshorne, Christopher M Barr, Mitra L Taheri
|On-Site Speaker (Planned)
Austenitic stainless steels are widely used across the petrochemical, nuclear and renewable energy industries. However, exposure to elevated temperatures can sensitize these steels, limiting their service lives. Sensitization is caused by the precipitation of secondary phases such as chromium carbides at grain boundaries, however grain boundary engineered microstructures have been shown to mitigate this. Grain boundary engineered stainless steels rely on high fractions of low energy grain boundaries, such as ∑3n, however not all of these grain boundaries resist sensitization to the same degree. Experiments will be presented utilizing EBSD stereology and serial sectioning in conjunction with bulk corrosion testing on multiple grain boundary engineered microstructures. TEM and APT will be utilized to correlate the corrosion resistance of specific grain boundaries to both their misorientation and grain boundary plane, illustrating the importance of coherent twin boundaries to corrosion resistance in austenitic stainless steels.
||Planned: Stand-alone book in which only your symposium’s papers would appear (indicate title in comments section below)