TY - JOUR A1 - Nützmann, Kathrin A1 - Wollschläger, Nicole A1 - Rockenhäuser, Christian A1 - Kranzmann, Axel A1 - Stephan-Scherb, Christiane T1 - Identification and 3D reconstruction of Cr5S6 precipitates along grain boundaries in Fe13Cr T2 - JOM N2 - Metal sulfide grain boundary precipitates of a ferrous model alloy with 13 wt.% chromium formed at 650°C under a gas atmosphere containing 0.5% SO2 and 99.5% Ar were investigated after ageing for 3 h, 6 h, and 12 h. The precipitates formed along grain boundaries were identified as Cr5S6 using energy-dispersive x-ray spectroscopy in transmission electron microscopy and electron backscatter diffraction analysis. Serial focused ion beam slicing was conducted followed by three-dimensional reconstruction to determine the number, size, and penetration depth of the precipitates evolved at the different time steps. There was a linear increase in the number of precipitates with time, while their average size increased only for the initial aging time but became constant after 6 h. Based on these results, a model for grain boundary sulfidation of ferritic alloys is discussed. PB - Springer Science + Business Media CY - New York, NY KW - Internal Sulfidation KW - Grain Boundary Corrosion KW - FIB Tomography PY - 2018 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/45090 AN - OPUS4-45090 SN - 1047-4838 SN - 1543-1851 VL - 70 IS - 8 SP - 1478 EP - 1483 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany