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Welds of the commercial Ni‐based alloys 602 CA, 699 XA, 601 and 690 were exposed under harsh metal dusting conditions. The pit formation was compared for as‐welded, brushed, ground, glass bead blasted, steel shot peened and dry cathodic pickled surfaces. Surface treatments were applied by industrial partners. When (stainless) steels were involved in the surface treatment, Fe contaminations acted as...
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Electron backscatter diffraction (EBSD) images of steel shot peened Ni‐base alloy 699 XA after 480 h exposure in a carbon‐rich gas at 620 °C and 19 bar. From left to right: secondary electron image, color coded using an inverse pole figure, and color coded by crystal structure. During high temperature exposure, α‐Cr (BCC) precipitates formed in the highly deformed nearsurface zone. Images by...