Spallation resistance of oxide scales on Alloy 617 enhanced by boron addition

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We report on the effects of B additions to Alloy 617 on its high-temperature oxidation behavior and on the spallation of oxide scales. Alloy 617 and a B-added derivative (Alloy 617B) were oxidized at 1050 °C in air and comparatively studied. Cr2O3 scales formed on both alloys with a spinel phase and a Ti-rich oxide on top. While both alloys showed similar scale growth kinetics, Alloy 617B showed substantially enhanced resistance to oxide scale spallation. B segregation at Cr2O3 grain boundaries, detected by atom probe tomography, was found to be the reason for the enhanced spallation resistance of Alloy 617B.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2018-08
Language
English
Article Type
Article
Citation

CORROSION SCIENCE, v.140, pp.196 - 204

ISSN
0010-938X
DOI
10.1016/j.corsci.2018.06.002
URI
http://hdl.handle.net/10203/244963
Appears in Collection
MS-Journal Papers(저널논문)
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