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Role of oxygen in enhanced fatigue cracking in a PM Ni-based superalloy : stress assisted grain boundary oxidation or dynamic embrittlment?
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Jiang, R., Proprentner, Daniela, Callisti, M., Shollock, Barbara A., Hu, X. T., Song, Y. D. and Reed, P. A. S. (2018) Role of oxygen in enhanced fatigue cracking in a PM Ni-based superalloy : stress assisted grain boundary oxidation or dynamic embrittlment? Corrosion Science, 139 . pp. 141-154. doi:10.1016/j.corsci.2018.05.001
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Official URL: https://doi.org/10.1016/j.corsci.2018.05.001
Abstract
The role of oxygen in enhanced fatigue cracking in an advanced Ni-based superalloy for turbine disc application has been evaluated in fatigue crack initiation and propagation stages along with static oxidation tests. It is found that the grain boundary oxide intrusion has a layered structure. The microstructure- and deformation-dependent
grain boundary oxidation dominates the fatigue crack initiation and early propagation processes. As the crack propagates, this contribution arising from oxidation damage may gradually be overtaken by dynamic embrittlement processes until the mechanical damage outstrips the oxygen-related damage, resulting in a transition from intergranular to transgranular crack propagation.
| Item Type: | Journal Article | ||||||||||||
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| Subjects: | Q Science > Q Science (General) | ||||||||||||
| Divisions: | Faculty of Science > WMG (Formerly the Warwick Manufacturing Group) | ||||||||||||
| Library of Congress Subject Headings (LCSH): | Heat resistant alloys -- Oxidation -- Testing, Heat resistant alloys -- Fatigue -- Testing, Fracture mechanics, Airplanes -- Motors | ||||||||||||
| Journal or Publication Title: | Corrosion Science | ||||||||||||
| Publisher: | Pergamon | ||||||||||||
| ISSN: | 0010-938X | ||||||||||||
| Official Date: | 15 July 2018 | ||||||||||||
| Dates: |
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| Date of first compliant deposit: | 13 July 2018 | ||||||||||||
| Volume: | 139 | ||||||||||||
| Page Range: | pp. 141-154 | ||||||||||||
| DOI: | 10.1016/j.corsci.2018.05.001 | ||||||||||||
| Status: | Peer Reviewed | ||||||||||||
| Publication Status: | Published | ||||||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||||||
| RIOXX Funder/Project Grant: |
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