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Microstructural degradation of polycrystalline superalloys from oxidized carbides and implications on crack initiation

Abstract:

Surface connected carbides in a polycrystalline superalloy oxidized at 750 °C in air were studied as potential crack initiation sites. Lattice rotations measured in the γ/γ′ grains using high-resolution electron backscatter diffraction enabled investigation of the plastic deformation induced solely by the oxidation of carbides. Dislocations were found to enhance γ′ precipitate dissolution kinetics, resulting in soft recrystallized regions in the vicinity of the oxidized carbide with substanti...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1016/j.scriptamat.2017.12.028

Authors


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Division:
MPLS Division
Department:
Materials
Oxford college:
St Cross College
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Materials
Oxford college:
St Cross College
Role:
Author
ORCID:
0000-0002-8801-4102
More by this author
Division:
MPLS Division
Department:
Materials
Oxford college:
St Cross College
Role:
Author
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Publisher:
Elsevier Publisher's website
Journal:
Scripta Materialia Journal website
Volume:
147
Pages:
59-63
Publication date:
2018-01-08
Acceptance date:
2017-12-26
DOI:
ISSN:
1359-6462
Source identifiers:
820756
Keywords:
Pubs id:
pubs:820756
UUID:
uuid:0520ee31-957e-45cd-918a-9445a47c0512
Local pid:
pubs:820756
Deposit date:
2018-02-01

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