Reduced partitioning of plastic strain for strong and yet ductile precipitate-strengthened alloys.
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Authors
Jones, RD
Lim, H
Battaile, CC
Clegg, William
Publication Date
2018-06-06Journal Title
Scientific reports
ISSN
2045-2322
Publisher
Nature Publishing Group
Volume
8
Issue
1
Pages
8698
Language
eng
Type
Article
Physical Medium
Electronic
Metadata
Show full item recordCitation
Jones, R., Di Gioacchino, F., Lim, H., Edwards, T., Schwalbe, C., Battaile, C., & Clegg, W. (2018). Reduced partitioning of plastic strain for strong and yet ductile precipitate-strengthened alloys.. Scientific reports, 8 (1), 8698. https://doi.org/10.1038/s41598-018-26917-0
Abstract
When a material that contains precipitates is deformed, the precipitates and the matrix may strain plastically by different amounts causing stresses to build up at the precipitate-matrix interfaces. If premature failure is to be avoided, it is therefore essential to reduce the difference in the plastic strain between the two phases. Here, we use nanoscale digital image correlation to measure a new variable that quantifies this plastic strain difference. We then show how its value can be used to estimate the associated interfacial stresses, which are found to be approximately three times greater in an Fe-Ni2AlTi steel than in the more ductile Ni-based superalloy CMSX-4®. It is then demonstrated that decreasing these stresses significantly improves the ability of the Fe-Ni2AlTi microstructure to deform under tensile loads without loss in strength.
Sponsorship
Rolls-Royce plc
Funder references
EPSRC (EP/M005607/1)
EPSRC (1505208)
Identifiers
External DOI: https://doi.org/10.1038/s41598-018-26917-0
This record's URL: https://www.repository.cam.ac.uk/handle/1810/280756