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Microstructure and solidification sequence of the interdendritic region in a third generation single-crystal nickel-base superalloy
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Pang, H. T., Dong, H. B., Beanland, R., Stone, H. J., Rae, C. M. F., Midgley, P. A., Brewster, G. and D’Souza, N. (2009) Microstructure and solidification sequence of the interdendritic region in a third generation single-crystal nickel-base superalloy. Metallurgical and Materials Transactions A, Volume 40 (Number 7). pp. 1660-1669. doi:10.1007/s11661-009-9855-8 ISSN 1073-5623.
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Official URL: http://dx.doi.org/10.1007/s11661-009-9855-8
Abstract
An analysis of the microstructure of the interdendritic regions in an as-cast third generation single-crystal nickel-base superalloy CMSX-10K has been carried out using automated serial sectioning with sequential focused ion beam (FIB) milling and image capture of the secondary electron image in a combined FIB–scanning electron microscope (SEM). Two interdendritic morphologies with vastly different γ/γ′ spacing were identified; these are (1) fine γ/γ′ morphology and (2) coarse cellular γ′ separated by narrow γ channels. The FIB results indicate that following primary solidification (L → γ), solidification of the interdendritic region commences in areas that show the fine γ/γ′ morphology, (1) on the γ dendrite lobe. This is followed by a gradual transition to growth of the coarse cellular γ/γ′ channel structure, (2) which occur up to the termination of the solidification process.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | Metallurgical and Materials Transactions A | ||||
Publisher: | Springer | ||||
ISSN: | 1073-5623 | ||||
Official Date: | 2009 | ||||
Dates: |
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Volume: | Volume 40 | ||||
Number: | Number 7 | ||||
Page Range: | pp. 1660-1669 | ||||
DOI: | 10.1007/s11661-009-9855-8 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Funder: | Engineering and Physical Sciences Research Council (EPSRC), Royal Society, Rolls-Royce plc. | ||||
Grant number: | EP/E012477 (EPSRC) |
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