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Title: High-temperature microstructural evolution and quantification for alloys IN740 and IN740H: comparative study
Authors: Di Martino, Fabio
Faulkner, Roy G.
Hogg, Simon C.
Keywords: IN740
Ni-base alloys
Ultra-supercritical power plant
Microstructural evolution
Issue Date: 2016
Publisher: Taylor & Francis © Institute of Materials, Minerals and Mining
Citation: DI MARTINO, F., FAULKNER, R.G. and HOGG, S.C., 2016. High-temperature microstructural evolution and quantification for alloys IN740 and IN740H: comparative study. Materials Science and Technology, 33 (1), pp. 40-48.
Abstract: In ultra-supercritical power plants, Ni-base alloys are candidate materials for long-term, high-temperature applications, operating at temperatures and pressures as high as 750°C and 35 MPa. Alloy IN740 and its modification, alloy IN740H, are considered for such applications. Their microstructural evolution, at 750°C for times ranging between 3000 and 5000 hours, has been investigated by means of scanning electron microscopy, electron back-scattered diffraction, energy dispersive X-ray analysis and phase quantification. All phases were identified and quantified allowing comparison between the two microstructures, their evolution and stability. Particular attention was paid to γ′, η and G phases. The results are used within a broader investigation aimed at improving and further developing a predictive creep model based on continuous damage mechanics.
Description: This is an Accepted Manuscript of an article published by Taylor & Francis in Materials Science and Technology on 12 April 2016, available online: http://www.tandfonline.com/10.1080/02670836.2016.1159002.
Sponsor: The investigation is part of the collaborative project ENER/FP7EN/249809/MACPLUS, funded by the EU within the FP7 framework.
Version: Accepted for publication
DOI: 10.1080/02670836.2016.1159002
URI: https://dspace.lboro.ac.uk/2134/26489
Publisher Link: https://doi.org/10.1080/02670836.2016.1159002
ISSN: 0267-0836
Appears in Collections:Published Articles (Materials)

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