IN617_DiMartino_Hogg_LBORO.pdf (4.03 MB)

Characterisation of microstructure and creep properties of alloy 617 for high-temperature applications

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journal contribution
posted on 15.09.2017, 10:10 by Fabio Di Martino, Roy G. Faulkner, Simon Hogg, S. Vujic, O. Tassa
Current energy drivers are pushing research in power generation materials towards improved efficiency and improved environmental impact. In the context of new generation ultra-supercritical (USC) power plant, this is represented by increased efficiency, service temperature reaching 750. °C, pressures in the range of 35-37.5. MPa and associated carbon capture technology. Ni base alloys are primary candidate materials for long term high temperature applications such as boilers. The transition from their current applications, which have required lower exposure times and milder corrosive environments, requires the investigation of their microstructural evolution as a function of thermo-mechanical treatment and simulated service conditions, coupled with modelling activities that are able to forecast such microstructural changes. The lack of widespread microstructural data in this context for most nickel base alloys makes this type of investigation necessary and novel. Alloy INCONEL 617 is one of the Ni-base candidate materials. The microstructures of four specimens of this material crept at temperatures in the 650-750. °C range for up to 20,000. h have been characterised and quantified. Grain structure, precipitate type and location, precipitate volume fraction, size and inter-particle spacing have been determined. The data obtained are used both as input for and validation of a microstructurally-based CDM model for forecasting creep properties.

Funding

The investigation is part of the collaborative project MACPLUS, funded by the EU within the FP7 framework, ENER/FP7EN/249809/MACPLUS.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Materials

Published in

Materials Science and Engineering A

Volume

619

Pages

77 - 86

Citation

DI MARTINO, F. ... et al, 2014. Characterisation of microstructure and creep properties of alloy 617 for high-temperature applications. Materials Science and Engineering: A, 619, pp. 77-86.

Publisher

© Elsevier

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

05/09/2014

Publication date

2014-09-18

Copyright date

2014

Notes

This paper was accepted for publication in the journal Materials Science and Engineering: A and the definitive published version is available at https://doi.org/10.1016/j.msea.2014.09.046

ISSN

0921-5093

Language

en