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In-situ neutron diffraction during stress relaxation of a single crystal nickel-base superalloy

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journal contribution
posted on 2020-05-12, 12:14 authored by DM Collins, N D'Souza, C Panwisawas
The stress relaxation behaviour of a single crystal nickel-base superalloy has been quantified using time-of-flight neutron diffraction analysis for a range of temperatures relevant to casting. A new iterative analysis methodology is described to isolate the lattice strain behaviour of the γ matrix and γ' precipitate phases from data obtained sufficiently rapidly to help elucidate the microscopic effect of macroscopic stress relaxation. The independent response of γ and γ' is revealed, showing the temperature sensitivity of lattice strain relaxation. The γ/γ' response is discussed in the context of thermo-mechanical conditions that may affect the propensity for recrystallisation.

Funding

The authors acknowledge the allocation of beam time (RB10505) at ISIS, Rutherford Appleton Laboratory, funded by the Science and Technology Facilities Council. With thanks to Dr Joe Kelleher for experimental support.

History

Citation

Scripta Materialia Volume 131, 1 April 2017, Pages 103-107

Version

  • VoR (Version of Record)

Published in

Scripta Materialia

Volume

131

Pagination

103 - 107

Publisher

Elsevier BV

issn

1359-6462

Acceptance date

2017-01-03

Copyright date

2017

Available date

2017-01-26

Publisher version

https://www.sciencedirect.com/science/article/pii/S1359646217300027

Notes

Datasets from this manuscript will be made available via the Oxford University Research Archive (ora.ox.ac.uk).

Language

en

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