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In-situ neutron diffraction during stress relaxation of a single crystal nickel-base superalloy
journal contributionposted 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.
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.
CitationScripta Materialia Volume 131, 1 April 2017, Pages 103-107
- VoR (Version of Record)