Abstract 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… Click to show full abstract
Abstract 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.
Journal Title: Scripta Materialia
Year Published: 2017
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