In-situ neutron diffraction during stress relaxation of a single crystal nickel-base superalloy. (1st April 2017)

• Record Type: Journal Article
• Authors: Collins, David M.; D'Souza, Neil; Panwisawas, Chinnapat
• Is Part Of: Scripta materialia. Number 131(2017)
• Page Start: 103
• Page End: 107
• Publication Date: 2017-04-01
• Subjects: Superalloys -- Neutron diffraction -- Single crystal -- Stress relaxation -- Lattice strain; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2017.01.002
• Languages: English
• ISSNs: 1359-6462

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. Graphical Abstract: