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

David Collins; Neil D'Souza; Chinnapat Panwisawas

doi:10.1016/j.scriptamat.2017.01.002

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

David Collins, Neil D'Souza, Chinnapat Panwisawas

Metallurgy and Materials

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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 g matrix and g' precipitate phases from data obtained sufficiently rapidly to help elucidate the microscopic effect of macroscopic stress relaxation. The independent response of g and g' is revealed, showing the temperature sensitivity of lattice strain relaxation. The g/g' response is discussed in the context of thermo-mechanical conditions that may affect the propensity for recrystallisation.

Original language	English
Pages (from-to)	103-107
Journal	Scripta Materialia
Volume	131
Early online date	26 Jan 2017
DOIs	https://doi.org/10.1016/j.scriptamat.2017.01.002
Publication status	Published - 1 Apr 2017

Keywords

Neutron diffraction
Stress relaxation
Superalloys

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Collins_et_al_In-situ_neutron_diffraction_Scripta_Materialia_2017
Checked for eligibility: 28/03/2017
Final published version, 1.68 MBLicence: Creative Commons: Attribution (CC BY)

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title = "In-situ neutron diffraction during stress relaxation of a single crystal nickel-base superalloy",

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 g matrix and g' precipitate phases from data obtained sufficiently rapidly to help elucidate the microscopic effect of macroscopic stress relaxation. The independent response of g and g' is revealed, showing the temperature sensitivity of lattice strain relaxation. The g/g' response is discussed in the context of thermo-mechanical conditions that may affect the propensity for recrystallisation.",

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author = "David Collins and Neil D'Souza and Chinnapat Panwisawas",

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T1 - In-situ neutron diffraction during stress relaxation of a single crystal nickel-base superalloy

AU - Collins, David

AU - D'Souza, Neil

AU - Panwisawas, Chinnapat

PY - 2017/4/1

Y1 - 2017/4/1

N2 - 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 g matrix and g' precipitate phases from data obtained sufficiently rapidly to help elucidate the microscopic effect of macroscopic stress relaxation. The independent response of g and g' is revealed, showing the temperature sensitivity of lattice strain relaxation. The g/g' response is discussed in the context of thermo-mechanical conditions that may affect the propensity for recrystallisation.

AB - 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 g matrix and g' precipitate phases from data obtained sufficiently rapidly to help elucidate the microscopic effect of macroscopic stress relaxation. The independent response of g and g' is revealed, showing the temperature sensitivity of lattice strain relaxation. The g/g' response is discussed in the context of thermo-mechanical conditions that may affect the propensity for recrystallisation.

KW - Neutron diffraction

KW - Stress relaxation

KW - Superalloys

U2 - 10.1016/j.scriptamat.2017.01.002

DO - 10.1016/j.scriptamat.2017.01.002

M3 - Article

SN - 1359-6462

VL - 131

SP - 103

EP - 107

JO - Scripta Materialia

JF - Scripta Materialia

ER -

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

Abstract

Keywords

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