The effect of phase angle on crack growth mechanisms under thermo-mechanical fatigue loading

J. Jones; M. Whittaker; R. Lancaster; C. Hyde; J. Rouse; B. Engel; S. Pattison; S. Stekovic; C. Jackson; H.y. Li

doi:10.1016/j.ijfatigue.2020.105539

The effect of phase angle on crack growth mechanisms under thermo-mechanical fatigue loading

J. Jones, M. Whittaker, R. Lancaster, C. Hyde, J. Rouse, B. Engel, S. Pattison, S. Stekovic, C. Jackson, H.y. Li

Metallurgy and Materials

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Abstract

The current paper describes TMF crack growth behaviour in an advanced nickel-based superalloy. Changes in behaviour are examined which occur as a function of the phase angle between applied stress and temperature. The fractography of the failed specimens reveals changes from transgranular to intergranular growth between high and low phase angle tests as a result of the onset of high temperature damage mechanisms. More targeted testing has also been undertaken to isolate the contributions of these mechanisms, with specific transitions in behaviour becoming clear in 90° diamond cycles, where dynamic crack growth and oxidation strongly interact.

Original language	English
Article number	105539
Pages (from-to)	1-12
Number of pages	12
Journal	International Journal of Fatigue
Volume	135
Early online date	16 Feb 2020
DOIs	https://doi.org/10.1016/j.ijfatigue.2020.105539
Publication status	Published - Jun 2020

Keywords

creep
oxidation
phase angle
thermo-mechanical fatigue

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Jones_et_al_The_effect_of_phase_angle_on_crack_growth_mechanisms_International_Journal_of_Fatigue_2020Accepted author manuscript, 2.53 MBLicence: Creative Commons: Attribution-NonCommercial-NoDerivs (CC BY-NC-ND)

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title = "The effect of phase angle on crack growth mechanisms under thermo-mechanical fatigue loading",

abstract = "The current paper describes TMF crack growth behaviour in an advanced nickel-based superalloy. Changes in behaviour are examined which occur as a function of the phase angle between applied stress and temperature. The fractography of the failed specimens reveals changes from transgranular to intergranular growth between high and low phase angle tests as a result of the onset of high temperature damage mechanisms. More targeted testing has also been undertaken to isolate the contributions of these mechanisms, with specific transitions in behaviour becoming clear in 90° diamond cycles, where dynamic crack growth and oxidation strongly interact.",

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AU - Whittaker, M.

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AU - Hyde, C.

AU - Rouse, J.

AU - Engel, B.

AU - Pattison, S.

AU - Stekovic, S.

AU - Jackson, C.

AU - Li, H.y.

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AB - The current paper describes TMF crack growth behaviour in an advanced nickel-based superalloy. Changes in behaviour are examined which occur as a function of the phase angle between applied stress and temperature. The fractography of the failed specimens reveals changes from transgranular to intergranular growth between high and low phase angle tests as a result of the onset of high temperature damage mechanisms. More targeted testing has also been undertaken to isolate the contributions of these mechanisms, with specific transitions in behaviour becoming clear in 90° diamond cycles, where dynamic crack growth and oxidation strongly interact.

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KW - oxidation

KW - phase angle

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JO - International Journal of Fatigue

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The effect of phase angle on crack growth mechanisms under thermo-mechanical fatigue loading

Abstract

Keywords

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