Effect of prior oxidation on high cycle fatigue performance of RR1000 and role of oxidation in fatigue crack initiation

S. Cruchley; Mary Taylor; Hangyue Li; H. E. Evans; P. Bowen; D. J. Child; M. C. Hardy

doi:10.1179/0960340914Z.00000000064

Effect of prior oxidation on high cycle fatigue performance of RR1000 and role of oxidation in fatigue crack initiation

S. Cruchley, Mary Taylor, Hangyue Li, H. E. Evans, P. Bowen, D. J. Child, M. C. Hardy

Metallurgy and Materials

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Abstract

The effect of prior oxidation on the room temperature fatigue life of coarse grained Ni based superalloy, RR1000 has been performed at an R ratio of 0·1 with two pre-oxidation times: 100 and 2000 h at 700°C. These pre-exposures produce extensive oxidation damage. The room temperature high cycle fatigue life of the pre-oxidised specimens has been compared to as received specimens. At a maximum applied stress of 800 MPa a significant fatigue life deficit is observed in the pre-oxidised testpieces. This is accompanied with the observations of significant cracking of the external chromia scale and the intergranular internal oxides within the area of maximum stress. Preferential cracking of oxides may lead to early crack initiation and consequently a reduction in total fatigue life.

Original language	English
Pages (from-to)	68-73
Number of pages	6
Journal	Materials at High Temperatures
Volume	32
Issue number	1-2
Early online date	19 Jan 2015
DOIs	https://doi.org/10.1179/0960340914Z.00000000064
Publication status	E-pub ahead of print - 19 Jan 2015

Keywords

oxidation
fatigue crack initiation
high cycle fatigue

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10.1179/0960340914Z.00000000064Licence: None: All rights reserved

Cruchley_et_al_Effect_of_prior_oxidation_Materials_at_High_Temperature_2015
This is an Accepted Manuscript of an article published by Taylor & Francis in Materials at High Temperatures on 19/01/2015, available online: http://www.tandfonline.com/10.1179/0960340914Z.00000000064
Accepted author manuscript, 1.16 MBLicence: Other (please specify with Rights Statement)

http://www.tandfonline.com/doi/full/10.1179/0960340914Z.00000000064Licence: None: All rights reserved

Structural Metallic Systems For Advanced Gas Turbine Applications
Bowen, P., Chiu, Y. & Reed, R.
Engineering & Physical Science Research Council
1/10/09 → 30/09/14
Project: Research Councils

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title = "Effect of prior oxidation on high cycle fatigue performance of RR1000 and role of oxidation in fatigue crack initiation",

abstract = "The effect of prior oxidation on the room temperature fatigue life of coarse grained Ni based superalloy, RR1000 has been performed at an R ratio of 0·1 with two pre-oxidation times: 100 and 2000 h at 700°C. These pre-exposures produce extensive oxidation damage. The room temperature high cycle fatigue life of the pre-oxidised specimens has been compared to as received specimens. At a maximum applied stress of 800 MPa a significant fatigue life deficit is observed in the pre-oxidised testpieces. This is accompanied with the observations of significant cracking of the external chromia scale and the intergranular internal oxides within the area of maximum stress. Preferential cracking of oxides may lead to early crack initiation and consequently a reduction in total fatigue life.",

keywords = "oxidation , fatigue crack initiation , high cycle fatigue",

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T1 - Effect of prior oxidation on high cycle fatigue performance of RR1000 and role of oxidation in fatigue crack initiation

AU - Cruchley, S.

AU - Taylor, Mary

AU - Li, Hangyue

AU - Evans, H. E.

AU - Bowen, P.

AU - Child, D. J.

AU - Hardy, M. C.

PY - 2015/1/19

Y1 - 2015/1/19

N2 - The effect of prior oxidation on the room temperature fatigue life of coarse grained Ni based superalloy, RR1000 has been performed at an R ratio of 0·1 with two pre-oxidation times: 100 and 2000 h at 700°C. These pre-exposures produce extensive oxidation damage. The room temperature high cycle fatigue life of the pre-oxidised specimens has been compared to as received specimens. At a maximum applied stress of 800 MPa a significant fatigue life deficit is observed in the pre-oxidised testpieces. This is accompanied with the observations of significant cracking of the external chromia scale and the intergranular internal oxides within the area of maximum stress. Preferential cracking of oxides may lead to early crack initiation and consequently a reduction in total fatigue life.

AB - The effect of prior oxidation on the room temperature fatigue life of coarse grained Ni based superalloy, RR1000 has been performed at an R ratio of 0·1 with two pre-oxidation times: 100 and 2000 h at 700°C. These pre-exposures produce extensive oxidation damage. The room temperature high cycle fatigue life of the pre-oxidised specimens has been compared to as received specimens. At a maximum applied stress of 800 MPa a significant fatigue life deficit is observed in the pre-oxidised testpieces. This is accompanied with the observations of significant cracking of the external chromia scale and the intergranular internal oxides within the area of maximum stress. Preferential cracking of oxides may lead to early crack initiation and consequently a reduction in total fatigue life.

KW - oxidation

KW - fatigue crack initiation

KW - high cycle fatigue

U2 - 10.1179/0960340914Z.00000000064

DO - 10.1179/0960340914Z.00000000064

M3 - Article

SN - 0960-3409

VL - 32

SP - 68

EP - 73

JO - Materials at High Temperatures

JF - Materials at High Temperatures

IS - 1-2

ER -

Effect of prior oxidation on high cycle fatigue performance of RR1000 and role of oxidation in fatigue crack initiation

Abstract

Keywords

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Structural Metallic Systems For Advanced Gas Turbine Applications

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