Effect of environment on notch fatigue resistance of CMSX4
Effect of environment on notch fatigue resistance of CMSX4
Crack nucleation/initiation at high temperatures has been studied in CMSX4 in both air and vacuum environments, to elucidate the effect of oxidation on the notch fatigue initiation process. In air, crack nucleation/initiation occurred at subsurface interdendritic pores in all cases. The subsurface crack grows initially under vacuum conditions, before breaking out to the top surface. Lifetime is then dependent on initiating pore size and distance from the notch root surface. In vacuum conditions, crack nucleation/initiation has been observed more consistently from surface or close-to-surface pores, indicating that surface oxidation is in-filling/‘healing’ surface pores or providing significant local stress transfer to shift initiation to subsurface pores.
CMSX4, fatigue initiation, environment, pores, crack nucleation
1439-1445
Miller, M.D.
0a80ae6f-550d-4bb4-9b64-a335270b8ae9
Reed, P.A.S.
8b79d87f-3288-4167-bcfc-c1de4b93ce17
Joyce, M.R.
e294d1ba-c37a-4149-b9c0-15095d643d3b
Henderson, M.B.
bfe707ae-a07d-4739-9f75-29292f2f46de
Brooks, J.W.
cdc5d441-8e90-4c86-923c-564ed1edb6cf
Wilcock, I.
95ffb033-802a-4740-bc23-c9a8b12d698f
Wu, X.
b6ec2d37-5357-42db-a350-a73969909549
December 2007
Miller, M.D.
0a80ae6f-550d-4bb4-9b64-a335270b8ae9
Reed, P.A.S.
8b79d87f-3288-4167-bcfc-c1de4b93ce17
Joyce, M.R.
e294d1ba-c37a-4149-b9c0-15095d643d3b
Henderson, M.B.
bfe707ae-a07d-4739-9f75-29292f2f46de
Brooks, J.W.
cdc5d441-8e90-4c86-923c-564ed1edb6cf
Wilcock, I.
95ffb033-802a-4740-bc23-c9a8b12d698f
Wu, X.
b6ec2d37-5357-42db-a350-a73969909549
Miller, M.D., Reed, P.A.S., Joyce, M.R., Henderson, M.B., Brooks, J.W., Wilcock, I. and Wu, X.
(2007)
Effect of environment on notch fatigue resistance of CMSX4.
Materials Science and Technology, 23 (12), .
(doi:10.1179/174328407X213198).
Abstract
Crack nucleation/initiation at high temperatures has been studied in CMSX4 in both air and vacuum environments, to elucidate the effect of oxidation on the notch fatigue initiation process. In air, crack nucleation/initiation occurred at subsurface interdendritic pores in all cases. The subsurface crack grows initially under vacuum conditions, before breaking out to the top surface. Lifetime is then dependent on initiating pore size and distance from the notch root surface. In vacuum conditions, crack nucleation/initiation has been observed more consistently from surface or close-to-surface pores, indicating that surface oxidation is in-filling/‘healing’ surface pores or providing significant local stress transfer to shift initiation to subsurface pores.
Text
mst7907SX.pdf
- Other
Restricted to Registered users only
Request a copy
More information
Published date: December 2007
Keywords:
CMSX4, fatigue initiation, environment, pores, crack nucleation
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 65057
URI: http://eprints.soton.ac.uk/id/eprint/65057
ISSN: 0267-0836
PURE UUID: 97570495-fb97-4edd-a6f4-fbae3c9aa47b
Catalogue record
Date deposited: 29 Jan 2009
Last modified: 16 Mar 2024 02:44
Export record
Altmetrics
Contributors
Author:
M.D. Miller
Author:
M.R. Joyce
Author:
M.B. Henderson
Author:
J.W. Brooks
Author:
I. Wilcock
Author:
X. Wu
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics
