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Effect of Environment on Notch Fatigue Initiation Resistance in CMSX4

Reed, P.A.S. and Miller, M.D. (2005) Effect of Environment on Notch Fatigue Initiation Resistance in CMSX4 At TMS Spring Meeting. 01 Feb 2005. 2 pp.

Record type: Conference or Workshop Item (Paper)

Abstract

Crack 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 initiation occurred at sub-surface interdendritic pores in all cases. The sub-surface crack grows initially under vacuum conditions, before breaking out to the top surface. Lifetime is then critically dependent on initiating pore size and distance from the notch root surface. In vacuum conditions, crack 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 sub-surface pores.

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More information

Published date: 2005
Venue - Dates: TMS Spring Meeting, 2005-02-01 - 2005-02-01
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 43047
URI: http://eprints.soton.ac.uk/id/eprint/43047
PURE UUID: 6e60d1e7-4ca5-434b-9626-f56b1044f46b
ORCID for P.A.S. Reed: ORCID iD orcid.org/0000-0002-2258-0347

Catalogue record

Date deposited: 10 Jan 2007
Last modified: 17 Jul 2017 15:20

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Contributors

Author: P.A.S. Reed ORCID iD
Author: M.D. Miller

University divisions

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