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Effect of temperature and secondary orientation on notch fatigue resistance of CMSX4

Record type: Article

A turbine blade root contains notches that locate into a “fir-tree” root fixing in the turbine disc. Fatigue initiation in these stress concentrating features is of some concern. When a turbine blade is cast, the primary orientation along the blade is controlled (usually in the <001> direction) to within certain limits, however the secondary orientation (i.e. the orientation of any notches) is not generally controlled. The notch fatigue crack initiation and growth behaviour of CMSX-4 under low cycle fatigue conditions has been investigated at 650°C and 725°C. Two secondary orientations have been investigated and a separate oxidation study has been conducted. Heavy oxidation is observed in the notch root after a short amount of time at 650°C. At high temperatures, crack initiation occurs at subsurface pores.

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Citation

Miller, M., Reed, P. and Joyce, M. (2005) Effect of temperature and secondary orientation on notch fatigue resistance of CMSX4 International Journal of Fatigue

More information

Published date: 2005

Identifiers

Local EPrints ID: 23318
URI: http://eprints.soton.ac.uk/id/eprint/23318
ISSN: 0142-1123
PURE UUID: 451ba3e6-aecc-4d28-afe5-ac649906c06c
ORCID for P. Reed: ORCID iD orcid.org/0000-0002-2258-0347

Catalogue record

Date deposited: 04 May 2007
Last modified: 17 Jul 2017 16:17

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Contributors

Author: M. Miller
Author: P. Reed ORCID iD
Author: M. Joyce

University divisions


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