The University of Southampton
University of Southampton Institutional Repository

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

Effect of temperature and secondary orientation on notch fatigue resistance of CMSX4
Effect of temperature and secondary orientation on notch fatigue resistance of CMSX4
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.
0142-1123
Miller, M.
1d3ece62-0f07-44fc-8198-5ae9d8ab2b0d
Reed, P.
8b79d87f-3288-4167-bcfc-c1de4b93ce17
Joyce, M.
6175296e-1478-408a-8a5e-962981489936
Miller, M.
1d3ece62-0f07-44fc-8198-5ae9d8ab2b0d
Reed, P.
8b79d87f-3288-4167-bcfc-c1de4b93ce17
Joyce, M.
6175296e-1478-408a-8a5e-962981489936

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

Record type: Article

Abstract

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.

Text
19.pdf - Other
Download (506kB)

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: 16 Mar 2024 02:44

Export record

Contributors

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

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

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×