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

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


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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Published date: 2005


Local EPrints ID: 23318
ISSN: 0142-1123
PURE UUID: 451ba3e6-aecc-4d28-afe5-ac649906c06c
ORCID for P. Reed: ORCID iD

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

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

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