The effects of machined topography on fatigue life of a nickel based superalloy

D. T. Ardi, Y. G. Li, Hing Kai Chan, L. Blunt, M. R. Bache

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The surface topography of engineering components is known to affect fatigue behaviour. However, defining topography based on the average roughness (R a) parameter is considered to be inadequate when correlating to fatigue performance. Alternative correlations utilising areal topographic parameters would therefore be valuable. This has been addressed through areal topographic measurements and fatigue testing of an advanced nickel based superalloy, Alloy720Li. Low cycle and high cycle fatigue tests were performed at ambient temperature on specimens manufactured via different turning parameters to obtain S-N curves for different finishes. Supporting fractography is presented to emphasise the role of surface topography on fatigue crack initiation. The effects of different turned surface finishes on fatigue crack initiation are demonstrated and discussed.

Original languageEnglish
Pages (from-to)19-24
Number of pages6
JournalProcedia CIRP
Volume13
DOIs
Publication statusPublished - 2014

Fingerprint

Superalloys
Topography
Nickel
Fatigue of materials
Surface topography
Crack initiation
Fractography
Fatigue testing
Surface roughness
Temperature
Fatigue cracks

Cite this

Ardi, D. T. ; Li, Y. G. ; Chan, Hing Kai ; Blunt, L. ; Bache, M. R. / The effects of machined topography on fatigue life of a nickel based superalloy. In: Procedia CIRP. 2014 ; Vol. 13. pp. 19-24.
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The effects of machined topography on fatigue life of a nickel based superalloy. / Ardi, D. T.; Li, Y. G.; Chan, Hing Kai; Blunt, L.; Bache, M. R.

In: Procedia CIRP, Vol. 13, 2014, p. 19-24.

Research output: Contribution to journalArticle

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AU - Bache, M. R.

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