Surface machining condition and fatigue life on Inconel 718

ARRAZOLA, PEDRO JOSE

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Title

Surface machining condition and fatigue life on Inconel 718

xmlui.dri2xhtml.METS-1.0.item-contributorOtherinstitution

Tecnun Ceit-IK4
ITP Aero

Version

http://purl.org/coar/version/c_970fb48d4fbd8a85

Rights

Access

http://purl.org/coar/access_right/c_abf2

URI

https://hdl.handle.net/20.500.11984/5546

Publisher’s version

https://doi.org/10.1016/j.prostr.2018.12.339

Published at

Procedia Structural Integrity Vol. 13. Pp. 1609-1614. Elsevier, 2018

Publisher

Elsevier

Keywords

Machining
Surface Condition
Fatigue
High Temperature ... [+]

Machining
Surface Condition
Fatigue
High Temperature
Inconel 718 [-]

Abstract

Life assessment of components working in aero-engines at elevated temperatures is critical. Machining has a serious effect on these nickel-based alloys, for example in turbine discs, affecting their life in service. Machining (turning, broaching…) modifies surface roughness, thickness of the affected substrate layer (including the effect of possible broken carbides) and residual stress distribution near the component surface. On top of that, it is possible to shot-peen or not the component, which again modifies its surface integrity. The aim of this work is to discern among the effect of the different parameter: roughness, damage and residual stresses on fatigue performance and optimum machining conditions. [-]