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High Cycle Fatigue and Range-Mean Performance of Emerging Titanium Alloys for Aeroengine Applications

Pete Davies, Sean John, Helen Davies Orcid Logo, Martin Bache, Kate Fox, Christopher Collins, Nigel Martin, Rebecca Sandala

Metals, Volume: 16, Issue: 6, Pages: 631 - 631

Swansea University Authors: Pete Davies, Sean John, Helen Davies Orcid Logo, Martin Bache

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DOI (Published version): 10.3390/met16060631

Abstract

Four alpha-beta titanium alloys, containing increased beta stabilising elements when compared to the well established Ti-6Al-4V, were previously characterised for their low cycle fatigue behaviour and resistance to cold dwell sensitivity. The same four alloys are now assessed for high cycle fatigue...

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Published in: Metals
ISSN: 2075-4701
Published: MDPI AG 2026
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa72133
Abstract: Four alpha-beta titanium alloys, containing increased beta stabilising elements when compared to the well established Ti-6Al-4V, were previously characterised for their low cycle fatigue behaviour and resistance to cold dwell sensitivity. The same four alloys are now assessed for high cycle fatigue performance, employing plain cylindrical and notched specimen geometries. Fatigue strength under load-controlled cycling was measured under two contrasting mean stress conditions, a fully reversed R = −1 waveform and a positive mean stress waveform of R = 0.3. The role of microstructure and micro-texture are considered to explain the relative high cycle fatigue behaviour of each alloy and in particular the mechanisms responsible for fatigue crack initiation. The data are subsequently employed to construct “safe stress” range-mean diagrams.
Keywords: titanium alloys; high cycle fatigue; notch fatigue; range-mean behaviour
College: Faculty of Science and Engineering
Funders: This research was conducted under the UK Aerospace Technology Institute (ATI) BETA project, application number: 10052028.
Issue: 6
Start Page: 631
End Page: 631

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