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Thermo-Mechanical Fatigue Crack Growth and Phase Angle Effects in Ti6246

Jennie Palmer, Jonathan Jones, Mark Whittaker Orcid Logo, Steve Williams

Materials, Volume: 15, Issue: 18, Start page: 6264

Swansea University Authors: Jennie Palmer, Mark Whittaker Orcid Logo

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DOI (Published version): 10.3390/ma15186264

Abstract

A bespoke TMF crack growth test set-up has been developed and validated for use throughout this study and the effects of phasing between mechanical loading and temperature have been investigated. The study shows that TMF cycles may show increased crack growth rate behaviour when compared to isotherm...

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Published in: Materials
ISSN: 1996-1944
Published: MDPI AG 2022
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa61211
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Abstract: A bespoke TMF crack growth test set-up has been developed and validated for use throughout this study and the effects of phasing between mechanical loading and temperature have been investigated. The study shows that TMF cycles may show increased crack growth rate behaviour when compared to isothermal fatigue. The phase angle of the applied TMF cycle can also affect crack growth behaviour, with in-phase (IP) test conditions showing faster crack growth rates than out-of-phase (OP) test conditions. Propagating cracks interact with the microstructure of the material, in particular, the α/β interfaces within the prior beta grains and supporting fractography evidences subtle differences in fracture mechanisms as a result of phase angle.
Keywords: titanium; TMF; transgranular crack growth; thermography; profilometry
College: College of Engineering
Funders: Thanks is given to EPSRC and Rolls-Royce plc. for the funding of the programme (EP/H022309/1).
Issue: 18
Start Page: 6264