Imperial College London
Emeritus Professor Trevor Lindley

Emeritus ProfessorTrevorLindley

Faculty of Engineering, Department of Materials

Emeritus Professor
 
 
 
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Contact

 

+44 (0)20 7594 6735t.lindley

 
 
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Location

 

Goldsmiths 106Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@unpublished{Trant:2020,
author = {Trant, CF and Lindley, TC and Martin, N and Dixon, M and Dye, D},
publisher = {arXiv},
title = {Fatigue cracking in gamma titanium aluminide},
url = {http://arxiv.org/abs/2007.04764v1},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - UNPB
AB  - Fatigue crack initiation and growth were examined in cast and HIP'ed\textgamma-TiAl 4522XD. It was found that fatigue crack growth rates werehigher at $750\celsius$ than $400\celsius$, but that $\Delta K_\mathrm{th}$ wasalso higher. Temperature excursions between $400$ and $750\celsius$ duringfatigue crack growth resulted in retardation of the crack growth rate, both onheating and cooling; however heating from 400 to $750\celsius$ at a $\Delta K$that would then be below threshold did not result in complete crack arrest. Itwas also found that for notches $0.6$~mm in length and smaller, initiation fromthe microstructure could instead be observed at stresses similar to thematerial failure stress; a microstructural initiation site exists. Secondarycracking around borides could also be observed. A change from trans- to mixedtrans-, inter- and intra-lamellar cracking could be observed where theestimated size of the crack tip plastic zone exceeded the colony size. Changesin fracture surface morphology could not be related to the temperature offatigue crack growth, although this could be observed from the oxide scalecolouration. Compressive pre-loading of a crack results in retardation of thecrack, which could also be observed from the oxide.
AU  - Trant,CF
AU  - Lindley,TC
AU  - Martin,N
AU  - Dixon,M
AU  - Dye,D
PB  - arXiv
PY  - 2020///
TI  - Fatigue cracking in gamma titanium aluminide
UR  - http://arxiv.org/abs/2007.04764v1
UR  - http://hdl.handle.net/10044/1/80775
ER  -
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