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

@article{Joseph:2018:10.1016/j.ijplas.2018.06.009,
author = {Joseph, S and Lindley, T and Dye, D},
doi = {10.1016/j.ijplas.2018.06.009},
journal = {International Journal of Plasticity},
pages = {38--56},
title = {Dislocation interactions and crack nucleation in a fatigued near-alpha titanium alloy},
url = {http://dx.doi.org/10.1016/j.ijplas.2018.06.009},
volume = {110},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Dislocation interactions at the crack nucleation site were investigated in near-alpha titanium alloy Ti-6242Si subjected to low cycle fatigue. Cyclic plastic strain in the alloy resulted in dislocation pile-ups in the primary alpha grains, nucleated at the boundaries between the primary alpha and the two-phase regions. These two phase regions provided a barrier to slip transfer between primary alpha grains. We suggest that crack nucleation occurred near the basal plane of primary alpha grains by the subsurface double-ended pile-up mechanism first conceived by Tanaka and Mura. Superjogs on the basal dislocations were observed near the crack nucleation location. The two phase regions showed direct transmission of dislocations between secondary alpha plates, transmitted through the beta ligaments as , which then decompose into dislocation networks in the beta. The beta ligaments themselves do not appear to form an especially impenetrable barrier to slip, in agreement with the micropillar and crystal plasticity investigations of Zhang et al.
AU  - Joseph,S
AU  - Lindley,T
AU  - Dye,D
DO  - 10.1016/j.ijplas.2018.06.009
EP  - 56
PY  - 2018///
SN  - 0749-6419
SP  - 38
TI  - Dislocation interactions and crack nucleation in a fatigued near-alpha titanium alloy
T2  - International Journal of Plasticity
UR  - http://dx.doi.org/10.1016/j.ijplas.2018.06.009
UR  - http://hdl.handle.net/10044/1/61553
VL  - 110
ER  -
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