Imperial College London
Alternate

ProfessorFionnDunne

Faculty of Engineering, Department of Materials

Principal Research Fellow
 
 
 
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Contact

 

+44 (0)20 7594 2884fionn.dunne

 
 
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Location

 

104Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Zhang:2016:10.1016/j.actamat.2016.07.044,
author = {Zhang, Z and Jun, T-S and Britton, TB and Dunne, FPE},
doi = {10.1016/j.actamat.2016.07.044},
journal = {Acta Materialia},
pages = {317--330},
title = {Intrinsic anisotropy of strain rate sensitivity in single crystal alpha titanium},
url = {http://dx.doi.org/10.1016/j.actamat.2016.07.044},
volume = {118},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The room temperature intrinsic strain rate sensitivities (SRS) of basal and prismatic slip systems have been determined for the α (HCP) phase of a titanium alloy (Ti-6242), through coupled crystal plasticity modelling and micro-pillar compression experiments. Load-displacement data from displacement hold tests, in both experiment and simulation, have enabled determination of the rate-dependent slip rule within the crystal plasticity model. Slip system SRS has been obtained, via micro-pillars orientated for single basal and prismatic slip. Crystal plasticity modelling explicitly captures micro-pillar geometry, crystal orientation, as well as the stiffnesses of components of the experimental testing frame and sample mounting. Consideration of the stiffness of the adhesive and load frame is shown to be essential for extraction of the intrinsic rate-dependent material response, rather than the structural response, even in single phase micro-pillar compression experiments. We find that the intrinsic SRS of basal slip is stronger than that for prismatic slip. This finding has significant implications in understanding the anisotropic rate-dependent response of hexagonal materials applied extensively under extreme loading conditions.
AU  - Zhang,Z
AU  - Jun,T-S
AU  - Britton,TB
AU  - Dunne,FPE
DO  - 10.1016/j.actamat.2016.07.044
EP  - 330
PY  - 2016///
SN  - 1359-6454
SP  - 317
TI  - Intrinsic anisotropy of strain rate sensitivity in single crystal alpha titanium
T2  - Acta Materialia
UR  - http://dx.doi.org/10.1016/j.actamat.2016.07.044
UR  - http://hdl.handle.net/10044/1/37408
VL  - 118
ER  -
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