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{Poole:2021:10.1016/j.msea.2021.141176,
author = {Poole, B and Dunne, F},
doi = {10.1016/j.msea.2021.141176},
journal = {Materials Science and Engineering: A},
title = {Slip band interactions and GND latent hardening in a galling resistant stainless steel},
url = {http://dx.doi.org/10.1016/j.msea.2021.141176},
volume = {813},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Slip activation, slip band interactions, and GND densities in iron-base, galling resistant alloy Nitronic 60 have been characterised at the grain length scale using small-scale mechanical testing with high resolution digital image correlation and high-angular resolution electron backscatter diffraction. By correlating the two measurement techniques, new insight into slip band interactions, the generation of lattice curvature and the corresponding accumulation of geometrically necessary dislocations (GNDs) is provided. Multiple discrete slip bands are typically active within single grains, resulting in significant slip band interactions. Crossing slip bands were found to generate accumulations of GNDs. Regions where slip bands block other slip bands were associated with the highest GND densities, in excess of three time the densities of crossing slip bands. Representative crystal plasticity modelling investigations have demonstrated that discrete slip blocking events are responsible for locally elevated GND density. This behaviour is rationalised in terms of lattice curvature associated with the differing levels of constraint provided by the crossing or blocking-type behaviours. Ferrite grains are also found to contribute to the generation of GNDs. Together, these two effects provide significant work hardening mechanisms, likely to be key to the development of future iron-base hard facing alloys.
AU  - Poole,B
AU  - Dunne,F
DO  - 10.1016/j.msea.2021.141176
PY  - 2021///
SN  - 0921-5093
TI  - Slip band interactions and GND latent hardening in a galling resistant stainless steel
T2  - Materials Science and Engineering: A
UR  - http://dx.doi.org/10.1016/j.msea.2021.141176
UR  - http://hdl.handle.net/10044/1/90314
VL  - 813
ER  -
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