Imperial College London
Portrait Picture

Professor Dan Balint

Faculty of Engineering, Department of Mechanical Engineering

Professor in Solid Mechanics
 
 
 
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Contact

 

+44 (0)20 7594 7084d.balint Website

 
 
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Location

 

519City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Xu:2019:10.1016/j.surfcoat.2019.06.045,
author = {Xu, Y and Balint, D and Dini, D},
doi = {10.1016/j.surfcoat.2019.06.045},
journal = {Surface and Coatings Technology},
pages = {763--773},
title = {A new hardness formula incorporating the effect of source density on indentation response: a discrete dislocation plasticity analysis},
url = {http://dx.doi.org/10.1016/j.surfcoat.2019.06.045},
volume = {374},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Planar discrete dislocation plasticity (DDP) calculations that simulate thin single crystal films bonded to a rigid substrate indented by a rigid wedge are performed for different values of film thickness and dislocation source density. As in prior studies, an indentation size effect (ISE) is observed when indentation depth is sufficiently small relative to the film thickness. Thedependence of the ISE on dislocation source density is quantified in this study, and a modified form of the scaling law for the dependence of hardness on indentation depth, first derived by Nix and Gao, is proposed, which is valid over the entire range of indentation depths and correlates the length scale parameter with the average dislocation source spacing. Nanoindentation experimental data from the literature are fitted using this formula, which further verifies the proposed scaling of indentation pressure on dislocation source density.
AU  - Xu,Y
AU  - Balint,D
AU  - Dini,D
DO  - 10.1016/j.surfcoat.2019.06.045
EP  - 773
PY  - 2019///
SN  - 0257-8972
SP  - 763
TI  - A new hardness formula incorporating the effect of source density on indentation response: a discrete dislocation plasticity analysis
T2  - Surface and Coatings Technology
UR  - http://dx.doi.org/10.1016/j.surfcoat.2019.06.045
UR  - http://hdl.handle.net/10044/1/70606
VL  - 374
ER  -
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