University of Cambridge > Talks.cam > Surfaces, Microstructure and Fracture Group > Slip Circle Constructions for Dislocation Plasticity, with Special Reference to Nanoindentations

Slip Circle Constructions for Dislocation Plasticity, with Special Reference to Nanoindentations

Add to your list(s) Download to your calendar using vCal

If you have a question about this talk, please contact Stephen Walley.

On general grounds, it is expected that plastic flow with increasing strain and length scale of inhomogeneity undergoes a laminar to rotational transition, rather like any fluid flow. When this is applied to indentation plasticity, one finds that rotational flow produces a density of geometrically necessary dislocations which can provide a quantitative account of the indentation size effect. But at very small indentations, laminar flow occurs, with build-up of material under the indenter. Combining these two flow patterns in parallel seems to provide a quantitative account of the observed hardness behaviour.

This talk is part of the Surfaces, Microstructure and Fracture Group series.

Tell a friend about this talk:

This talk is included in these lists:

Note that ex-directory lists are not shown.

 

© 2006-2019 Talks.cam, University of Cambridge. Contact Us | Help and Documentation | Privacy and Publicity