Small Scale Plasticity

The Laboratory of Materials Science at Tampere University of Technology, Finland is looking for a PhD student in the field of micromechanics of materials studied in-situ in SEM under extreme deformation conditions - high temperatures and high strain rates. The position will be filled now for a fixed period of four (4) years.

Toulouse, May 10-12th, 2017

For more see:

https://mecano2016.sciencesconf.org

In this paper in the Journal of the Mechanics and Physics of Solids (vol. 84, p. 358, 

http://authors.elsevier.com/a/1Rk5057Zjdx-o ) we propose a
new theory for the mechanical properties of fivefold twinned nanowires.

We show that the Frank vector of the central wedge disclination depends on the uniaxial strain,

The project is based on the well-known size effect exhibited by metals, i.e
the fact that their strengths are greatly enhanced when at least one
microstructural lengthscale is scaled down to the nanometer range or
when the size of the object is restricted to the micron or sub-micron
range. At these scales the interfaces and their associated properties
play a significant role. This project will focus on the effect of
spatial confinement on the three most common deformation mechanisms:
dislocation glide, mechanical twinning and mechanically-induced
martensitic phase transformations; and will be based on the synergies
between physically-based phenomenological modelling using
strain-gradient plasticity at the highest scale, and thorough