Symposium TC06—Mechanical Behavior at the Micro and Nanoscale—Bridging Between Computer Simulations and Experiments

Mechanical properties of small objects are a function of their characteristic length scale, especially when one of the scales is reduced into the sub-micrometer regime (such us nanowires, thin films, nanoparticles and micropillars). At these scales, the measured strength can be sensitive to both changes in sample shape and size, leading to interesting phenomena such as augmented strength and scattered response. The current frontiers in the field aims at understanding the deformation and failure mechanisms on the different length scales, in order to exploit them to tailor materials properties to the loading condition. The multiscale nature of this problem brings new challenges, e.g., understanding the effects of interfaces, grain-boundaries and surfaces on dislocation motion, nucleation of defects at surfaces and interfaces, and the effects of temperature on stiffness and brittleness.

The focus of this symposium lies on the structure-dependent small-scale mechanical properties in micro- and nanoscale structures from the perspectives of theory, simulation, and experiment and how to bridge between them. This symposium invites abstracts that discuss sample size effects, nanoscale mechanical testing, in-situ characterization and modeling of small-scale materials. The properties to be covered include strength, plastic flow, fatigue and fracture. Abstracts that address both experimental and modeling aspects, with an emphasis on how to link between these different scales and techniques, are solicited.

Topics will include:

  • Mechanical phenomena in small-scale materials and structures, including thin films and multilayers, micro- and nanopillars, nanoparticles, nanowires and -tubes, nanocomposites and ultra-fine and nanocrystalline materials
  • Multiscale modeling and simulations of mechanical behavior of micro- and nanostructures, including atomistic simulations of lattice defects (dislocations, diffusion of point defects, grain boundaries, interfaces), dislocation dynamics simulations and microstructural-based continuum models
  • Size and length scale effects in the mechanical response
  • Interaction between dislocations and planar defects (grain boundaries and interfaces)
  • Temperature-dependent strength on the nanoscale and microstructural thermally-activated processes (e.g., dislocation nucleation, cross-slip, climb)
  • Microstructural evolution during deformation and new deformation mechanisms
  • Nanoindetation of low-dimensional specimens, including thin-films, nanowires, pillars, nanoparticles, and nonporous materials
  • Ex-situ and in-situ mechanical characterization
  • Advances in experimental techniques for characterization of microstructure

Invited Speakers:

  • Erik Bitzek (University of Erlangen-Nuremberg, Germany)
  • Julie Cairney (University of Sidney, Australia)
  • Benoit Devincre (CNRS / ONERA, France)
  • Jaafer A. El-Awady (Johns Hopkins University, USA)
  • Daniel S. Gianola (University of California, Santa Barbara, USA)
  • Seung Min J. Han (Korea Advanced Institute of Science and Technology, Republic of Korea)
  • Daniel Kiener (Montanuniversität Leoben, Austria)
  • Christoph Kirchlechner (Max-Planck-Institut für Eisenforschung GmbH, Germany)
  • Jon Molina-Aldareguia (IMDEA Materials Institute, Spain)
  • Sang Ho Oh (Pohang University of Science and Technology, Republic of Korea)
  • Stefan Sandfeld (University of Erlangen-Nuremberg, Germany)
  • David J. Srolovitz (University of Pennsylvania, USA)
  • Christopher Weinberger (Colorado State University, USA)
  • Qian Yu (Zhejiang University, China)

Symposium Organizers

Dan Mordehai
Technion
Mechanical Engineering
Israel

Julia R. Greer
California Institute of Technology
Division of Engineering and Applied Science
USA
626-395-4127, jrgreer@caltech.edu

Marc Legros
CEMES-CNRS
France

Ruth Schwaiger
Karlsruhe Institute of Technology, Institute for Applied Materials (IAM-WBM)
Germany
49-721-608-24878, ruth.schwaiger@kit.edu