2018 MRS Spring Meeting

Call for Papers

Symposium CM05—Strain Localization, Avalanches and Intermittent Deformation Mechanisms

Many materials exhibit a stochastic deformation response that can be detrimental for structural applications, but that also allow deep insights into how the underlying defect structure evolves. Due to the confinement in both space and time, intermittent plasticity has been challenging materials scientists for a long time. Classical examples encompass intermittent flow of single crystals or dynamic strain aging. More recent materials classes sharing spatiotemporal deformation dynamics are metallic glasses and high entropy alloys. In all of these materials, deformation is typically understood with respect to well defined structural excitations (e.g. dislocations, shear transformations, etc.), that traditionally have been characterized with mean properties of the evolving defect structure. A renewed interest in spatiotemporal deformation reveals that some aspects of plastic deformation are scale-free, being well described with power-law distributions known from general theories of critically evolving systems that lack a well-defined mean. With the advent of novel experimental and computational tools, it has now become possible to track the details of spatiotemporal deformation dynamics. This symposium seeks to discuss the underlying structural mechanisms for strain localization, avalanche dynamics, and intermittent deformation across all length and time-scales of condensed matter. This includes the experimental characterization of these phenomenon, novel model development, simulations and theory, and pathways how to predict and/or suppress stochastic flow via materials design.

Topics will include:

  • Discrete deformation of crystalline materials across all length scales
  • Shear-band structure, formation and dynamics in metallic glasses
  • Dislocation avalanche dynamics
  • Structural excitations and defect distributions in metallic glasses
  • Intermittency in fracture
  • Serrated flow of high entropy alloys
  • Statistical characterization of intermittent deformation and self-organized critical behavior
  • General theory and microstructural modelling describing avalanche behavior
  • Emerging experimental methods to trace intermittent deformation in single as well as polycrystalline systems
  • Constitutive model development for strain localizing materials
  • Incorporating structural and temporal stochasticity in theories of deformation and failure
  • Marginal stability

Invited Speakers:

  • Armand Beaudoin (The Cornell High Energy Synchrotron Source, USA)
  • Elisabeth Bouchaud (EC2M, ESPCI Paris, France)
  • Karin Dahmen (University of Illinois at Urbana-Champaign, USA)
  • Dennis Dimiduk (Ohio State University, USA)
  • Peter Ispanovity (Eotvos University, Hungary)
  • Joerg Loeffler (Swiss Federal Institute of Technology (ETH) Zurich, Switzerland)
  • Kirsten Martens (Universite Grenoble Alps, France)
  • Stefanos Papanikolaou (West Virginia University, USA)
  • David Rodney (University of Lyon, France)
  • Christopher Rycroft (Harvard University, USA)
  • Konrad Samwer (University of Goettingen, Germany)
  • Fulin Shang (Xi’an Jiaotong University, China)
  • Yunfeng Shi (Rensselaer Polytechnic, USA)
  • Michael Shields (Johns Hopkins University, USA)
  • Georgios Tsekenis (University of Oregon, USA)
  • Jerome Weiss (Centre National de la Recherche Scientifique Grenoble, France)
  • Gerhard Wilde (University of Muenster, Germany)
  • Wendelin Wright (Bucknell University, USA)
  • Matthieu Wyart (École Polytechnique Federale de Lausanne, Switzerland)
  • Michael Zaiser (University of Erlangen, Germany)

Symposium Organizers

Michael Falk
Johns Hopkins University
Whiting School of Engineering
410-929-4242, mfalk@jhu.edu

Christopher Woodward
Air Force Research Laboratory
Materials and Manufacturing Directorate

Keywords for Abstract Submission

avalanches, deformation mechanisms, intermittency, plasticity, strain localization