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Meeting Materials Science & Technology 2016
Symposium Symposium on Large Fluctuations and Collective Phenomena in Materials III
Sponsorship
Organizer(s) Xie Xie, The University of Tennessee
Karin Dahmen, University of Illinois at Urbana Champaign
Peter K. Liaw, University of Tennessee
Yong Zhang, University of Science and Technology Beijing
Scope “Noise” is everywhere in our daily life, such as the crackling noise arising from paper crumpling and fault movement during earthquakes. In materials science, the phenomenon of noise is also ubiquitous, particularly, in the study of the deformation behavior of materials, which usually manifests as serrated plastic flows. Over the past few years, this interesting and universal phenomenon has attracted tremendous research interest, which can be observed among a wide range of advanced materials, from ordered intermetallics, superalloys, granular matters, single-crystalline metals, AlMg alloys, low carbon and transformation-induced plasticity (TWIP)/ twinning-induced plasticity (TRIP) steels, shape-memory alloys, nano materials, high-entropy alloys to metallic glasses. To provide a physical understanding of the universal noise behavior, different elastic coupling models have been proposed, with a variety of scaling relations being predicted. However, the source of noise when these advanced materials are deformed is still being debated. To materials scientists, understanding the structural origin of the noise may help avoid catastrophic failure and, therefore, inform the design of plasticity in these advanced materials.
The proposed symposium will gather a diverse group of prominent experimentalists, computational scientists, and theoreticians working in related themes at the interface among Materials Science and Engineering, Physics, Mechanics, Earth Science, Biology, and Bio-engineering. The program focuses in particular on phenomena, which involve intermittent material responses, sometimes leading to the emergence of large fluctuations: Serrations in stress-strain curves, fracture and plasticity in crystalline or non-crystalline materials, granular materials, phase transition, martensitic transformations, structural relaxation near the glass-transition, the jamming transition, fracture-surface characterization, bio-cells, bio-engineering, or Barkhausen noise in magnetic materials. The fundamental understanding of these phenomena is facing considerable difficulties as the situations of interest are out-of-equilibrium and, hence, out of reach for conventional tools of materials science, statistical physics, mechanics, and thermodynamics. Moreover, these diverse phenomena involve physical processes occurring across many orders of magnitudes in space and time, which makes their theoretical treatment even more challenging.
The emergence of large fluctuations, however, can be broadly assigned to the competition between the small-scale disorder (structural disorder, defects, and heterogeneities) and long-range (elastic) interactions. This deep similarity substantiates the importance of a multidisciplinary dialog between the communities of scientists and engineers working on these diverse topics. Reviewing recent experimental progresses and stimulating the exchange of ideas, methods, approaches, and models across the boundaries of these topics are essential steps in the search for new theoretical paradigms that can help us account for many unexplained phenomena in these fields.
Explored topics include

(1) Deformation behavior of crystalline metals and alloys, amorphous materials, nanocrystalline materials, composites, and granular materials
(2) Shear-band formation, twining, detwinning, fatigue, plasticity, fracture morphology, earthquake, bio-cell, bio-engineering, fracture, etc. mechanisms
(3) Theoretical modeling and simulation
(4) Nondestructive materials testing and other applications
Abstracts Due 03/31/2016
Proceedings Plan Definite: MS&T all conference proceedings CD
PRESENTATIONS APPROVED FOR THIS SYMPOSIUM INCLUDE

A Master Equation for Force Distributions in Dense Granular Materials
Atomic and Electronic Basis for the Serration Behavior of Ultrastrong BCC Refractory High Entropy Alloys
Avalanches in Jammed Granular Materials
Collective Local Dynamics in Liquids, Colloids and Polymers
Collective Motion of Dislocation Associated with Local Plasticity Initiation and Macroscopic Properties in bcc Fe Alloys
Connecting Discrete Dislocation Slip and Deformation Behaviors in Nanocrystalline Ni: A Quantized Crystal Plasticity Study
Correlation between Serrated-flow Behavior and the Amorphous Structure of Metallic Glasses
Dislocation Activities during Deformation in High Entropy Alloy at Cryogenic Environment
Dynamic Mechanical Relaxations in Metallic Glasses
Fluctuations in Martensitic Transformations in Shape Memory Alloys Studied by a Mesoscale Model
Heat-treatment Effect on the Serrated Flows in AlxCoCrFeNi (x = 0.1, 0.3, 0.5, and 0.7) High-entropy Alloys (HEAs)
Loading Force Dependent Plastic Dynamics Transition of Chaotic and Self –organized Critical States in Ni62Nb38 Metallic Glass
Mechanical Behavior of Nanoglasses
Modeling Intermittent Plastic Strain Accumulation in Metallic Glasses as a Jump Markov Process
Multiscale Entropy Analysis on the Serrated Flow of Unirradiated and Irradiated Alloy Systems Undergoing Mechanical Testing at Different Strain Rates and Temperatures
Plastic Deformation Behavior of Double-side-notched Bulk Metallic Glasses
Serration Behavior in High-entropy Alloys
Spatiotemporal Slip Dynamics during Deformation of Microcrystals
Stick-slip Friction of Polymer Gels Having Controlled Surface Asperities
The Study of Serrated Plastic Flow in Refractory High Entropy Alloys
Thermodynamics of Critical Phenomena: Fluctuation and Anomaly


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