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Meeting Materials Science & Technology 2019
Symposium Bulk Metallic Glasses and their Composites – Progresses, Outcomes and Prospects
Organizer(s) Muhammad Musaddique Ali Rafique
Weidong Li, Corning
Junwei Qiao, Taiyuan University of Technology
Scope The objective of this symposium is to provide and increase fundamental theoretical and experimental understanding, and foresight of the methodologies adopted to solve longstanding debate of lack of ductility and toughness in these promising materials. These include; atomistic and part scale modeling and simulation, observation under synchrotron light and in microgravity conditions, machine learning, employing computationally intelligent techniques (e-g. support vector regression (SVR), artificial neural network (ANN), general regression neural network (GRNN), and multiple linear regression (MLR)), in-situ scanning and transmission electron microscopy observations, fracture toughness and additive manufacturing.
There has been tremendous interest observed in the development, processing and progress of these materials during past three decades. Main areas of focus have been;

a) Improvement of properties by alloying (e.g. stabilizers (Ta, Nb, V, Cu, Ni) or destabilizers (Sn and Al) and make an effort to eliminate Be).
b) Discover new alloying elements by machine learning.
c) Improve glass forming ability by use of computationally intelligent techniques.
d) Improving resistance to, or increase the number of, shear bands by improving length scale at which they interact or providing pivots to their motion and propagation.
e) Discover new algorithms based on plasticity (devitrification), solidification (classical nucleation theory and its modifications) and prediction of solidification microstructures by cellular automaton and phase field approaches and their variants (such as full field modeling).

A special focus and emphasis is led on new and rapidly evolving technique - additive manufacturing. It is hypothesized that a lot of promise exist in this to manufacture composite parts in one step eliminating the need of post processing. Discussion will be focused on explaining the advantages and disadvantages of this technique and lead strategies to approve this hypothesis. There is a lot of gap in understanding of fundamental science behind how a composite part can be formed by additive manufacturing? This symposium will try to answer these questions. Further areas of focus include;

a) Solidification microstructures during single layer additive manufacturing.
b) Solidification microstructures during double and multi-layer additive manufacturing.
c) Microstructures during re heating (devitrification).
d) Detailed qualitative and quantitative characterization of crystalline phases.
e) Thin films.
f) Control of processing parameters.
g) Process optimization, control and reproducibility.
Abstracts Due 04/05/2019
Proceedings Plan Planned: Other (journal publication, etc.; describe below)

Characterization of Localized Plastic Deformation and Serration Behaviors Associated with Dynamic Strain Aging in Pipeline Steels Using Digital Image Correlation
Confinement of He Precipitates Growth within Metal Nano-layers and Implications to Radiation Damage
DSC and X-ray Diffraction Investigation of Crystallization of Amorphous Co-Fe-Zr Alloys
Effect of Helium Morphology on Materials Strength in Pure Metals: Application of Richtmyer-Meshkov Instability to Bulk Measurement of Irradiated Properties
Enhanced Radiation Tolerance of Nanochannel W Films
Enhancing Ductility of Metallic Glasses by Tuning Nanoscale Structural Heterogeneity
Helium Bubble Evolution in Implanted Erbium Deuteride Bulk and Multilayered Structures
Hydrogen and Tritium Effects on Type 309L Stainless Steel
Ideal Metallic Glass
In-situ Observations of Bubble Evolution in Pd during He Implantation at Cryogenic Temperatures in a H2 Environment
In situ TEM Observation of Helium Bubble Formation under Dual Ion Beam Irradiation
Investigation of Crystallization and Relaxation in Metallic Glasses by High Rate Calorimetry
Nanobubbles and Nanocavities in Palladium as a Function of He
Nanoindentation of Bulk Metallic Glasses – Size Effects
Partition-dependent Selection of Glass-enabled Complex Intermetallics during Crystallization of Amorphous Al-Sm Alloys
Strain Delocalization and its Dependence on Microstructural Length Scales in Metallic Glass Matrix Composites
Structure Formation and Property Optimization of Metallic Glasses and Composites
Suppressing Helium Cavity Growth in Ni-based Concentrated Solid Solution Alloys

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