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Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
Shear induced structural ordering of a model metallic glass
Anatolii V Mokshin1, Jean-Louis Barrat
1Laboratoire de Physique de la Matiere Condensee et des Nanostructures, Universite de Lyon, Universite Lyon I, CNRS, UMR 5586, 43 Boulevard du 11 Novembre 1918, 69622 Villeurbanne Cedex, France. avm@kazan-spu.ru
The Journal of Chemical Physics
|January 29, 2009
Summary
Shear flow induces ordering in glassy systems, transforming them into strained crystalline states via nucleation. This study explores ordering characteristics and transition rates under varying conditions.
Area of Science:
- Condensed matter physics
- Materials science
- Computational chemistry
Background:
- Glassy systems are disordered materials lacking long-range order.
- Understanding their response to external stimuli like shear flow is crucial.
- Nonequilibrium processes in amorphous solids are complex and not fully understood.
Purpose of the Study:
- To investigate shear-induced ordering in a one-component glassy system.
- To explore the transformation into a strained crystalline state.
- To analyze the influence of strain rates and temperatures on ordering.
Main Methods:
- Nonequilibrium molecular dynamics simulations were employed.
- A one-component glassy system was subjected to shear flow.
- Nucleation events leading to ordering were observed and analyzed.
Main Results:
- The glassy system transformed into a strained crystalline state.
- This transformation occurred through well-defined nucleation events.
- Ordering characteristics varied with different strain rates and temperatures.
Conclusions:
- Shear flow can induce significant structural ordering in glassy systems.
- Nucleation is a key mechanism for this shear-induced crystalline transformation.
- Transition rates are influenced by external conditions like temperature and strain rate.
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