After a silence of three decades, bulk metallic glasses and
their composites have re-emerged as a
competent engineering material owing to their excellent
mechanical properties not observed in any
other engineering material known till date. However,
they exhibit poor ductility and little or no
toughness which make them brittle and they fail
catastrophically under tensile loading. Exact
explanation of this behaviour is difficult, and a lot
of expensive experimentation is needed before
conclusive results could be drawn. In present study, a
theoretical approach has been presented aimed at
solving this problem. A detailed mathematical model has been developed to
describe solidification phenomena in zirconium
based bulk metallic glass matrix composites during additive manufacturing. It
precisely models and predicts solidification parameters
related to microscale solute diffusion (mass transfer)
and capillary action in these rapidly solidifying sluggish slurries.
Programming and simulation of model is performed
in MATLAB®. Results show that the use of
temperature dependent thermophysical
properties yields a synergic effect for multitude improvement and refinement
simulation results. Simulated values proved out
to be in good agreement with prior simulated and experimental results. There is significant effect of initial metal
temperature, composition, type of alloying elements,temperature gradient and
thermo-physical properties on final microstructure developed as a result of
heat and mass transfer phenomena.
Author
(s) Details
Muhammad Musaddique
Ali Rafique
Eastern Engineering Solutions LLC, Detroit, MI, USA.
View Book :- https://bp.bookpi.org/index.php/bpi/catalog/book/263
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