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08:32
Indirect Fabrication of Lattice Metals with Thin Sections Using Centrifugal Casting
Published on: May 14, 2016
Continuum modeling of bulk metallic glasses and composites
Fadi Abdeljawad1, Mikko Haataja
1Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544, USA. fabdelja@princeton.edu
Physical Review Letters
|September 28, 2010
Summary
Tailoring microstructure in bulk metallic glasses (BMGs) enhances ductility by promoting homogeneous plastic deformation. Simulations reveal short-range correlations and particle size are key to improving BMG mechanical properties.
Area of Science:
- Materials Science
- Mechanical Engineering
- Condensed Matter Physics
Background:
- Bulk metallic glasses (BMGs) possess high strength and elasticity at low temperatures.
- BMGs suffer from limited ductility due to localized deformation and shear band propagation.
- Microstructural tailoring offers a promising route to enhance BMG ductility.
Purpose of the Study:
- To quantitatively analyze the influence of microstructure on the deformation behavior of monolithic BMGs and BMG composites.
- To identify key microstructural features governing ductility in BMGs.
- To provide insights for improving the mechanical properties of BMGs.
Main Methods:
- A continuum approach was employed for quantitative analysis.
- Computational simulations were used to model deformation behavior.
- The study investigated both monolithic BMGs and BMG composites.
Main Results:
- Short-ranged structural correlations were found to be crucial for ductility in monolithic BMGs.
- Particle size was identified as a critical factor controlling ductility in BMG composites.
- The findings highlight the importance of microstructural features at different length scales.
Conclusions:
- Microstructural design is essential for overcoming the ductility limitations of BMGs.
- Understanding structure-property relationships enables the development of advanced BMGs.
- This research opens new avenues for enhancing the mechanical performance of bulk metallic glasses.
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