Modeling hardness of polycrystalline materials and bulk metallic glasses
نویسندگان
چکیده
منابع مشابه
Continuum modeling of bulk metallic glasses and composites.
At low temperatures, monolithic bulk metallic glasses (BMGs) exhibit high strength and large elasticity limits. On the other hand, BMGs lack overall ductility due to highly localized deformation mechanisms. Recent experimental findings suggest that the problem of catastrophic failure by shear band propagation in BMGs can be mitigated by tailoring microstructural features at different length sca...
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Abstract: In this paper, a systematic numerical simulation was performed to elucidate the damage mechanisms in bulk metallic glasses (BMGs) subjected to the tension-compression cyclic loading, and then the relation between fatigue life, applied strain, and cycling frequency was therefore presented. The free volume was selected as an internal state variable to depict the shear-band nucleation, g...
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will preside Professor P. Balaram, Director Date : Tuesday, 11th October 2011 Venue : Faculty Hall, Main Building Time : 4-00 p.m INDIAN INSTITUTE OF SCIENCE BANGALORE Fracture Behaviour of Bulk Metallic Glasses Cordially invites you to the on by Professor Narasimhan Ramarathnam Department of Mechanical Engineering INSTITUTE COLLOQUIUM Tea: 5-15 p.m Reception Hall Bulk Metallic Glasses (BMGs) a...
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The friction welding of Zr55Al10Ni5Cu30 bulk metallic glasses (BMG) has been tried. An apparatus for the friction welding of BMGs adopting a pneumatic cylinder and gripper based on a conventional lathe, and a welding process which provides a sufficient cooling rate after welding were devised. Friction time and friction pressure were chosen as the control parameters in the friction welding proce...
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Shear bands generally initiate strain softening and result in low ductility of metallic glasses. In this Letter, we report high-resolution electron microscope observations of shear bands in a ductile metallic glass. Strain softening caused by localized shearing was found to be effectively prevented by nanocrystallization that is in situ produced by plastic flow within the shear bands, leading t...
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ژورنال
عنوان ژورنال: Intermetallics
سال: 2011
ISSN: 0966-9795
DOI: 10.1016/j.intermet.2011.03.026