Finite element analysis of microimprinting of bulk metallic glasses in supercooled liquid regime
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A finite element analysis (FEA) model to analyze imprint of a bulk metallic glass (BMG) in the temperature range near the glass transition temperature (Tg) has been developed. The material model includes both Newtonian and non-Newtonian flow behavior. The results reveal that the topology of the imprinted surface depends strongly on temperatures, but only mildly on surface feature scale. As a result of the flow characteristics of BMG in the temperature range above Tg, the lubrication condition has only a slight effect on BMG imprinting.
KeywordsFriction Coefficient Bulk Metallic Glass Corner Radius Newtonian Flow Groove Geometry
The authors express sincere appreciation to the DANIDA Fellowship Program for financial support during the course of this work. We are grateful to N. Pryds for experimental assistance; to A. Schrøder Pedersen, M. Eldrup, Erik Johnson for thoughtful comments.
- 9.Wert JA, Pryds NH, Zhang E (2001) In: Dinesen AR, Eldrup M, Juul Jensen D, Linderoth S, Pederson TB, Schrøder Pederson A, Wert JA (eds) Proceedings of the 22nd Risø International Symposium on Materials Science, Risø (DK), September 2001, p 423Google Scholar