Journal
SCRIPTA MATERIALIA
Volume 137, Issue -, Pages 127-131Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2017.02.038
Keywords
Thermoplastic net-shaping; Glass-forming ability; Formability kinetics; Thermophysical properties; Supercooled liquid fragility
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Funding
- European Research Council under the Advanced Grant INTELHYB - Next Generation of Complex Metallic Materials in Intelligent Hybrid Structures [ERC-2013-ADG-340025]
- European Commission in the 7th FP MC-ITN VitriMetTech [607080]
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The formability difference between good and marginal glass-forming systems is investigated by micro-surface patterning of hierarchical features using thermoplastic net-shaping (TPN). For each alloy, a remarkable change in the flow behaviour is observed as the applied force along with the pressing time and temperature are optimized. The flow kinetics of glassy alloys with different glass-forming abilities is best described by the formability parameter S, which is defined by the ratio of the width of the supercooled to undercooled liquid region (T-1 - T-g)/(T-x - T-g). Reproducible micro-engineered surfaces with high uniformity can be established by controlled TPN processing. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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