Flash Joule heating for ductilization of metallic glasses(Article)(Open Access)
- aIFW Dresden, Helmholtzstrasse 20, Dresden, 01069, Germany
- bTU Dresden, Institut Fur Werkstoffwissenschaft, Dresden, 01062, Germany
- cInstitute of Natural Sciences, Ural Federal University, Ekaterinburg, 620000, Russian Federation
- dLeibniz-Institut Fur Oberflachenmodifizierung, e. V. Permoserstrasse 15, Leipzig, 04318, Germany
- eDepartment of Chemistry-Angstrom Laboratory, Uppsala University, Box 538, Uppsala, 75121, Sweden
Abstract
Metallic glasses (MGs) inherit their amorphous structure from the liquid state, which predetermines their ability to withstand high loads approaching the theoretical limit. However, the absence of slip systems makes them very sensitive to the type of loading and extremely brittle in tension. The latter can be improved by precipitation of ductile crystals, which suppress a catastrophic propagation of shear bands in a glassy matrix. Here we report a novel approach to obtain MG-matrix composites with tensile ductility by flash Joule heating applied to Cu 47.5 Zr 47.5 Al 5 (at.%) metallic glass. This homogeneous, volumetric and controllable rapid heat treatment allows achieving uniformly distributed metastable B2 CuZr crystals in the glassy matrix. It results in a significant tensile strain of 6.8±0.5%. Moreover, optimized adjustment of the heat-treatment conditions enables tuning of microstructure to achieve desired mechanical properties.
Indexed keywords
| EMTREE drug terms: | aluminumcuprous ionzirconium |
|---|---|
| GEOBASE Subject Index: | alloyamorphous mediumbrittle mediumcrystal structureductilityenergy efficiencyglassheatingmicrostructureoptimizationprecipitation (chemistry)slipstraintensile strengthtension |
| EMTREE medical terms: | Articlecrystalflash joule heatingheat treatmentheatingmaterialsmetallic glass |
Chemicals and CAS Registry Numbers:
aluminum, 7429-90-5; zirconium, 14940-68-2, 7440-67-7
Funding details
| Funding sponsor | Funding number | Acronym |
|---|---|---|
| 05K12OD1 | ||
| Seventh Framework Programme | 340025 | FP7 |
| European Research Council | ERC | |
| Deutsche Forschungsgemeinschaft See opportunities by DFG | EC 111/26-1 | DFG |
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1
We are grateful to H. Shakur Shahabi, S. Donath, B. Opitz and O. Shuleshova for technical assistance and valuable discussions. Financial support of the German Federal Ministry of Education and Science BMBF within the framework of the Röntgen-Ångström-Cluster (Project 05K12OD1), the German Science Foundation under the Leibniz Program (Grant EC 111/26-1) and the European Research Council under the ERC Advanced grant INTELHYB (grant ERC-2013-ADG-340025) is gratefully acknowledged.
- ISSN: 20411723
- Source Type: Journal
- Original language: English
- DOI: 10.1038/ncomms8932
- Document Type: Article
- Publisher: Nature Publishing Group
Okulov, I.V.; IFW Dresden, Helmholtzstrasse 20, Dresden, Germany
© Copyright 2015 Elsevier B.V., All rights reserved.
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