Phase transformations in Zr-based bulk metallic glass cyclically loaded before plastic yielding

► Phase transformations upon cyclic loading of Zr-based bulk metallic glass. ► Kinetically frozen anelastic deformation causes crystallization of glassy phase. ► Metastable crystalline FCC Zr-based phase with lattice parameter of 415pm. ► Operation of localized areas of viscoelastic deformation. The...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2012-07, Vol.550, p.358-362
Main Authors: Churyumov, A.Yu, Bazlov, A.I., Zadorozhnyy, V.Yu, Solonin, A.N., Caron, A., Louzguine-Luzgin, D.V.
Format: Article
Language:English
Subjects:
Bulk metallic glasses
Cyclic loads
Deformation
Diffraction patterns
Glassy
Metallic glasses
Nano-crystallization
Nanostructure
Phase transformation
Phase transformations
Visco-elasticity
Zirconium
Zirconium base alloys
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Summary:► Phase transformations upon cyclic loading of Zr-based bulk metallic glass. ► Kinetically frozen anelastic deformation causes crystallization of glassy phase. ► Metastable crystalline FCC Zr-based phase with lattice parameter of 415pm. ► Operation of localized areas of viscoelastic deformation. The present work represents phase transformations observed upon cyclic loading of Zr62.5Fe5Cu22.5Al10 bulk metallic glassy samples within reversible deformation regime prior to plastic deformation. The structure of the samples was studied by X-ray diffraction and transmission electron microscopy including high-resolution imaging and analysis of selected-area electron diffraction and nanobeam diffraction patterns. Thermal properties of the samples were characterized by differential scanning calorimetry. It is found that kinetically frozen anelastic deformation accumulates at room temperature and causes crystallization of metallic glassy phase forming precursors of metastable crystalline FCC Zr-based phase stabilized by the alloying elements.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2012.04.087