Cryogenic-temperature-induced structural transformation of a metallic glass
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Authors
Organisational units
External Organisational units
- Shanghai University, School of Materials Science and Engineering, Institute of Materials
- University of Hong Kong
- Leibniz Institute for Solid State and Materials Research, Dresden
- Photon Science, Deutsches Elektronen-Synchrotron DESY, Hamburg,
- Erich Schmid Institute of Materials Science
Abstract
The plasticity of metallic glasses depends largely on the atomic-scale structure. However, the details of the atomic-scale structure, which are responsible for their properties, remain to be clarified. In this study, in-situ high-energy synchrotron X-ray diffraction and strain-rate jump compression tests at different cryogenic temperatures were carried out. We show that the activation volume of flow units linearly depends on temperature in the non-serrated flow regime. A plausible atomic deformation mechanism is proposed, considering that the activated flow units mediating the plastic flow originate from the medium-range order and transit to the short-range order with decreasing temperature.
Details
Original language | English |
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Pages (from-to) | 284-291 |
Number of pages | 8 |
Journal | Materials Research Letters [Elektronische Ressource] |
Volume | 5.2017 |
Issue number | 4 |
DOIs | |
Publication status | E-pub ahead of print - 30 Nov 2016 |