Relating activation of brittle-to-ductile transition to β relaxation in Cu46Zr44Al7Y3 metallic glass
| Autor: | Qingfeng Li, Y.L. Ren, Wei Zhang, Yue Zhang, Qingchun Xiang, K.Q. Qiu |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Arrhenius equation Amorphous metal Materials science Strain (chemistry) Thermodynamics 02 engineering and technology Atmospheric temperature range 021001 nanoscience & nanotechnology Condensed Matter Physics Compression (physics) 01 natural sciences Electronic Optical and Magnetic Materials Shear (sheet metal) symbols.namesake Brittleness 0103 physical sciences Materials Chemistry Ceramics and Composites symbols Relaxation (physics) 0210 nano-technology |
| Zdroj: | Journal of Non-Crystalline Solids. 544:120189 |
| ISSN: | 0022-3093 |
| DOI: | 10.1016/j.jnoncrysol.2020.120189 |
| Popis: | A series of compression tests were performed on the Cu46Zr44Al7Y3 metallic glass (MG) at different strain rates and a wide temperature range in which the β relaxation can be observed. A distinct boundary that can be used to describe the brittle-to-ductile transition (BDT) of the MG in compression was summarized. Furthermore, it was found that both the BDT and the β relaxation are in accordance with the Arrhenius relations, by which two energies with similar values reflecting the apparent activation energies of the BDT and the β relaxation are determined, respectively. Therefore, the BDT and the β relaxation are co-related. In addition, the origin of BDT was discussed in terms of the intrinsic correlation among the potential shear transition zones, the β relaxation, and the inhomogeneous atomic structure in MGs. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect