Significant room-temperature plasticity in a high Zr-containing bulk glassy alloy
| Autor: | Dong Xing, Feng Liu, Xida Deng, Peidi Song, Jiahua Zou, Shuangshuang Chen |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Mechanical Engineering Modulus 02 engineering and technology Plasticity 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Casting Fragility Flexural strength Mechanics of Materials 0103 physical sciences General Materials Science Chemical stability Thermal stability Composite material 0210 nano-technology Ductility |
| Zdroj: | Journal of Materials Research. 35:1590-1597 |
| ISSN: | 2044-5326 0884-2914 |
| DOI: | 10.1557/jmr.2020.94 |
| Popis: | In this study, the glass forming ability, thermal stability, and room-temperature mechanical behavior of a high Zr-containing Zr71Cu11Ni10.5Al7Ti0.5 bulk glassy alloy were investigated. The glassy alloy exhibits a high glass-forming ability with a critical casting diameter of 5 mm using copper mold injection casting, and its critical cooling rate is estimated to be smaller than 40 K/s. A small kinetic fragility index m of 32 indicates its good thermodynamic stability and glass-forming ability. Compressive tests indicate that the glassy alloy displays a significant average plastic strain of 12.3%, a high fracture strength of 1592 MPa, and Young’s modulus of 74.5 GPa. The good ductility is attributed to the introduction of more free volume and local compositional inhomogeneity with increasing Zr addition. This finding may provide useful guidelines for the development of novel high Zr-containing glassy alloys. |
| Databáze: | OpenAIRE |
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