Influence of as-cast spherulites on the fracture toughness of a Zr55Cu30Al10Ni5 bulk metallic glass
| Autor: | A. Magueresse, Yoshihiko Yokoyama, Vincent Keryvin, Véronique Doquet, Cédric Bernard, S. Hin |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Amorphous metal Mechanical Engineering Fractography Fracture mechanics 02 engineering and technology Bending 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Fracture toughness Mechanics of Materials 0103 physical sciences Volume fraction Glassy matrix Fracture (geology) General Materials Science Composite material 0210 nano-technology |
| Zdroj: | Materials Science and Engineering: A. :137-147 |
| ISSN: | 0921-5093 |
| DOI: | 10.1016/j.msea.2018.10.061 |
| Popis: | This study addresses the influence of as-cast spherulites, which may be present in the glassy matrix of a bulk metallic glass owing to the processing conditions, on its fracture behaviour. The fracture toughness of a Zr 55 Cu 30 Al 10 Ni 5 glass containing a low fraction as-cast spherulites ( ∼ 1 % volume fraction) is investigated by means of bending tests. The resulting mode-I fracture toughness values, around 72 MPa m , reveal the moderate detrimental effect of the spherulites. This result is compared to previous results for flawless and dendrite-containing glasses of the same composition, as well as with results from literature. The role played by the spherulites in crack propagation, under mode I and II, and fracture is finally addressed by means of fractography observations and finite element computations. |
| Databáze: | OpenAIRE |
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