Correlation between fracture surface morphology and toughness in Zr-based bulk metallic glasses
| Autor: | Marios D. Demetriou, Jin-Yoo Suh, R. Dale Conner, William L. Johnson, C. Paul Kim |
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| Rok vydání: | 2010 |
| Předmět: |
Toughness
Amorphous metal Materials science Scanning electron microscope Mechanical Engineering Fracture mechanics Surface finish Condensed Matter Physics Shear (sheet metal) Fracture toughness stomatognathic system Mechanics of Materials Fracture (geology) General Materials Science Composite material |
| Zdroj: | Journal of Materials Research. 25:982-990 |
| ISSN: | 2044-5326 0884-2914 |
| Popis: | Fracture surfaces of Zr-based bulk metallic glasses of various compositions tested in the as-cast and annealed conditions were analyzed using scanning electron microscopy. The tougher samples have shown highly jagged patterns at the beginning stage of crack propagation, and the length and roughness of this jagged pattern correlate well with the measured fracture toughness values. These jagged patterns, the main source of energy dissipation in the sample, are attributed to the formation of shear bands inside the sample. This observation provides strong evidence of significant “plastic zone” screening at the crack tip. |
| Databáze: | OpenAIRE |
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