Fracture Description of AZ61 Mg-Al2O3 Materials Studied by 'In Situ Tensile Test in SEM'
| Autor: | Oksana Velgosová, Song-Jeng Huang, Michael Besterci, Priit Kulu, Katarína Sülleiová, Štefan Nagy |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Mechanical Engineering Alloy Intermetallic 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Mechanics of Materials 0103 physical sciences Ultimate tensile strength Fracture (geology) engineering General Materials Science Deformation (engineering) Composite material 0210 nano-technology Mass fraction Tensile testing |
| Zdroj: | Key Engineering Materials. 674:165-172 |
| ISSN: | 1662-9795 |
| DOI: | 10.4028/www.scientific.net/kem.674.165 |
| Popis: | In situ observation of AZ61 Mg alloy with 5 wt. % of Al2O3 in the SEM was performed to study influence of the weight fraction of Al2O3 particles on the deformation and fracture description during the tensile test. Structure of the experimental materials was also analysed; microstructures were heterogeneous, with randomly distributed globular Al2O3 particles (average diameter of 25 nm) and Mg17Al12 intermetallic phase (average diameter of 0.4 mm). It was shown that during the tensile deformation the failure of Mg17Al12 particles and decohesion of the matrix-Al2O3 particles interphase boundary started simultaneously. Decohesion resulted from the different physical properties of matrix and Al2O3 particles. The influence of the Al2O3 weight fraction on the final fracture was evident; for the material with 5 wt. % of Al2O3, the fracture surface was approximately perpendicular to the loading direction. The fracture surface had transcrystalline ductile character. |
| Databáze: | OpenAIRE |
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