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2016 | 129 | 1 | 138-141
Article title

Influence of Al₂O₃ Particles Weight Fraction on Fracture Mechanism of AZ61 Mg-Al₂O₃ System Studied by In Situ Tensile Test in SEM

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Abstracts
EN
In situ observation of AZ61 Mg alloy with 1 and 5 wt% of Al₂O₃ in the scanning electron microscopy was performed to study influence of the weight fraction of Al₂O₃ particles on the deformation and fracture mechanism during 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 μ m). It was shown that during 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 material with 5 wt% of Al₂O₃, the fracture surface was approximately perpendicular to the loading direction and for material with 1 wt% of Al₂O₃ was at 45° angle. Fracture surface had transcrystalline ductile character.
Keywords
EN
Contributors
author
  • Institute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovakia
author
  • Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Račianska 75, 831 02 Bratislava, Slovakia
  • Institute of Materials Science, Faculty of Material Sciences and Technology in Trnava, Slovak University of Technology in Bratislava, Slovakia
author
  • National Taiwan University of Science and Technology, Department of Mechanical Engineering, 43, Sec. 4, Keelung Rd., 106 Taipei, Taiwan, R.O.C.
author
  • Department of Materials Science, Faculty of Metallurgy, Technical University in Košice, Park Komenského 11, 042 00 Košice, Slovakia
  • Institute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovakia
author
  • National Taiwan University of Science and Technology, Department of Mechanical Engineering, 43, Sec. 4, Keelung Rd., 106 Taipei, Taiwan, R.O.C.
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv129n127kz
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