Casting fluidity, viscosity, microstructure and tensile properties of aluminum matrix composites with different Mg2Si contents


VATANKHAH BARENJI R.

RARE METALS, cilt.41, sa.8, ss.2767-2776, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 41 Sayı: 8
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1007/s12598-017-0923-8
  • Dergi Adı: RARE METALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Chemical Abstracts Core, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.2767-2776
  • Anahtar Kelimeler: Al-Mg2Si, Microstructure, Fluidity, Tensile behavior, Porosity, SIZED SIC PARTICLES, MECHANICAL-PROPERTIES, RHEOLOGICAL BEHAVIOR, ALLOYS, FABRICATION, ACTIVATION, SLURRIES, FRACTURE, FE
  • Hacettepe Üniversitesi Adresli: Evet

Özet

The effect of Mg2Si amount on the properties of Al-Mg2Si as-cast composites was investigated in this study. Composites with different amounts of Mg2Si (15 wt%, 20 wt% and 25 wt%) were fabricated, and the fluidity, viscosity, porosity formation and tensile properties were then analyzed. In addition, optical microscope and scanning electron microscope were used for microstructural studies and fractography. The results reveal that with the amount of Mg2Si increasing, the morphology of the primary Mg2Si becomes irregular, the size of primary Mg2Si increases, fluidity decreases, viscosity increases, and porosity amount increases. The reason for the higher amounts of porosities is the lower fluidity and higher viscosity. In addition, Al-15% Mg2Si shows better tensile properties and higher quality index compared to other composites. Furthermore, the fracture surface of the composite with lower Mg2Si amount reveals more ductile mode than those with higher Mg2Si amount.