Physical and mechanical properties of stir-casting processed AA2024/B4Cp composites

ÇANAKÇI A., Arslan F., VAROL T.

SCIENCE AND ENGINEERING OF COMPOSITE MATERIALS, cilt.21, sa.4, ss.505-515, 2014 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 21 Sayı: 4
  • Basım Tarihi: 2014
  • Doi Numarası: 10.1515/secm-2013-0118
  • Dergi Adı: SCIENCE AND ENGINEERING OF COMPOSITE MATERIALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.505-515
  • Anahtar Kelimeler: casting, mechanical properties, metal matrix composites (MMCs), PARTICLE-REINFORCED ALUMINUM, DRY SLIDING WEAR, TENSILE PROPERTIES, FRACTURE-BEHAVIOR, MATRIX COMPOSITES, HEAT-TREATMENT, TRIBOLOGICAL PROPERTIES, MICROSTRUCTURE, SIZE, DEFORMATION
  • Karadeniz Teknik Üniversitesi Adresli: Evet

Özet

In this study, metal matrix composites of an aluminum alloy (AA2024) and B4C particles with volume fractions 3, 5, 7, and 10 vol% and with sizes 29 and 71 m were produced using stir-casting technique. The effects of B4C particle content and size of boron carbide on the mechanical properties of the composites such as hardness, 0.2% yield strength, tensile strength, and fracture were investigated. Furthermore, the relation between particle content, microstructure, and particle distribution has been investigated. The hardness of the composites increased with increasing particle volume fraction and with decreasing particle size, although the tensile strength of the composites decreased with increasing particle volume fraction and with decreasing particle size. Scanning electron microscopic observations of the microstructures revealed that dispersion of the coarser sizes of B4C particles was more uniform while the finer particles led to agglomeration of the particles and porosity.