Mechanical Properties of High Strength Aluminum Alloy Composites Reinforced by SiC Particulates

SiC 입자로 분산 강화된 고력 알루미늄 합금 복합재료의 기계적 성질

  • Lee, Eui-Gil (Dept. of Metallurgical Eng., Taejon Nat. Univ. of Technol.) ;
  • Choi, Woon (Dept. of Metallurgical & Material Sci., Hong Ik Univ.) ;
  • Nam, Seung-Eui (Dept. of Metallurgical & Material Sci., Hong Ik Univ.)
  • 이의길 (대전산업대학교 금속공학과) ;
  • 최운 (홍익대학교 금속 재료공학과) ;
  • 남승의 (홍익대학교 금속 재료공학과)
  • Published : 1997.04.20

Abstract

Mechanical properties of aluminum-matrix composites, fabricated by dispersion of fine SiC particulates of which size was less than 1 ${\mu}m$ into 2024 and 7075 aluminum alloys, have been investigated. Homogeneous mixing between the matrix and SiC particulates could be achieved by jar milling for 8 hours with appropriate processing agent. At temperatures below 473K, high-temperature tensile strength of the composites was higher than that of the 2024 and 7075 aluminum alloys which were used as matrix materials. However, tensile strength of the composites was approximated to that of the matrix materials at 573K. Thus, it could be suggested that effects of particle dispersion on tensile strength of aluminum alloys was diminished at temperatures higher than 573K.

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