Effects of SiC Cluster on Mechanical Properties of the 2024A1/$SiC_p$ Composites

2024A1/$SiC_p$복합재료의 기계적특성에 미치는 SiC클러스터의 영향

  • 김홍물 (한국원자력연구소 원자력재료기술개발팀) ;
  • 천병선 (충남대학교 공과대학 금속공학과)
  • Published : 2001.06.01

Abstract

A centrifugally atomized 2024A1/SiC/sub p/ composites were extruded to study effect of clusters on mechanical properties, and a model was proposed that the strength of MMCs would be estimated from the load transfer model approach that taken into consideration of the clusters. This model has been successfully utilized to predict the strength and fracture toughness of MMCs. The experimental and calculated results show coincidence and that the fracture toughness decreases with increasing the volume fraction of particles. On the basis of experimental observations, we suggest that the strength and fracture toughness of particle reinforced MMCs may be calculated from; σ/sub y/=σ/sub m/V/sub m/+σ/sub r/(V/sub r/-V/sub c)-σ/sub r/V/sub c/, K/sub IQ/=σ/sub Y/((3πt)((r/sub r//V/sub r/)(r/sub c//V/sub c/))/sup 1/2/)/sup 1/2/, respectively.

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