Tensile strength analysis on δ-Al_2O_3 short fiber reinforced Al-12Si alloy composites

摘要

Al-12Si, Al-12Si-Cu and Al-12Si-Mg matrix composites reinforced with δ-Al_2O_3 short fibres were fabricated by using squeeze-casting. The three composites' room temperature tensile strengths were ana- lyzed by linear regression method (LRM). Their prediction equations for ρ_min, ρ_c and σ'_M were worked out accurately. The relationship between σ_m and σ_um was discussed in detail. The results showed that the rein- forcing effect of composite decreases with increasing σ'_m, and σ'_m and σ'm/σ'_m increase with increasing matrix strength so that the higher the strength of the matrix is, the lower the reinforcing effect of composite is.