The tensile strength of squeeze casting ZA22/Al 2O 3 short fiber composite was measured with autograph AG 10TA universal testing machines made in Japan. The experimental results were analysed with the rule of mixtu...The tensile strength of squeeze casting ZA22/Al 2O 3 short fiber composite was measured with autograph AG 10TA universal testing machines made in Japan. The experimental results were analysed with the rule of mixture(ROM) model modified by Friend. The theoretical analysis agree well with the experimental results. Under the test condition of this study, the strengthening critical fiber volume fraction predicted is 34 5%. Because fiber volume fraction in the composite is under this value, the tensile strength of the composite is lower than that of ZA22 alloy matrix.展开更多
The strengthening effect of a Zn alloy reinforced by SiC particulate was examined. Based on the results of SEM in-situ fracture observation and stress field analysis by finite element method, it is believed that the r...The strengthening effect of a Zn alloy reinforced by SiC particulate was examined. Based on the results of SEM in-situ fracture observation and stress field analysis by finite element method, it is believed that the reinforcing effect of this composite is due to the combination of strain and stress hardening in the matrix.展开更多
Al 2O 3 p /ZA22 composites were fabricated with high intensity ultrasonic treatment. The minimum diameter of reinforcement used is 0.5 μm. The microstructure and mechanical properties were studied. The result...Al 2O 3 p /ZA22 composites were fabricated with high intensity ultrasonic treatment. The minimum diameter of reinforcement used is 0.5 μm. The microstructure and mechanical properties were studied. The results show that particles disperse homogeneously with good particle/matrix interface bonding and the mechanical properties depend on the volume fraction rather than the size of reinforcement.展开更多
文摘The tensile strength of squeeze casting ZA22/Al 2O 3 short fiber composite was measured with autograph AG 10TA universal testing machines made in Japan. The experimental results were analysed with the rule of mixture(ROM) model modified by Friend. The theoretical analysis agree well with the experimental results. Under the test condition of this study, the strengthening critical fiber volume fraction predicted is 34 5%. Because fiber volume fraction in the composite is under this value, the tensile strength of the composite is lower than that of ZA22 alloy matrix.
基金This project is supported by the National Natural Science Foundation of China(No.59971017).
文摘The strengthening effect of a Zn alloy reinforced by SiC particulate was examined. Based on the results of SEM in-situ fracture observation and stress field analysis by finite element method, it is believed that the reinforcing effect of this composite is due to the combination of strain and stress hardening in the matrix.
文摘Al 2O 3 p /ZA22 composites were fabricated with high intensity ultrasonic treatment. The minimum diameter of reinforcement used is 0.5 μm. The microstructure and mechanical properties were studied. The results show that particles disperse homogeneously with good particle/matrix interface bonding and the mechanical properties depend on the volume fraction rather than the size of reinforcement.
