Hot deformation behavior of in situ nano ZrB2 reinforced 2024Al matrixn composite

摘要

The hot deformation behavior of in situ 5 wt.% nano ZrB2/2024Al composite was studied at deformation temperatures of 350-450 degrees C and strain rates of 0.001-10 s(-1). The results show that the flow stress depends strongly on the deformation temperature and strain rate, and especially exhibits a strain hardening at high temperature and high strain rate, related to the introduction of nanoparticles (ZrB2: 15-40 nm). The kinetic equation was constituted and indicates that the key deformation me