Effect of Nano-Sized TiC-TiB2 on Microstructure and Properties of Twin-Roll Cast Al-Cu-Mn-Zr Alloy

Al-5Cu-0.8Mn-0.1Zr strips produced during a twin-roll-casting process are investigated in this paper. Central segregation does occur the alloy strip, and is mixture of Al2Cu Al20Cu2Mn3 eutectic phases. This difficult to be dissolved solid solution heat treatment. In paper, nano-sized TiC/TiB2 particles introduced twin-roll-casting. It was found that after adding 0.3% TiC-TiB2 particles, composition distribution becomes more uniform, central eliminated, compared strip without nanoparticles. The tensile strength T6-treated increases from 350 MPa 390 when nanoparticles added, goal increasing properties twin-roll-cast Al-Cu-Mn-Zr has been achieved.