Abstract
Investigated the effect of Si dispersion on machinability of Al-Cu alloys, it was clarified that there was little influence of Si dispersion to machinability at dry cutting, however the chip breaking of Al-Cu alloys was improved remarkably by using cutting fluids. In this research, turning test for various wrought products (A 1050, A2017, A5056, A6061, A7075)was carried out to investigate whether the tendency which appeared in Al-Cu-Si alloys would be also appeared in aluminum alloys on the market, and it was clarified the cause of chip breaking of aluminum alloys.
