Abstract
To make clear the relationship between machinability of aluminum alloys and adhesion on tool face, some annealed aluminum alloys has been machined at dry cutting using lathe under condition to cause adhesion on cutting tool more remakably. As a result, it was found that the surface roughness of longitudinal direction on work is controlled by both adhesion on rake face and on back rake face of tool. And, the surface roughness of transverse direction on work increased with increasing the adhesion on bake rake face of tool. Moreover, machined chip increased remarkably when fracture energy is more than 50 kJ/m^3.
