Experimental Research on Producing Nanostructured Materials by Machining Al6061-T6 with Large Strain

The method of machining Al6061-T6 with large strain to produce nano-materials was introduced, and the influence of cutting parameters on the microstructure was studied. The shear strain of chip which is important to the microstructure was analyzed theoretically and simulated by finite element. Bright-field TEM images and SAD patterns were obtained and used to study the microstructure of the chip. The result shows that, the shear strain of the chip worked by simplified formula is similar to the result of finite element simulation. The size of the grain of chip is reduced when the shear strain increased and the fine grain less than 100nm can be obtained when the shear strain is large enough.