A study on chip and microstructure of 7055 aluminum alloy's 3D HSC based on FEM and experiment

In this paper,a 3D high speed cutting model is then built, and finite-element analysis is carried out based on DEFORM-3D and the J-C constitutive equation satisfying the “three-high features”. Simulation results show that the chip temperature has obvious positive correlation with the cutting speed: the greater the cutting speed is, the higher the chip temperature gets. The cutting speed show obvious positive correlation with the wearing depth of tool at a steady state during cutting; the greater the cutting speed is, the greater the wearing depth of tool gets, and the greater the change rate of wearing depth gets. The cutting speed show obvious negative correlation with the wearing depth of tool at a steady state during cutting; the greater the cutting speed is, the smaller the wearing depth of tool gets. The average grain size is negatively correlated with the cutting speed. When the cutting speed is at 50 m/min and 100 m/min, there is no obvious dynamic recrystallization; when the cutting speed is at 150 m/min, dynamic recrystallization occurs. When the cutting speed is 100 m/min, there are dislocation walls in the center of the specimen, and there is dynamic recrystallization grain in the dislocation wall. Cube, Goss, {023} <100>(2.5°, 35°, 0°) and {032} <100> (2.5°, 55°, 0°) textures exist under all cutting speeds with cube texture prevailing over the other three forms. When the cutting speed increases to 150 m/min, in addition to all the forms of texture present under the cutting speed of 50 m/min, small amounts of, though fairly weak, {212}< 423 > (82°, 47°, 65°), {210}<001>(90°, 87°, 65°), {213}< 112 >(145°, 40°, 65°) and E are also detected, displaying a discrete texture distribution.