Parameter optimization of contact solid solution process for 7075 aluminum alloy
To explore the effect of experimental parameters on the properties of 7075 aluminum alloy formed parts in the contact solid so-lution process,7075-T6 aluminum alloy sheet material was taken as the research object,firstly,the contact solid solution forming experi-ments were carried out to obtain the formed parts with different experimental parameters and to measure the properties respectively.Then,the effects of contact solution temperature,solid solution time and contact pressure on Rockwell hardness,tensile strength and elongation after fracture of parts were analyzed by response surface method.Based on experimental data,the genetic algorithm was used for multi-ob-jective optimization to obtain process parameters that meet the requirements of multiple performance,then the optimization solution that meets the requirements was determined.The results show that the optimal solution that ensures multiple comprehensive performance can be obtained at contact solution temperature of 475℃,solid solution time of 32 s and contact pressure of 13 MPa.
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