BBD Modeling and Optimization Prediction of Mechanical Properties of 1050 H12 Aluminum Alloy
The Box-Behnken design(BBD)test method,a spherical design method conforming to rotation,was adopted to systematically design the tensile test parameters of 1050 H12 aluminum alloy,including testing rate,testing temperature and holding time,and then obtained the relationship between tensile test parameters and tensile strength and elongation after fracture of 1050 H12 aluminum alloy,at the same time,combined with the mechanical test results(tensile strength,percentage elongation after fracture),a reliable mathematical model with the highest merits of r12=0.999 1 and r22=0.994 8,and P values(Prob>F)both levels less than 0.000 1,respectively,was obtained.The model and analysis of variance,the loss of fit terms of the tensile strength model and percentage elongation after fracture model respectively are 0.077 and 0.117(both greater than 0.05),and the loss of fit tests are not significant,which fully reflects the small error of the model test.So it can be used to accurately analyze and predict the relationship between the test temperature,holding time,tensile rate and tensile strength and percentage elongation after fracture.The influence degree of the three tensile process parameters on the tensile strength and percentage elongation after fracture of 1050 H12 aluminum alloy in the test design from large to small is as follows:temperature,tensile strength and holding time,and it can be seen that the tensile strength and percentage elongation after fracture of 1050 H12 aluminum alloy are extremely sensitive to the test temperature and are negatively correlated with the test temperature and holding time,that is,1050 H12 aluminum alloy will be strengthened and toughened at low temperature.According to the accurate prediction of response surface model,when the testing temperature is-30℃,the holding time is 14 min,and the testing rate is 9 mm∙min-1,the tensile strength and percentage elongation after fracture of 1050 H12 aluminum alloy will peak within the range of tensile parameters in this study.
1050 H12 aluminumlow temperatureresponse surfacetensile strengthpercentage elongation after fractureanalysis of variancetesting rateBox-Behnken design
万方数据
维普
