Comparative analysis of thermal deformation models of 1060Al/Al-Al2O3/1060Al laminated aluminum matrix composite
Isothermal compression tests were conducted on 1060Al/Al-Al2O3/1060Al laminated aluminum matrix composites using Gleeble-3500 thermal simulator to study the thermal deformation behavior at deformation temperatures of 25-400 ℃,strain rates of 0.01-10 s-1 and true strain of 0.85.Three constitutive models of strain-compensated Arrhenius(SCA),modified Johnson-Cook(MJC)and modified Zerilli-Armstrong(MZA)were developed to compare the predicted flow stress with the experimental values.The results indicate that the flow stress of the laminated composites is work-hardening type and decreases with the increase of temperature or the decrease of strain rate.The interlayer deformation of the laminated composite components is more coordinated under the condition of 100 ℃/O.5 s-1,200 ℃/0.1 s-1 and 300 ℃/0.1 s-1.Among the three constitutive models,the correlation coefficient of the MZA model is the highest with R of 0.99085 and the average absolute relative error is the lowest with eAARE of 0.046966,which is more suitable for describing the ther-mal deformation behavior of 1060Al/Al-Al2O3/1060Al laminated aluminum matrix composites.
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