Technological Studies On Preparation By The Means Of MFT And Fe Simulation Of Compression Performance

Foamed aluminum (FA) is a new structure/function integrating material, and has abroad application field. The purpose of this paper is the preparation of FA sample withbasically controllable pore structure and uniform distributed pore by melt foaming process(MFT) improvement and system researches. Meanwhile, this paper establishes a3D model,which is closer to the real foamed metals structure. On this foundation, has carried on thecompressive property of FA by Finite Element Simulation. Main research contentsdemonstrate as follows:Firstly, on the basis of brief introduction to the principle of MFT, large number ofexperiments and defects analysis was carried out. By foaming agent pretreatment, addingmagnesium powder and the change in cooling conditions on the melt foaming preparationof FA technology to improve, orthogonal testing method is used to systematically analyzethe effect of stirring time and the addition quantity of foaming agent, thickening agent andmagnesium powder on the porosity, average pore size and bore diameter standarddeviation of FA. The optimal preparation technology of FA is obtained, and the FAsamples with uniform pore size are prepared;Subsequently, based on the previous introducing and analyzing the advantages anddisadvantages of FA models,2D Voronoi model,3D Voronoi model and3D randomsphere model with adjustable pore wall structure are established. And the porosity, poresize range and minimum wall thickness of the3D random sphere model which isgenerated by using the C language program are adjustable, which is more conform to thestructure of FA compared with the previous model;Finally, the FA samples compression experiment is conducted with different porosity,and the compression performance is analyzed. According to the experimental results, therelationship of density ratios and elastic module of the FA samples is fitted. Using3Drandom sphere model, the FA models with different porosity are generated. By the finiteelement analysis software of ABAQUS, the compressive property of FA samples issimulated and analyzed. Simulation and experimental results show. The comparison of simulation and experimental results shows that error of elastic module is less than15%.