Preparation Of 6061 Bend Aluminum Wire Metal Porous Material And Study On Compression Deformation

Because the three-dimensional through-space pore composite material in which metal fibers / wires form pores is what we call metal fiber / wire porous materials,its biggest feature is that it has more unique pore structures and has mechanical properties,especially with high strength.The cost and defects are relatively small,and the porous material made of very easy-to-use metal wire as a raw material has vital research and development value in application.For example,among metal wire porous materials,although three-dimensional braided and wound wire porous materials have high strength,which can ensure the realization of integrated structural functions,if they are used in impact resistance,vibration reduction and energy absorption,etc.Application,but still can not be used directly as the main structure of the bearing.In order to prepare a mass-producible material with easy-to-obtain raw materials,and the preparation process is relatively easy to produce a light-weight rigid and high-strength vibration-absorbing wire porous material,the research topic of this paper is on the existing basis This paper discusses a new type of porous metal material made by bending wire.Using the experiment of static mechanics,it conducts an in-depth study on the mechanical structure and mechanical behavior of porous metal material,and develops a manufacturing method of this new type of porous metal material.This paper mainly introduces the process of preparing porous metal material with new bending wire.The spring machine chopped 6061 aluminum alloy wire to obtain short side length between 5 ? 10 mm and long side length between 10 ? 15 mm.The arc diameter is 2 mm,the wire diameter is 0.15 mm and 0.20 mm,and the new shape of the bending wire different from the previous is used as the raw material for reprocessing,and then the cold wire forming method is used to make the basic material of the bending wire porous material The solid body is sintered in a vacuum and high temperature environment to obtain a new type of porous porous material with a porosity between 60 and 80%.The structure of this material presents the characteristics of random distribution of holes and three-dimensional three-dimensional composite penetration.The bending wire can be easily mass-produced,which provides more raw material reserves for reducing the cost and mass-producing the porous wire material.The effects of preparation process parameters(wire diameter,structure size)and sintering process parameters(sintering temperature,sintering time)on the pore size distribution of porous materials were studied by gas replacement method.The quasi-static uniaxial compression test was used to study the mechanical behavior and properties of the bent wire metal porous material,and to explore the mechanical behavior of the preparation process parameters(wire diameter,structure size),sintering process parameters(sintering temperature,sintering time)and porosity with performance impact.Under the same porosity,the finer the wire diameter and the smaller the structural size,the denser the wire skeleton per unit volume of the porous material,the narrower the pore size distribution range and the smaller the average pore diameter.However,the influence of the preparation process parameters on the compression performance is not very sensitive,and the difference is not obvious.Increased sintering temperature and extended sintering time promote the growth and rebirth of sintering neck in porous materials and the average pore size is reduced,and the pore size distribution is more concentrated and uniform.However,the sintering process parameters are the same as the preparation process parameters,and the impact on the compressive properties of the material is not significant.In contrast,the change of porosity has a regular effect on the compression performance of 6061 bent aluminum wire porous material,that is,as the porosity decreases,the compressive strength of the bent wire metal porous material increases significantly.The data obtained from the quasi-static compression test of the bent wire metal porous material samples with different porosities prove that the material exhibits a very typical three-stage stress to strain behavior change,that is,from the initial nonlinear elastic deformation The stage gradually shifts to the pseudo-platform stage and the densification stage.The modulus of elasticity and the strength of the compression yield all decrease with the increasing porosity of the bending wire metal porous material;and there is basically a certain constitutive relationship between the porosity and the yield strength.Under the same strain condition,the energy absorption capacity of the bending wire metal porous material decreases with increasing porosity.The energy absorption efficiency increases with the gradual increase of the dependent variable and thendecreases.The peak value also decreases with the increase of the porosity,but the peak process strain also increases with the porosity.Large and continue to increase.Through the compression deformation process,it can be found that the volume of the sample changes when the bending wire metal porous material is compressed and deformed.By fitting the compression experimental data,it is obtained that the strain during compression deformation and the sample volume conform to a certain constitutive relationship.