Numerical Simulation And Experimental Study On Hydrostatic Extrusion Of Aluminum Tungsten Alloy

Aluminum tungsten alloy is a new development special aluminum alloy new structural material.It possesses the characteristics of high temperature resistance and wear resistance of tungsten,and light weight,oxidation resistance,and good processability of aluminum,is a promising special lightweight high-strength alloy material.However,there are no reports about the plastic forming of aluminum tungsten alloys in the literature at home and abroad,which restricts the aluminum tungsten alloy industrialization application in some ways.Hydrostatic extrusion is a new extrusion method.Compared with traditional extrusion technology,its products have low surface roughness,extremely uniform deformation,and uniform mechanical properties in both cross-section and length.In order to establish the hydrostatic extrusion process of aluminum tungsten alloy,a combination of numerical simulation and physical experiment was used to study the hydrostatic extrusion process of aluminum tungsten alloy.Firstly,the aluminum tungsten alloy specimen was thermocompressed on a Gleeble-1500 D dynamic thermal simulation tester,and the constitutive equation of the aluminum tungsten alloy was established based on the Zener-Hollomon parameter.Secondly,establishing a material mechanics model in Deform-3D software,and simulating the extrusion process of aluminum tungsten alloy under different extrusion parameters,the equivalent stress distribution,equivalent strain distribution and load change law were analyzed,and the influence of different process parameters on the results was compared to obtain a preliminary process plan.On this basis,physical experiment was carried out,and obtaining extruded bars with better surface quality,which verify the feasibility of solution.Finally,an electronic universal bending tester was used to test its mechanical properties,andthe microstructure was observed by using a metallographic microscope.The results show that the comprehensive mechanical properties and structure properties of the material were improved after the hydrostatic extrusion.This topic through the numerical simulation of the hydrostatic extrusion process in aluminum tungsten alloy and analysis of physical experiment results,perfecting and establishing the aluminum tungsten alloy's hydrostatic extrusion process program,thus laying a good foundation for the industrial application of aluminum tungsten alloy.