Microstructure and Mechanical Properties of 4043 Aluminum Alloy Prepared by Wire Arc Additive Manufacturing
In order to study the law between process parameters,structure and mechanical properties during 4043 aluminum alloy arc additive manufacturing,4043 aluminum alloy thin wall specimens were prepared by CMT arc additive manufacturing technology.The microstructure and properties of 4043 aluminum alloy sepecimen prepared by diffferent process parameters(welding speed and wire feeding speed)were studied by metallographic microscope,scanning electron microscope and electronic universal tester.The results show that the microstructure of WAAM 4043 aluminum alloy is α(Al)phase and β(Al3.21Si0.47)phase.As the welding heat input increases,the Al-Si eutectic phase increases,and the β phase at the grain boundary becomes coarse and loose,and the crystal grains become coarse.The maximum tensile strength of 4043 thin wall part is 153.7 MPa,and the maximum elongation is 22.5%.The tensile properties are anisotropic in the transverse and vertical directions.Too large or too small welding heat input is not conducive to obtaining good mechanical properties.
wire arc additive manufacturing(WAAM)cold metal transfer(CMT)4043 aluminum alloy
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