Research Progress of Electron Beam Selective Melting Additive Manufacturing Metal Materials
Electron beam selective melting additive manufacturing technology has the characteristics of high energy density,low reflection rate,high efficiency,high density and low residual stress.Forming in a high vacuum atmosphere can prevent metal materials from being oxidized,and it is especially suitable for the precision forming of high-performance complex metal material parts with high activity,refractory and brittleness.However,the electron beam additive manufacturing of metal materials often faces problems such as difficult control of process parameters,pore,crack defects in formed parts,low density,element evaporation and insufficient mechanical properties.Therefore,it is necessary to explore and study the relationship between electron beam additive manufacturing process-formability-structure-performance and its internal mechanism.The regulation and optimization of process parameters,microstructure evolution and mechanical properties of alloy steel,titanium and superalloy,aluminum alloy and high entropy alloy prepared by electron beam selective melting forming technology were briefly reviewed.Finally,the future research hotspots and development directions of the electron beam additive metal materials were prospected.
electron beam selective meltingadditive manufacturingmetal materials
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