Research progress on directed energy deposited titanium alloy with auxiliary field
Titanium alloys have been widely used in many fields such as aerospace,automobile biomedical due to their high strength,low density and high fracture toughness.Previously,the final shape and size of titanium parts are determined by conventional procedure,including forging/casting and subsequent machining,but it is difficult to fabricate titanium alloy parts with a complex shape,which results in a large amount of material waste.Direct energy deposition(DED)has provided an efficient way for preparing titanium alloy parts,but there are also some critical issues to be solved,such as coarse columnar grains,defects and the resulting anisotropy of mechanical properties.In order to solve the above problems,the auxiliary fields are introduced into the processing of direct energy deposition.This paper first provided a brief introduction to several auxiliary fields,such as deformation field,acoustic field,magnetic field,then the effects of auxiliary fields on the microstructure and mechanical properties of directed energy deposited titanium alloys were summarized and reviewed.Finally,the development trends of titanium alloys manufactured by directed energy deposition with an auxiliary field were proposed.
direct energy depositiontitanium alloymicrostructuremechanical propertyauxiliary field
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