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Formability of direct laser deposited Ti-1023 alloys was revealed through investigating the pore defects,microstructure and tensile properties.The results show that gas pores and local non-fusion are two typical defects in the Ti-1023 alloy deposits.Gas pores are spherical and exist randomly in the deposited layers.Non-fusion defects present irregular and lie in adjacent layer-layer and pass-pass boundaries.The layer boundary effects are gradually weakening from the bottom to the top of the single pass deposits.The microstructure of the single pass deposits and multiple pass built block consists of equiaxed grains.Moreover,the tensile properties of as-deposited Ti-1023 alloys are equal to the as-forged tensile corresponding values.Through optimizing the laser rapid forming parameters,the non-fusion defects can be eliminated and the dense Ti-1023 parts are obtained.
Formability of direct laser deposited Ti-1023 alloys was revealed through investigating the pore defects, microstructure and tensile properties. These results show that gas pores and local non-fusion are two typical defects in the Ti-1023 alloy deposits. Gas pores are spherical and exist randomly in the deposited layers. Non-fusion defects present irregular and lie in adjacent layer-layer and pass-pass boundaries. The layer boundary effects are gradually weakening from the bottom to the top of the single pass deposits.. The microstructure of the single pass deposits and multiple pass built blocks consist of equiaxed grains. Moreover, the tensile properties of as-deposited Ti-1023 alloys are equal to the as-forged for tensile corresponding values. Through optimization of the laser rapid forming parameters, the non-fusion defects can be eliminated and the dense Ti-1023 parts are obtained.