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Felipe Arias-González,Jesús del Val,Rafael Comesaña,Joaquín Penide,Fernando Lusquiños,Félix Quintero,Antonio Riveiro,Mohamed Boutinguiza,Francisco Javier Gil,Juan Pou 대한금속·재료학회 2018 METALS AND MATERIALS International Vol.24 No.1
In this paper, the microstructure and crystallographic texture of pure Ti thin walls generated by Additive Manufacturingbased on Laser Cladding (AMLC) are analyzed in depth. From the results obtained, it is possible to betterunderstand the AMLC process of pure titanium. The microstructure observed in the samples consists of large elongatedcolumnar prior β grains which have grown epitaxially from the substrate to the top, in parallel to the buildingdirection. Within the prior β grains, α-Ti lamellae and lamellar colonies are the result of cooling from above the β-transus temperature. This transformation follows the Burgers relationship and the result is a basket-weave microstructurewith a strong crystallographic texture. Finally, a thermal treatment is proposed to transform the microstructureof the as-deposited samples into an equiaxed microstructure of α-Ti grains.