PROCESS OPTIMIZATION AND EFFECT OF POST-PROCESSING ON MECHANICAL PROPERTIES IN THE PRODUCTION OF Ti6A14V ALLOY BY LASER METAL DEPOSITION METHOD

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Ari A., Karagoz T., Bayram A.

ARCHIVES OF METALLURGY AND MATERIALS, cilt.70, sa.4, ss.1983-2001, 2025 (SCI-Expanded, Scopus)

Özet

This study investigates the production and optimization of Ti6Al4V alloy, which is widely used in the aviation sector, by the laser metal deposition method. Despite the advantages of Ti6Al4V, such as high strength, low weight, and corrosion resistance, its production by laser metal deposition method is challenging due to the requirement of a controlled environment. The study examined the geometric structures and porosity values of the samples produced using 12 different process parameters. The number of experiments was reduced, and the most effective parameters were determined using the response surface method and ANOVA. The lower, middle, and upper regions of the test samples produced with optimum parameters were examined separately, and it was determined that the lower regions showed higher strength. It was observed that the Hot Isostatic Pressing and heat treatment applied to the produced samples reduced the strength values but significantly improved ductility and reduced the porosity. In addition, cryogenic heat treatment was applied to the Hot Isostatic Pressing-treated samples to further increase mechanical performance. This process facilitated the completion of martensitic transformation and led to finer and more homogeneous precipitation of carbides while decreasing the porosity ratio and increasing the elongation at break. This study aims to develop the potential of this advanced manufacturing technique in the aerospace sector by comprehensively addressing the effects of process optimization and post-processing in the production of Ti6Al4V by the laser metal deposition method.