Mina Bakhshi
Optimization and Microstructural Investigation of In-situ Fe-alloyed Ti6Al4V Fabricated by Laser Powder Bed Fusion method.
Rel. Abdollah Saboori. Politecnico di Torino, Corso di laurea magistrale in Ingegneria Dei Materiali Per L'Industria 4.0, 2025
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Abstract
Titanium alloys processed through laser powder bed fusion (LPBF) using in-situ alloying allow for a low-cost method to produce different microstructures and levels of solidification in titanium alloys. Pre-alloyed powder is not required to create these different alloys, as they are created using expensive powders. In this paper, iron additions of x = 1, 3, 5 weight percent were added to Ti6Al4V to explore how iron would affect both the processability of Ti6Al4V and the properties produced via LPBF. A process window was defined and an optimal processing condition was determined at P = 200 W, v = 800 mm/s, h = 0.105 mm, and t = 0.03 mm, which corresponds to VED ≈ 79.37 J/mm³.
Powder blends containing iron additions of 1, 3, and 5 weight percent were mixed mechanically together before being printed into 67° rotated layers with bidirectional stripes on a TRUMPF TruPrint 1000 under high-purity argon (less than 100 ppm oxygen)
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