Akademik Veri Yönetim Sistemi
International Journal of Advanced Manufacturing Technology, 2025 (SCI-Expanded, Scopus)
Gamma titanium aluminide intermetallic alloys (γ-TiAl) find extensive application in the automotive and aerospace engineering sectors, primarily for achieving weight reduction in various components. The utilization of additive manufacturing (AM) for producing γ-TiAl components has gained significant traction in recent years. AM presents notable advantages such as high design flexibility and reduced material consumption. However, it may also result in parts with poor surface quality. The advancement in laser technology has introduced new approaches, including AM of metals. Laser Polishing (LP) emerges as a viable alternative for improving surface roughness by selectively remelting the top layer of the surface. In the current investigation, concave and convex γ-TiAl samples, fabricated using electron beam melting (EBM), underwent laser polishing facilitated by a robotic manipulator. The outcomes of the LP process were assessed through morphological analyses, microstructural analyses, and microhardness measurements. Morphological analyses revealed a considerable enhancement in the roughness values, demonstrating an improvement of approximately 95–98% for both concave and convex samples. Microstructural analysis uncovered that the remelted zone exhibited a needle-like martensitic phase, contrasting with the lamellar (α2 + γ) microstructure produced by EBM. Microhardness measurements in the LP region indicated a noticeable increase, ranging approximately from 28% to 36%, on the laser-polished surface.