L'articolo uscito su Metallurgia Italiana, dal titolo "Impact of treatment time on single annealing thermal cycle performed on Ti-6Al-4V Titanium alloy specimens obtained using LPBF technology" è stato pubblicato nella rubrica "memorie Scentifiche" e vede tra gli autori E. Ferrari, S. Gaiani, M. Gozzi, M. Lassinantti Gualtieri, F. Mantovani, G. Ponzoni, P. Veronesi.
Un successo per le attività di ricerca e sviluppo del Gruppo Veca e di Vsystem che rafforza la rete di collaborazioni universitarie e la capacità di innovazione interna alle aziende che ne fanno parte.
Abstract
Additive manufacturing has become a prominent solution for producing intricate components with complex geometries.
Titanium alloy Ti-6Al-4V is widely used in additive manufacturing due to its excellent mechanical properties, low
density, and corrosion resistance. However, residual stresses generated during the laser powder bed fusion (LPBF)
process require specific heat treatments. This research aims to determine the optimal temperature-time parameters of
thermal cycles able to reduce residual stresses while achieving desired microstructural conditions. Previous research
investigated the impact of heat treatments at different temperatures, with annealing at 800°C and 835°C for 2 hours
resulting in the best mechanical properties. The samples treated at 800°C exhibited increased ductility due to the
onset transformation of α’ to α + β. The samples treated at 835°C showed a favorable balance between mechanical
properties and plasticity. This study expands on the previous research by comparing different treatment times at
optimal temperatures and investigating their effect on average mechanical properties and their variance. Complete
mechanical and microstructural characterization, including XRD analysis, was conducted on the treated samples.
