Promoted by the Italian Metallurgy Association in cooperation with IFHTSE, the conference was held at University of Lecce on April 17-19 2024.
During the event, Elisa Ferrari, from Veca Group showcased a presentation focusing on: "the Impact of treatment time on single annealing thermal cycle performed on Ti-6Al-4V Titanium alloy specimens obtained using LPBF technology.
The paper, part of the Phd developed in cooperation with Università di Modena Reggio Emilia and Veca Group, was published on the April issue of Italian Metallurgy Review.
Among the authors Prof. Paolo Veronesi, UniMoRe Engineering dept. Enzo Ferrari and Silvia Gaiani, Vsystem' CEO.
The paper's abstract is the following:
“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.”
