PSI - Issue 47

A. Califano et al. / Procedia Structural Integrity 47 (2023) 842–848 Author name / Structural Integrity Procedia 00 (2019) 000–000

847

6

Fig. 6. Fracture surfaces of specimens 1A1 (a), 1B1 (b), 1C1 (c), 1D1 (d), 1E1 (e), 1F1 (f).

4. Conclusions In this work a preliminary investigation on the mechanical behavior of Ti6Al4V laser-welded single-lap joints was carried out. The attention was focused on assessing the effect that different welding parameters may have on the mechanical properties of the final joints. For this reason, six specimens, cut out from six different joints obtained with given, different, terns of welding parameters (laser power, laser speed and laser focus), were equipped with two strain-gauges each and were subjected to static tensile tests. By analyzing the load/strain and load/displacement curves and by visual inspecting the fracture surfaces, it was found out that there is a clear dependence between the mechanical behavior of joints and the welding parameters. In particular, the lower the laser beam speed, the higher the maximum load to failure. Near future investigations will deal with metallographic analyses of the fracture surfaces in order to quantitatively assess the link between the laser welding parameters and the fracture surfaces characteristics. Furthermore, fatigue tests will be carried out on the remaining virgin specimens and finite-element simulations will be implemented for exploring further conditions and scenarios. References Akman, E., Demir, A., Canel, T. Sinmazçelik, T., 2009. Laser welding of Ti6Al4V titanium alloys. J. Mater. Process. Technol. 209(8), 3705–3713. ASTM International, ASTM E8 / E8M-16a, 2016, Standard test methods for tension testing of metallic materials. ASTM International, West Conshohocken, (PA), USA. Auwal, S.T., Ramesh, S., Yusof, F., Manladan, S.M., 2018. A review on laser beam welding of titanium alloys. Int. J. Adv. Manuf. Technol. 97(1– 4), 1071–1098.