Issue 43

P. Corigliano et alii, Frattura ed Integrità Strutturale, 43 (2018) 171-181; DOI: 10.3221/IGF-ESIS.43.13 171 Fatigue assessment of Ti-6Al-4V titanium alloy laser welded joints in absence of filler material by means of full-field techniques Pasqualino Corigliano, Vincenzo Crupi, Eugenio Guglielmino University of Messina, Italy pcorigliano@unime.it, http://orcid.org/0000-0003-0319-048X crupi.vincenzo@unime.it , http://orcid.org/0000-0001-7498-4733 eguglie@unime.it , http://orcid.org/0000-0001-7793-7406 Carmine Maletta, Emanuele Sgambitterra University of Calabria, Italy carmine.maletta@unical.it, http://orcid.org/0000-0002-9204-5358 emanuele.sgambitterra@unical.it , http://orcid.org/0000-0001-5593-399X Giuseppe Barbieri Centro Ricerche ENEA Casaccia – Rome, Italy giuseppe.barbieri@enea.it , http://orcid.org/0000-0001-5583-8634 Fabrizia Caiazzo University of Salerno, Italy f.caiazzo@unisa.it A BSTRACT . The aim of this research activity was to study the fatigue behavior of laser welded joints of titanium alloy, in which the welding was performed using a laser source and in the absence of filler material, by means of unconventional full field techniques: Digital Image Correlation (DIC), and Infrared Thermography (IRT). The DIC technique allowed evaluating the strain gradients around the welded zone. The IRT technique allowed analyzing the thermal evolution of the welded surface during all the fatigue tests. The fatigue limit estimated using the Thermographic Method corresponds with good approximation to the value obtained from the experimental fatigue tests. The obtained results provided useful information for the development of methods and models to predict the fatigue behavior of welded T-joints in titanium alloy. K EYWORDS . Fatigue; Welded joints; Marine structures; Digital Image Correlation; Infrared Thermography. Citation: Corigliano, P., Crupi, V., Guglielmino, E., Maletta, C., Sgambitterra, E., Barbieri, G., Caiazzo, F., Fatigue assessment of Ti-6Al-4V titanium alloy laser welded joints in absence of filler material by means of full-field techniques, Frattura ed Integrità Strutturale, 43 (2018) 171-181. Received: 19.10.2017 Accepted: 05.11.2017 Published: 01.01.2018 Copyright: © 2018 This is an open access article under the terms of the CC-BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.