Abstract
Al–Li alloys are characterized by strong anisotropy. 2198 Al–Li sheets were joined via Friction Stir Welding (FSW) in parallel and orthogonal direction with respect to the rolling one. The material microstructure and the different phases were individuated by means of TEM observations in different sections of the produced joints; in addition, the mechanical properties were evaluated by means of tensile and fatigue tests at room temperature; the fatigue tests were conducted in axial control mode with R = σ min/ σ max = 0.33 for different welding conditions. The crack initiation and propagation in the welded zone was also studied by applying thermoelastic stress analysis (TSA) during cyclic fatigue tests, employing single edge notched specimens. Thermoelastic data were used to measure the principal stresses and principal strains on the specimens surface around the crack tip, according to growth rate; all the results were validated by employing finite element analysis (FEM) to model the crack evolution.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
