Investigation of material flow and thermomechanical behavior during friction stir welding of an AZ31B alloy for threaded and unthreaded pin geometries using computational solid mechanics simulation - Giorjão, Rafael Arthur Reghine; Fonseca, Eduardo Bertoni da; Ávila Diaz, Julián Arnaldo; Monlevade, Eduardo Franco de; Tschiptschin, André Paulo (Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2021)