TY - RPRT TI - Flow Patterns During Friction Stir Welding AU - Guerra, M. AU - Schmidt, C. AU - McClure, J. C. AU - Murr, L. E. AU - Nunes, A. C. AU - Munafo, Paul M. PY - 2002 UR - https://ntrs.nasa.gov/citations/20020092188 ID - 20020092188 ER -