J. W. Pew, J. H. Record, C. D. Sorensen, Brigham Young University, Provo, UT; T. W. Nelson, BRIGHAM YOUNG UNIVERSITY, PROVO, UT

Summary: A study of the essential process variables of Friction Stir Welding and their relation to heat input. Also included is the effect these parameters have on weld nugget size and the heat affected zone.