ORNL/CaSSSOS To be presented at the 5Ih International Conference on Trends in Welding Research, June 1-5,1998, Pine Mountain, Georgia Neural Network Modeling of Pulsed-Laser Weld Pool Shapes in Aluminum Alloy Welds J. M. Vitek, Y. S. Islander, E. M. Oblow, S. S. Babu and S. A. David Oak Ridge National Laboratory Oak Ridge, Tennessee 37830-6376 U. S. A. P. W. Fuerschbach Sandia National Laboratories Albuquerque, New Mexico U. S.A. , H. B. Smartt, D. P. Pace, C. R. Tolle Idaho National Engineering and Environmental Laboratory Idaho Falls, Idaho U. S. A. MASTER N 'The submkted manuscript hac been a wed by a contractor d the U. S. Gowrtnnenl under contract No. DE-AC05-WFl22464. Accordrgly. the U.S. Government retairs a nonexdusive. royaly-free licanse lo publish or repfoduca the pubkhed form 01 thls contribllbn, or allow others to cb so. for U.S. Government pupoSeSr