Multi-Factor Monitoring of Hybrid Laser-Arc Welding Applications

Objective:

The goal of this project was to characterize inline coherent imaging technology (ICIT) for hybrid welding applications.  Shipbuilders need data to understand the monitoring performance, operating characteristics, benefits, and implementation requirements of hybrid laser-arc welding applications. The objectives included:

• Evaluating monitoring performance of five process variables: workpiece height, seam profile, keyhole depth, finished weld surface, and transverse profile of full penetration butt joints
• Evaluating discontinuity/defect detection and process monitoring capability using “quality scenario test” procedures that simulate unacceptable quality conditions (i.e. joint fit-up conditions and potential defects like porosity, lack of fusion, lack of penetration, undercut, underfill, etc)
• Using the quality scenario test procedures; determine measurement sensitivity, reproducibility, and repeatability
• Assessing performance for quality monitoring of pre-weld, in-weld, and post-weld conditions for shipbuilding applications
• Assessing implementation impact and requirements

Contact NSRP For Final Report