Abstract
This study was undertaken in order to assess absorption of a 10 kW fiber laser beam with tightly focused spot diameter of 200 μm in Type 304 austenitic stainless steel or A5052 aluminum alloy in bead-on-plate welding with a wide range of welding speeds from 17 to 300 mm/s, by using water-calorimetric measurement. The maximum absorptions of the steel and aluminum were 89 and 93% at the lowest speed, respectively. Their absorptions were high over 80% at less than 100 mm/s speeds and were reduced greatly by more than 20% at the highest speed. X-ray transmission in-site observation demonstrated that the center part of an incident beam with a bell-shape profile was delivered directly to a tip of a keyhole below 100 mm/s speed. High-speed video camera observation indicated that an incident beam was more partially exposed out of a keyhole inlet over 100 mm/s, which led to great decrease in laser absorption.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
