2009 Fiscal Year Final Research Report

Smart Processes Produced by Clarification of Fundamental Phenomena in Ultra-High-Power-Density Fiber Laser Welding

Research Project

Project/Area Number	20760492
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Single-year Grants
Research Field	Material processing/treatments
Research Institution	Osaka University
Principal Investigator	KAWAHITO Yousuke Osaka University, 接合科学研究所, 准教授 (70379105)
Project Period (FY)	2008 – 2009
Keywords	接合 / 溶接
Research Abstract	The objectives of this research are clarification of fundamental phenomena and development of smart process in ultra-high-power-density fiber laser welding. As for the fundamental clarification, the laser absorption of SUS304 stainless steel achieved 80% and the absorption mechanism was revealed on the basis of X-ray high-speed pictures of the keyhole. With respect to smart process, laser adaptive control applied for continuous-wave fiber laser welding. Consideration of thermal storage effects led to success of stable sound welds at acceleration or deceleration in welding speed.

(4 results)