Title :
Microcrack formation of iron-based alloys in laser spot welding for photonic packages
Author :
Tu, P.L. ; Liu, Deming ; Cheung, Ken ; Yiu, C.H. ; Lau, Angie
Abstract :
The laser welding technique have be applying to joining of photonic packages because of its high precision and productivity. In many cases, stainless steel (SST) and low carbon steel (LCS) are used as the welding materials. There exists solidification crack tendency because of no welding filler and the fast cooling rate. In this study, we present the study of the micro-cracks formation of the joint formed by laser welding. We discuss the failure mechanisms and propose recommendations for avoiding the micro-crack formation of welding SST and LCS system. SEM/EDX, OIM (orientation image microscope) were used in the present study.
Keywords :
carbon steel; failure (mechanical); joining materials; laser beam welding; microcracks; packaging; stainless steel; LCS; OIM; SEM/EDX; SST; failure mechanisms; iron-based alloys; laser spot welding; low carbon steel; microcrack formation; orientation image microscope; photonic packages; solidification crack tendency; stainless steel; Building materials; Cooling; Iron alloys; Optical materials; Organic materials; Packaging; Productivity; Scanning electron microscopy; Spot welding; Steel;
Conference_Titel :
Lasers and Electro-Optics, 2003. CLEO/Pacific Rim 2003. The 5th Pacific Rim Conference on
Print_ISBN :
0-7803-7766-4
DOI :
10.1109/CLEOPR.2003.1277281
