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

Volume

2

fYear

2003

fDate

15-19 Dec. 2003

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics, 2003. CLEO/Pacific Rim 2003. The 5th Pacific Rim Conference on

Print_ISBN

0-7803-7766-4

Type

conf

DOI

10.1109/CLEOPR.2003.1277281

Filename

1277281