Defect formation mechanisms and preventive procedures in laser welding
S. Katayama, JWRI Osaka University, Japan
Abstract:
This chapter deals with the terminology, characteristics, formation conditions, causes, occurrence mechanisms and preventive procedures or measures of laser welding defects or imperfections. In particular, porosity and solidification cracking are described in detail in conjunction with laser welding phenomena.
Key words
laser welding defects
welding imperfection
weldability
porosity
solidification cracking
melt flows
keyhole behavior
bubble formation
12.1 Introduction
Laser welding can join parts together at very fast speeds or produce deep-penetration welds efficiently in any environment such as air, shielding ...
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