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Handbook of Laser Welding Technologies by S Katayama

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12

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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