Fracture toughness behaviour in AISI 4130 steel of electron beam welding

✍ Scribed by Doong Ji-Liang; Chi Jing-Ming; Tan Yen-Hung

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 844 KB
• Volume: 36
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(90)90276-m

✦ Synopsis

This investigation

was undertaken to evaluate if fracture toughness and weld porosity could be improved to satisfied characteristics using various welding speeds and electron beam oscillation patterns. Porosity increases in general as welding speed increases. Correlations have been found between fracture toughness and weld porosity.

The fracture toughness improved with reducing a large amount of weld porosity, due to proper beam deflection patterns. One of the interesting results indicated that the existence of a little base porosity could absorb more energy due to local plastic deformation and this fact could explain the increasing of fracture toughness at those situations.