𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Experimental investigation of weld pool formation in electron beam welding

✍ Scribed by Peter Petrov; Chavdar Georgiev; Georgy Petrov

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
344 KB
Volume
51
Category
Article
ISSN
0042-207X

No coin nor oath required. For personal study only.

✦ Synopsis

The energy transfer mechanism from an electron beam to a metal target, weld pool and keyhole of formation during electron beam welding was studied using a collector for secondary emitted particles, light photo diodes and CCD techniques. The physical processes in the welding pool and plasma cavity are discussed. It is shown that the nature of the heat source in a weld pool is non-stationary and the dynamic processes occurring in both the welding pool and the plasma cavity play a dominant role in the formation of the welding seam during electron beam welding of metals. Periodical molten metal flows were determined at low oscillation frequencies of the welding seam's root for frequency between 0.5 and 50 Hz and on the surface of the welding pool in the interval 5-850 Hz. The frequency spectrum of the secondary electron emission signal is in the order of a few kHz.

πŸ“œ SIMILAR VOLUMES

Investigation of electron-beam welding i
Investigation of electron-beam welding in wrought Inconel 706β€”experimental and numerical analysis
✍ Paolo Ferro; Andrea Zambon; Franco Bonollo πŸ“‚ Article πŸ“… 2005 πŸ› Elsevier Science 🌐 English βš– 851 KB

Electron-beam welding (EBW) is commonly employed in the aeroengine industry for the welding of high integrity components, fabricated from high-strength superalloys. For such applications, it is important to predict distortions and residual stresses induced by the process. Melt run trials have been c

Calculation of weld parameters and therm
Calculation of weld parameters and thermal efficiency in electron beam welding
✍ E. Koleva; G. Mladenov; K. Vutova πŸ“‚ Article πŸ“… 1999 πŸ› Elsevier Science 🌐 English βš– 156 KB

Using the model of quasi-steady thermal distribution in a solid sample, generated by a linear heat source, moving at constant welding velocity, values of the weld depth at a given weld width are calculated and compared with the experimental data. A discussion for thermal efficiency and an analysis c

Fracture toughness behaviour in AISI 413
Fracture toughness behaviour in AISI 4130 steel of electron beam welding
✍ Doong Ji-Liang; Chi Jing-Ming; Tan Yen-Hung πŸ“‚ Article πŸ“… 1990 πŸ› Elsevier Science 🌐 English βš– 844 KB

## 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 betwee