High Energy Beam Welding
Electron Beam Welding
Electron Beam Welding
- A high-velocity, narrow-beam electron converting into Heat to produce a fusion weld in a vacuum (Multiple degrees of vacuum).
- From foil to plate as thick as 150mm.
- Very small heat effected zone
- Power density PD = f1EI/ A
- A high-power laser beam as the source of heat to produce a fusion weld without a filler material
- Due to the high density energy on a small focused area, narrow and deep penetration capability
- Pulsed beam for spot-weld thin samples
- Continuous beam for deep weld and thick sample
- e.g.: Gillette Sensor razor
- No filler metals but w/o local melting with either pressure-alone or heat and pressure.
- Intimate contact is necessary by a through cleaning or other means.
- Forge welding – Samurai sword
- Cold welding – high pressure
- Roll welding
- Hot-pressure welding
- Diffusion welding at 0.5Tm
- Explosive welding: Mechanical locking commonly used to bond two dissimilar metals, in particular to clad one metal on top of a base metal over large areas
- Friction welding: Friction to heat
- Ultrasonic welding: Oscillatory shear stresses of ultrasonic
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