Electron beam welding(ebw)-basic principle, Mechanical Engineering

Assignment Help:

BASIC PRINCIPLE OF ELECTRON BEAM WELDING(EBW)

 

Electron beam welding which utilises a heat source of electrons which are accelerated by an electric field to mextremely high speeds and focused to ma sharp beam by electrostatic or electromagnetic fields , which is used for welding a wide range of metals in thickness ranging from foils to extremely thick sections.

Electrons are produced at the cathode surface by thermonic emission. The most common emitter material used is tungsten, which contains a small percentage of rhenium. They are being accelerated by high voltage applied between the cathode and the anode. The shape of the bias cup and anode are so designed that the electrons are focused by the electrostatic field and emerge through the anode aperture as a collimated beam. This beam impinges on to the target by the magnetic field of focusing lens, which permits the high concentration of power at the point of impact. The kinetic energy of the electrons is transferred into heat energy which melts / fuses the metal. In general, electron beams in the energy ranges from 100 kV to 10 MV with average powers ranging from 1 kW to 500 kW.


Related Discussions:- Electron beam welding(ebw)-basic principle

Benefits of a good layout and design of plant, Q. Benefits of a good layout...

Q. Benefits of a good layout and design? The benefits of a good layout and design cannot be overemphasized. They provide an irreplaceable safety factor throughout the life of t

Matlab Applied Optimization Problem, A fenced enclosure consists of a recta...

A fenced enclosure consists of a rectangle of length L and width 2R, and a semicircle of radius R, as shown in Figure P20. The enclosure is to be built to have an area A of 1600 ft

What is indirect extrusion, Q. What is Indirect extrusion? In indirect ...

Q. What is Indirect extrusion? In indirect extrusion, also known as backwards extrusion, the billet and container move together while the die is stationary. The die is held i

Two stroke and four stroke engines, T w o Stroke and Four Stroke Engines:...

T w o Stroke and Four Stroke Engines: In  the two stroke engines thermodynamic cycle is completed in One revolution of crank shaft whereas in 4 stroke engines the cycle is c

Effective communication is an intergral aspect, Effective communication is ...

Effective communication is an itergral aspect in the mechanical engineering field, base on arguement

Evaluate an expression for minimum number of teeth, Evaluate an expression ...

Evaluate an expression for minimum number of teeth on the wheel if interference is to be avoided between two mating gears. Also determine the above expression if gear ratio is equa

Computer aided manufacturing, Computer systems to plan manage, and control...

Computer systems to plan manage, and control the operations of a manufacturing plant through either direct or indirect computer interface with the plants production resource

Battery components , Cell Connectors A cell connector connects the ne...

Cell Connectors A cell connector connects the nearby cell with two terminals of opposite polarity (sign). Post strap connect the plates to the terminal. Electrolyte

Evaluate the stresses in the rod, A steel tube of 30 mm external diameter a...

A steel tube of 30 mm external diameter and 20mm internal diameter encloses a copper rod of 15mm diameter to which it is rigidly joined at each end. If at a temperature of 10 o C,

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd