Electron beam welding(ebw )-effect of process parameters, Mechanical Engineering

Assignment Help:

EFFECT OF PROCESS PARAMETERS

High voltage gives high velocities in the electron beams. The mutual repulsion effects in the constituent electrons will be less marked at high velocities than at low velocities. Therefore, the higher the voltage, the sharper the possible focus. The sharper the possible focus, the deeper the penetration for a given power. The longer the working distance, the greater the depth of field, and greater the focus tolerance. This of course is related to convergence of the beam in respect to the work piece. High voltage beams have a narrower angle of convergence than low voltage beams. As penetration in a material is proportional to the energy density during welding, surface speed will also affect penetration. The slower the speed, the greater the penetration, however, if the speed is too slow the entire work piece will heat up and a massive heat affected zone will result. Therefore the lowest practical speed is limited to around 250 mm per minute. The factors, which influence weld depth, are as follows:

  • Beam current
  • Accelerating voltage
  • Welding speed
  • Joint material
  • Joint design
  • Focal point

 


Related Discussions:- Electron beam welding(ebw )-effect of process parameters

Entropy, why entropy always tends to increase?

why entropy always tends to increase?

Literature review on co2 positive displacement pump, How can I get the lit...

How can I get the literature review on fabrication and construction of a modified Co2 single stroke positive displacement pump driven with electric motor

Determine the maximum value of the coefficient of friction, Determine the m...

Determine the maximum value of the coefficient of friction: A force of 200 N inclined at 60 o to the horizontal is applied to the block A weighing 400 N. find out whether blo

Find out dimension of the cross section of the beam, Q.  A wooden beam of t...

Q.  A wooden beam of the rectangular cross section is subjected to bending moment of 5KNm. If the depth of section is to be double the breadth and stress in wood is not to exceed 6

Corrosive properties of caustic, Q. Corrosive properties of caustic? So...

Q. Corrosive properties of caustic? Sodium hydroxide, more commonly known as Caustic Soda or simply ‘Caustic', is widely used in the petrochemical industry to neutralize acidic

Advantages and properties of alloy steel, The different advantages of alloy...

The different advantages of alloy steel are as: (a) Higher strength, toughness and hardness upon surface and over bigger cross-section. (b) Better harden-ability and retentio

Air blast chillers, comment on types of air blast chiller (not freezer)

comment on types of air blast chiller (not freezer)

Blasting abrasive, Blasting Abrasive: Sand had been use widely before ...

Blasting Abrasive: Sand had been use widely before new abrasive media invented. Today, manufacturer had more choices and better options in choosing blasting media for their ow

Testing of resistance welds, TESTING OF RESISTANCE WELDS There are a nu...

TESTING OF RESISTANCE WELDS There are a number of destructive and non destructive tests available for testing the welds obtained by resistance welding. Radiographic or Ultrason

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