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


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


Posted Date: 9/17/2012 7:07:15 AM | Location : United States

Related Discussions:- Electron beam welding(ebw )-effect of process parameters, Assignment Help, Ask Question on Electron beam welding(ebw )-effect of process parameters, Get Answer, Expert's Help, Electron beam welding(ebw )-effect of process parameters Discussions

Write discussion on Electron beam welding(ebw )-effect of process parameters
Your posts are moderated
Related Questions
LASER BEAM MATERIAL PROCESSING   Light Amplification of Stimulated Emission of Radiation (LASER) is generated when a lasing medium is excited by a source of energy. Gases li

Centrifugal Filter and Screen Filter Cleaning :   Oil may contain impurities. Since the oil passes through all the engine parts, the impurities may harm the parts and cause imprope

Evaluate maximum inclination that can climb: Q: A four wheel drive can as shown in the figure has mass of 2000Kg with the passengers. The roadway is inclined at the angle wit

Q. Explain about Vertical Vessels? Vertical vessels shall normally be designed as self-supporting units, and shall resist overturn based upon wind or earthquake considerations.

Explain the uses of Pier and Well Foundations Well foundations are used to transmit large loads from piers of bridges and other marine structures. These are constructions carr

Calculate for spring amount of load carried: The table below gives specific of a compound spring consisting of two co-axial close-coiled springs. If the spring is subjected to

Q. What is Metal Jacketing? a) Metal jacketing shall be Alcan T-3000-H14 series, T-1100-H14 or approved equivalent stucco embossed aluminum with a factory applied moisture barr

wet process of portland cement

(a) Describe a vector and scalar ? (b) What is meant by line of action of vector ? (c) What are displacement vectors and position vector ? (d) Calculate the component of t

Basic Concep: Proper care and maintenance are essential for trouble free operation and optimum performance of the motorcycle. A quality service at regular intervals ensures that e