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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:
Solve the support reactions at A and D by using the force method. A is a fixed support; B and C are rigid joints; and D is a pin support. EI is constant for all members.
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Would I be able to get the help I need with multiple effect evaporator with vaccuum P&ID for boiler and steam turbine system as well as perforated plates in a clarifier done in a
Find out the centroid of an area of a semicircle: Find out the centroid of an area of a semicircle illustrated in Figure. Solution You shall note that it is not p
Complaints of Engine Starting: If there is a problem related to the starting of the bike, it can be due to mechanical as well as electrical reasons. The possible reasons could be
example on operation sheet?
b. Assuming a 20 MW simple cycle gas turbine with a firing temperature of 1600K develop an analysis of a combined cycle. Assume that Tmax in the Rankine cycle is 560 C, Pmax = 60
Hydrometer: Hydrometer (Figure) is used to measure the specific gravity of battery fluid (electrolyte). Figure: Hydrometer
example of 2nd corollary of first law of thermodynamics
Importance of stresses in shaft: What is importance of stresses in shaft ? Sol.: In shaft the following significant stresses occur. 1. A maximum shear stress occurs on
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