An electron-beam welding operation uses the following process parameters: accelerating voltage =\n25 kV, beam current = 100 milliamp, and the circular
An electron-beam welding operation uses the following process parameters: accelerating voltage =
\r\n25 kV, beam current = 100 milliamp, and the circular area on which the beam is focused has a
\r\ndiameter = 0.020 in. If the heat transfer factor = 90%, determine the average power density in the
\r\narea in Btu/sec in2.