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Further Reading
1 Kou, S. (1996). Transport Phenomena and Materials Processing. New York: Wiley.
2 Nasiri, M.B. and Enzinger, N. (2019). Powerful analytical solution to heat flow problem in welding. International Journal of Thermal Sciences, 135: 601–612.
Problems
1 2.1 In one welding experiment, 50‐mm‐thick steel plates were joined using electroslag welding. The current and voltage were 480 A and 34 V, respectively. The heat losses to the water‐cooled copper shoes and by radiation from the surface of the slag pool were 1275 and 375 cal/s, respectively. Calculate the heat source efficiency.
2 2.2 It has been reported that the heat source efficiency in electroslag welding increases with increasing thickness of the workpiece. Explain why.
3 2.3Consider the welding of 25.4‐mm‐thick steel plates. Do you prefer to apply Rosenthal's two‐ or three‐dimensional heat flow equation for full‐penetration electron beam welds? What about bead‐on‐plate, gas–tungsten arc welds?Suppose you are interested in studying the solidification structure of the weld metal and you wish to calculate the temperature distribution in the weld pool. Do you expect Rosenthal's equations to provide reliable thermal information in the pool? Why or why not?In multipass welding, do you expect a higher or lower cooling rate in the first pass than in the subsequent passes? Why?
4 2.4