Numerical Simulation on Electron Beam Welding Temperature Field of Al-Li Alloy

Abstract

The numerical simulation of electron beam welding temperature field for 2090 Al-Li alloy sheet of 2 mm thickness is conducted by using the ANSYS software. The combined model of Gauss surface heat source with cylindrical body heat source in linear attenuation is used according to the unique nail-shaped weld of electron beam welding joint, and the distribution cloud image of temperature field and the instantaneous weld thermal cycle curves of Al-Li alloy electron beam welding are obtained through calculation. The effect of welding parameters such as electron beam power and welding speed on the distribution of temperature field and weld width is investigated. Results show that electron beam welding has a very high rate of both temperature ascending and descending, and the rate of temperature ascending is higher than that of descending. With the increase of electron beam power or decrease of welding speed, the temperature of fusion zone elevates, and the weld width increases. The appearance of weld obtained through numerical simulation is greatly consistent with the practical welding.

Research on the formation mechanism of thermal crack for laser welding of IC 10 alloy

“…If it can be repaired by laser welding, it has broad application prospects and will bring great economic benefits. Currently, much research has been conducted on laser welding and electron beam welding of various superalloys [10][11][12][13] , but there are few reports on the welding of new Ni3Al-based IC10 single crystal superalloy. Xin 14 found when the welding speed is low, the crack sensitivity increases, crack is more likely to occur, and the welding cracks propagate along the crystal in the laser welding of IC10 single crystal superalloy.…”