The Experiment Design for Explosive Welding of Multilayer Amorphous Foils

Because of the high strength and temperature sensitivity of the metal glass, its lower limit is higher and upper limit is lower than crystal metal when bulk metal glass was prepared by amorphous foils explosive welding. In this paper, the surface of foils was coated by copper to decrease surface hardness. Results showed that this method can reduce the lower limit, concentrate the energy of plastic collision mainly on coating layer and remarkably minimize foils heat effect zone. Besides, during the experiment designing, ideas of damage mechanics were used to set defects to accelerate the attenuation of tensile waves, so the tensile strength which arrived at welding interfaces can be reduced,combined with the model of thermosoftening at welding interfaces, it can be concluded that the upper limit was increased. Both of upper limit and lower limit were improved, it can be sure that the welding window was effectively expended, so the purpose of preparing bulk metal glass by explosive welding amorphous foils would be easier to implement.