Of .monel / Cu Composite Explosion Nanorods And Numerical Simulation Of Composite Process

Composite metallic material, used in the field of electronical, communicational and other civil equipments, are required to have the properties of high strength, high thermal conductivity and high leak tightness. The high-bonding-strength Monel/Cu clad rod was prepared by means of explosive cladding technology for the first time. The explosive cladding parameters were optimized in light of the related theory and experimental analysis, and the cladding process was numerically simulated in the present work. The conclusions were as follows:1,By means of computer-aid-design program, the explosive cladding parameters of Monel/Cu system were calculated and the explosive cladding window was obtained, then the optimal parameters were chosen.2,The Monel/Cu bimetal clad rod was produced with the explosive cladding technique. The microstructure and mechanical properties of the bonding interface in some different processing were analyzed by means of optical microscope, scanning electron microscopy, energy spectrum analysis and shearing separate tests. The results showed that the smooth bonding interface was transformed to a wavy bonding interface as the explosive ratios increased. Deformation twins were observed in the grains of the copper matrix, whose amount increased with the increasing of the explosive ratio. There were a certain amount of molten zones in the interface and fine columnar grains existed in this molten zone. EDS analysis indicated that diffusion did not take place between bond interfaces, however, diffusion was observed after annealing. The shearing fracture took place in the copper matrix and not in the bond interface. The microhardness, in the vicinity of the interface, was higher than that of metal matrix, and gradually decreased away from the interface.3,Explosive cladding process was numerically simulated through finite element software LS-DYNA. the velocity of clad tube,pressure distribution of collision zone were calculated during the cladding process. Compared with theoretically calculation and experimental results, the numerically simulated results showed that, the numerically simulated results were corresponded to theoretic results and experimental results, the mathematical model can simulate the process of explosive cladding correctly. However, the jet formation and the wavy interface can't be simulated during the explosive cladding process. The numerical simulation can be referred to explosive cladding technology.