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《Transactions of the China Welding Institution》 2008-08
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Upper limit of coated amorphous foils explosive welding

SUN Yuxin1,2, FU Yanshu1, LI Qiang1,2, WANG Jinxiang1, ZHANG Xiaoli1 (1. National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing 210094, China; 2. The 27th Research Institute of CETC, Zhengzhou 450000, China).  
The temperature field of foil explosive welding was simplified to one dimension non-steady heat conduction, the temperature of welding interfaces was given and changed with time. With introduction of the thermo-softening model at welding interfaces and according to the time of the tensile wave arrived at the interface, the binding strength can be confirmed. Analyses indicate that the material crystallized limit and binding strength of coating material with based metal and welding interface are the most important factors, which control the upper limit of explosive welding. The Fe-based amorphous foil coated with copper was researched. During the experiment designing, ideas of damage mechanics were used to set defects to accelerate the decaying of tensile wave. The relationship between the tensile wave strength and impact velocity was simulated by LS-DYNA, then the three upper limits were caclculated by the important factors, and the minimum of them was the upper limits.
【Fund】: 国家部委基金资助(A2620061131);; 国家863高技术研究发展计划资助项目(2006AAJ229)
【CateGory Index】: TG456.6
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