Abstract In this study, using a combination of several experimental and computational methods, an attempt to improve the understanding of some important phenomena accompanying the process of explosive welding is made. The high-speed shooting was used to observe the formation of a re-entrant jet. Various methods of the materials characterization were used to estimate the morphology of the interface, the distribution of the liquid phase and analyze the evolution of the structure in the process of high-velocity oblique collision. Simulating the process of high-velocity collision using the smoothed particles hydrodynamics (SPH) method allowed us to accurately reproduce formation of the wave boundary, vortex zones, as well as the formation of a jet moving ahead of the collision point. Based on the simulation results, several significant modifications of the Bahrani-Black-Crossland model of the waves formation were done, and a new explanation for the vortex zones formation was proposed. Numerical simulation of the cooling process showed that the solidification of the liquid phase occurs under conditions of the rapid solidification during melt spinning. Combining several numerical-based approaches, a welding window for the steel-steel system was built. The results obtained show a good agreement with currently existing concepts of welding during the high-velocity collisions.

中文翻译：

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通过数值模拟和实验研究相结合更好地理解爆炸焊接

摘要 在本研究中，结合多种实验和计算方法，试图提高对爆炸焊接过程中一些重要现象的理解。高速射击被用来观察折返射流的形成。采用多种材料表征方法，估计了界面形貌、液相分布，分析了高速斜向碰撞过程中的结构演化。使用平滑粒子流体动力学 (SPH) 方法模拟高速碰撞过程使我们能够准确地再现波边界、涡流区的形成以及在碰撞点前方移动的射流的形成。根据仿真结果，对波浪形成的 Bahrani-Black-Crossland 模型进行了几次重大修改，并提出了对涡带形成的新解释。冷却过程的数值模拟表明，液相的凝固发生在熔融纺丝过程中快速凝固的条件下。结合几种基于数值的方法，建立了钢-钢系统的焊接窗口。获得的结果表明，在高速碰撞过程中与当前现有的焊接概念非常吻合。冷却过程的数值模拟表明，液相的凝固发生在熔融纺丝过程中快速凝固的条件下。结合几种基于数值的方法，建立了钢-钢系统的焊接窗口。获得的结果表明，在高速碰撞过程中与当前现有的焊接概念非常吻合。冷却过程的数值模拟表明，液相的凝固发生在熔融纺丝过程中快速凝固的条件下。结合几种基于数值的方法，建立了钢-钢系统的焊接窗口。获得的结果表明，在高速碰撞过程中与当前现有的焊接概念非常吻合。