Abstract Characteristic features of impact welding were investigated in a simple model system of colliding copper single crystals. Large grained sheets were used to approximate single crystal to single crystal impact. Optical microscopy and electron backscatter diffraction (EBSD) analyses showed multiple features of the weld interface, which include deformation twinning, adiabatic shear banding, localized melting, and dynamic recrystallization. To support the microstructural findings, numerical simulation based on smoothed particle hydrodynamics method was conducted to predict the local temperature, pressure, and strain distributions. The insights gathered here will aid in the design of materials combinations and systems for impact welding.

中文翻译：

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模型系统冲击焊接的显微组织发展

摘要 在一个简单的铜单晶碰撞模型系统中研究了冲击焊接的特性。大颗粒片用于近似单晶对单晶的影响。光学显微镜和电子背散射衍射 (EBSD) 分析显示了焊接界面的多种特征，包括变形孪生、绝热剪切带、局部熔化和动态再结晶。为了支持微观结构的发现，进行了基于光滑粒子流体动力学方法的数值模拟来预测局部温度、压力和应变分布。此处收集的见解将有助于设计用于冲击焊接的材料组合和系统。