Abstract To study the dynamic response characteristics of 93W alloy spherical component under high overload, the deformation patterns of the 93W spherical component under different overloads are obtained by the sphereistic impact test, and the microscopic response characteristics are studied by the metallographic analysis experiments. Finally, the response characteristics are analyzed by the finite element method and the stress wave theory. The results show that with the change of impact overload, the axial direction of the 93W spherical component changes linearly with the radial deformation, and the axial strain increases with the increase of the impact overload. At the same time, along the radial direction from the center of the sphere, the micrograin distribution of 93W appears densely packed and sparsely separated, and the grain density is uniformly changed between dense area and sparse area, showing a ring-shaped “bright band” phenomenon between light and dark, and the width of the “bright band” is related to the size of the dense area of the grain; with the increase of the impact overload, the 93W alloy component first breaks at the central axis and the radial maximum position, and the fracture mode changes from the crystal fracture to the transgranular fracture tendency, and the two fracture forms eventually coexist.

中文翻译：

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球形结构93W合金的动态响应特性

摘要 为研究93W合金球形构件在高过载下的动态响应特性，通过球面冲击试验获得了93W合金球形构件在不同过载下的变形模式，并通过金相分析实验研究了其微观响应特性。最后，通过有限元方法和应力波理论分析了响应特性。结果表明，随着冲击过载的变化，93W球形元件的轴向随径向变形呈线性变化，轴向应变随着冲击过载的增加而增大。同时，从球心沿径向，93W的微晶分布呈现密堆积、疏散分布，且晶粒密度在密集区和稀疏区之间均匀变化，在明暗之间呈现出环状的“亮带”现象，“亮带”的宽度与晶粒的密集区的大小有关。 ; 随着冲击过载的增加，93W合金构件首先在中心轴和径向最大位置断裂，断裂方式由晶体断裂向穿晶断裂趋势转变，两种断裂形式最终并存。