Effect of microstructural length scales on spall behavior of copper
Effect of microstructural length scales on spall behavior of copper
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DOI：
10.1007/s11661-004-0212-7
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发表时间：
2004-09
期刊：
影响因子：
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通讯作者：
R. Minich;J. Cazamias;Mulayam Kumar;A. Schwartz
中科院分区：
文献类型：
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作者：
R. Minich;J. Cazamias;Mulayam Kumar;A. Schwartz
一项量化特定微观结构特征对 99.999 pct 铜剥落行为影响的系统研究揭示了失效过程对长度尺度的强烈依赖性。使用 35 毫米单/两级轻气枪对铜飞片进行速度范围为 300 至 2000 m/s（或冲击压力为 5 至 45 GPa）的冲击载荷实验，结果表明单晶比细晶多晶和内部氧化单晶具有更高的抗散裂性。然而，与之前报道的结果相比，细晶粒（∼8μm）多晶样品的抗损伤能力低于粗晶粒（50μm和133μm）样品。这些观察结果已经在每个微观结构固有的长度尺度的背景下进行了分析，并使用最近开发的分析模型进行了建模。
A systematic study to quantify the effects of specific microstructural features on the spall behavior of 99.999 pct copper has revealed a strong dependence of the failure processes on length scale. Shock loading experiments with Cu flyer plates at velocities ranging from 300 to 2000 m/s (or impact pressures from 5 to 45 GPa) using a 35-mm single/two-stage light gas gun revealed that single crystals exhibit a higher spallation resistance than fine-grained polycrystals and internally oxidized single crystals. However, in contrast to previously reported results, the fine-grained (∼8-µm) polycrystalline samples exhibit lower damage resistance than the coarse-grained (50- and 133-µm) samples. These observations have been analyzed in the context of the length scale inherent in each of these microstructures, and modeled using an analytical model developed recently.