Mechanical properties and shock-induced chemical reaction behaviors of cold-rolled Al/Ni multi-layered composites
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摘要: 基于冷轧成型工艺,采用不同的轧制道次制备Al/Ni多层复合材料。开展了Al/Ni多层复合材料准静态压缩和准密闭二次撞击反应实验,对它的力学性能和冲击释能特性进行测试。同时,通过扫描电镜得到了材料的细观结构特性,分析了Al/Ni多层复合材料细观特性对宏观力/化学行为的影响机制。结果表明,基于冷轧技术制备的Al/Ni多层复合材料比粉末压制而成的Al/Ni复合材料塑性更强,材料的抗压强度总体随冷轧次数的增加呈上升趋势。另外,冷轧3~5道次的Al/Ni多层复合材料的准密闭二次撞击反应实验表明,材料在相同的撞击速度(800~1 500 m/s)下释放的化学能随着轧制道次的增加而逐渐降低。Abstract: Al/Ni multi-layered composites were manufactured by cold rolling with different passes. The influence of cold rolling passes on the mechanical properties and shock-induced chemical reaction (SICR) behaviors of Al/Ni multi-layered composites was investigated by quasi-static compression tests and impact initiation experiments. A scanning electron microscopy (SEM) was used to obtain the microstructures of the Al/Ni multi-layered composites, and the microstructures from the scanning electron microscopy images were used to explain the experimental results. The results show that the cold-rolled Al/Ni multi-layered composites behave more plastically than the powder-compacted Al/Ni composites do. The compression strength of the Al/Ni multi-layered composites increases with the growth of rolling passes. On the other hand, more rolling passes result in decaying energy release capacity of the Al/Ni multi-layered composites under impact velocity from 800 m/s to 1 500 m/s.
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图 5 准密闭二次撞击反应实验布局图[9]
Figure 5. An experimental layout of double impact initiation experiment
表 1 准密闭二次撞击反应实验结果
Table 1. Experimental results of double impact initiation
Al/Ni材料类型 m/g v/(m·s−1) Δpm/MPa Q/kJ Ek/kJ er/(kJ·g−1) (Δpm $ t_{\rm m}^{-1}$)/(MPa·s−1) 冷轧3道次 2.94 841 0.011 0.97 0.80 0.06 0.42 2.98 872 0.016 1.41 0.89 0.17 0.46 2.59 1 103 0.049 4.31 1.31 1.16 1.58 2.95 1 382 0.081 7.13 2.55 1.55 2.45 2.74 1 406 0.105 9.24 2.44 2.48 3.09 冷轧4道次 2.69 852 0.014 1.23 0.74 0.18 0.54 2.59 1 032 0.024 2.11 1.12 0.38 1.09 2.67 1 064 0.033 2.90 1.25 0.62 1.06 2.79 1 327 0.058 5.10 2.19 1.04 1.76 2.73 1 371 0.087 7.66 2.30 1.96 2.35 冷轧5道次 2.98 854 0.015 1.32 0.81 0.17 0.48 2.90 1 023 0.025 2.20 1.21 0.34 0.81 2.88 1 049 0.028 2.46 1.28 0.41 1.04 2.88 1 419 0.048 4.22 2.60 0.56 1.41 -
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