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首页> 外文期刊>Combustion, Explosion, and Shock Waves >Fabrication of Nanocrystalline Copper by Explosive Loading and Its Dynamic Mechanics Properties
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Fabrication of Nanocrystalline Copper by Explosive Loading and Its Dynamic Mechanics Properties

机译：爆炸载荷制备纳米晶铜及其动态力学性能

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摘要

Nanocrystalline (NC) copper is fabricated by the method of severe plastic deformation of coarse-grained copper under explosive dynamic loading at high strain rates. The dynamic mechanical properties of NC copper are studied by the split Hopkinson pressure bar method. The results show that it is feasible to fabricate nanocrystalline copper by explosive dynamic plastic deformation of coarse-grained copper and the grain size of NC copper can be smaller than 100 nm. Twinning and formation of dislocations are the main mechanisms of grain refining. The dynamic yield strength of NC copper increases with decreasing average grain size and increasing strain rate.
机译：纳米晶（NC）铜是通过在高应变速率下爆炸性动态载荷下粗晶粒铜的剧烈塑性变形的方法制成的。采用分裂霍普金森压力棒法研究了数控铜的动态力学性能。结果表明，通过粗粒铜爆炸动态塑性变形制备纳米晶铜是可行的，NC铜的晶粒尺寸可以小于100 nm。孪晶和位错的形成是晶粒细化的主要机理。 NC铜的动态屈服强度随着平均晶粒尺寸的减小和应变率的增加而增加。

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