材料科学
位错
休克(循环)
凝聚态物理
Crystal(编程语言)
GSM演进的增强数据速率
变形(气象学)
相变
临界切应力
相(物质)
部分位错
单晶
冲击波
压力(语言学)
结晶学
剪切(地质)
复合材料
机械
化学
物理
内科学
粘度
哲学
电信
医学
剪切速率
有机化学
程序设计语言
语言学
计算机科学
作者
K. Vijay Reddy,Chuang Deng,Snehanshu Pal
摘要
In general, shock wave deformation studies of perfect single crystals may cause disagreement with the experimental findings as the complete elimination of all defects in the metallic system is not possible in reality. Here, we have studied the influence of edge and screw dislocations on the intensification of damage produced during the propagation of shock at various velocities. Various analyses have been performed such as common neighbor analysis, atomic strain analysis, stress analysis, and kinetic energy mapping to investigate the underlying plastic deformation mechanisms. Results have revealed that the presence of edge dislocations has caused intensified damage through localized amorphization and phase transition. In comparison with the perfect crystal, the presence of pre-existing edge dislocations has incurred an additional damage of ∼17% to the specimen region. On the other hand, the presence of screw dislocations in the specimen causes damage through shear bands and dislocation loop formation, which is found to constitute greater than 80% of the specimen region.
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