Mechanisms of high-strain-rate deformation and fracture of fine-grained unalloyed uranium upon explosive loading

2011 ◽  
Vol 111 (4) ◽  
pp. 410-420 ◽  
Author(s):  
E. A. Kozlov ◽  
S. V. Bondarchuk ◽  
Yu. N. Zuev ◽  
S. M. Novgorodtsev
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Explosive Loading ◽  
Fine Grained ◽  
Deformation And Fracture ◽  
High Strain Rate Deformation

scholarly journals In situ TEM observations of high-strain-rate deformation and fracture in pure copper

2020 ◽  
Vol 33 ◽  
pp. 10-16
Author(s):  
T. Voisin ◽  
M.D. Grapes ◽  
T.T. Li ◽  
M.K. Santala ◽  
Y. Zhang ◽  
...  
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Pure Copper ◽  
In Situ Tem ◽  
Deformation And Fracture ◽  
High Strain Rate Deformation

The Dynamic Behavior of Ultra-Fine-Grained Copper Fabricated by Equal Channel Angular Pressing

2010 ◽  
Vol 667-669 ◽  
pp. 891-896
Author(s):  
Yue Cheng Dong ◽  
Igor V. Alexandrov ◽  
Jing Tao Wang
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Equal Channel Angular Pressing ◽  
High Strain ◽  
Maximum Yield ◽  
Coarse Grained ◽  
Static Compression ◽  
Fine Grained ◽  
Angular Pressing ◽  
High Strain Rate Deformation

The high-strain-rate response of ultra-fine-grained (UFG) copper fabricated by equal channel angular pressing (ECAP) has been characterized by Split Hopkinson Pressure Bar (SHPB) test and quasi-static compression test has also been performed for comparison here. In the result of quasi-static tests a maximum yield stress equal to 432 MPa has been reached, at the same time the corresponding value turned out to be 995 MPa after a dynamic loading with the strain rate equal to 1700 s-1. It has been demonstrated that the strain rate sensitivity coefficient (m) has enhanced from 0.026 (coarse-grained copper) to 0.037 (UFG copper). Microstructure has indicated a high dislocation density and deformation twins inside the grains formed after a high-strain-rate deformation, which resulted in a high flow stress. The occurrence of a dynamic recrystallization has also been observed in the UFG copper subjected to high-strain-rate deformation. This has become apparent as an accelerated thermal softening and inherent instability typical for the UFG structure. Absence of adiabatic shear bands pointed out that UFG copper can be subjected to a dynamic impact without any fracture.

scholarly journals Fracture behavior of twin induced ultra-fine grained ZK61 magnesium alloy under high strain rate compression

2019 ◽  
Vol 8 (4) ◽  
pp. 3475-3486 ◽  
Author(s):  
Abdul Malik ◽  
Wang Yangwei ◽  
Cheng Huanwu ◽  
Muhammad Abubaker Khan ◽  
Faisal Nazeer ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
High Strain Rate ◽  
Strain Rate ◽  
Fracture Behavior ◽  
High Strain ◽  
Fine Grained ◽  
Strain Rate Compression

High-strain-rate deformation and comminution of silicon carbide

1998 ◽  
Vol 83 (9) ◽  
pp. 4660-4671 ◽  
Author(s):  
C. J. Shih ◽  
V. F. Nesterenko ◽  
M. A. Meyers
Keyword(s):  
Silicon Carbide ◽  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
High Strain Rate Deformation
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