scholarly journals Anomalous deformation twinning in coarse-grained Cu in Ag60Cu40 composites under high strain-rate compressive loading

2014 ◽  
Vol 618 ◽  
pp. 254-261 ◽  
Author(s):  
B.P. Eftink ◽  
N.A. Mara ◽  
O.T. Kingstedt ◽  
D.J. Safarik ◽  
J. Lambros ◽  
...  
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Compressive Loading ◽  
Deformation Twinning ◽  
Coarse Grained

Tensile Ductility of Ultra-Fine Grained Copper at High Strain Rate

2010 ◽  
Vol 160-162 ◽  
pp. 260-266 ◽  
Author(s):  
Tao Suo ◽  
Kui Xie ◽  
Yu Long Li ◽  
Feng Zhao ◽  
Qiong Deng
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Testing Machine ◽  
Coarse Grained ◽  
Dislocation Dynamic ◽  
Pressing Method ◽  
Fine Grained ◽  
Angular Pressing ◽  
Split Hopkinson

In this paper, ultra-fine grained copper fabricated by equal channel angular pressing method and annealed coarse grained copper were tensioned under both quasi-static and dynamic loading conditions using an electronic universal testing machine and the split Hopkinson tension bar respectively. The rapture surface of specimen was also observed via a Scanning Electron Microscope (SEM). The experimental results show that the ductility of polycrystalline copper decreases remarkably due to the grain refinement. However, with the increase of applied strain rate, ductility of the UFG-Cu is enhanced. The fracture morphologies also give the evidence of enhanced ductility of UFG-Cu at high strain rate. It is believed the enhanced ductility of UFG materials at high strain rate can be attributed to the restrained dislocation dynamic recovery.

High Strain Rate Superplasticity and Microstructure Evolution in a Coarse-Grained Mg-Gd-Y-Zr Rolled Sheet

2014 ◽  
Vol 900 ◽  
pp. 719-724
Author(s):  
Ying Zheng ◽  
Chang Ping Tang ◽  
Yun Lai Deng
Keyword(s):  
Electron Microscopy ◽  
Dynamic Recrystallization ◽  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Microstructural Analysis ◽  
Alloy Sheet ◽  
Coarse Grained ◽  
Dislocation Slip ◽  
Rolled Sheet

Superplasticity at high deformation rates is desirable in order to make superplastic forming more practical. High strain rate superplastic behavior and microstructure of the rolled Mg-Gd-Y-Zr alloy sheet were investigated. For the purposes, tensile tests at the strain rate of 0.01 s-1were conducted, which revealed that the sheet exhibited elongations of 180%~266%. Post-deforming microstructures were characterized by optical microscopy, scanning electron microscopy and transmission electron microscopy, while crystallographic orientation information was obtained from macro-texture analysis. The results show that the high strain rate superplasticity was attributed to class-I creep accommodated by dynamic recrystallization. It is suggested from microstructural analysis results that the interaction between second phases and dislocation facilitated dynamic recrystallization. The macro-texture at the strain of 0.8 still exhibited some characteristics of the crystal rotation arising from dislocation slip despite the occurrence of DRX.

Ultra-high-strain-rate shearing and deformation twinning in nanocrystalline aluminum

Meccanica ◽  
2014 ◽  
Vol 50 (2) ◽  
pp. 561-574 ◽  
Author(s):  
B. Cao ◽  
N. P. Daphalapurkar ◽  
K. T. Ramesh
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Deformation Twinning ◽  
Nanocrystalline Aluminum

Fracto-mechanoluminescent light emission of EuD4TEA-PDMS composites subjected to high strain-rate compressive loading

2017 ◽  
Vol 26 (8) ◽  
pp. 085006 ◽  
Author(s):  
Donghyeon Ryu ◽  
Nicolas Castaño ◽  
Raj Bhakta ◽  
Jamie Kimberley
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Light Emission ◽  
High Strain ◽  
Compressive Loading

Analytical and experimental studies on mechanical behavior of composites under high strain rate compressive loading

2013 ◽  
Vol 44 ◽  
pp. 246-255 ◽  
Author(s):  
G. Ravikumar ◽  
Jayaram R. Pothnis ◽  
Makarand Joshi ◽  
Kiran Akella ◽  
Santosh Kumar ◽  
...  
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Mechanical Behavior ◽  
High Strain ◽  
Compressive Loading ◽  
Experimental Studies

The high strain-rate fracture behaviors of gray iron under compressive loading

2002 ◽  
Vol 73 (2-3) ◽  
pp. 174-178 ◽  
Author(s):  
Cheng-Hsun Hsu ◽  
Shen-Chih Lee ◽  
Lili Wang ◽  
Xinlog Dong
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Compressive Loading ◽  
Gray Iron ◽  
Fracture Behaviors
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