Adiabatic shear deformation behaviors of cold-rolled copper under different impact loading directions

2019 ◽  
Vol 754 ◽  
pp. 330-338 ◽  
Author(s):  
Renke Wang ◽  
Hui Zhang ◽  
Lin Tang ◽  
Jianbo Shao ◽  
Zhu Xiao ◽  
...  
Keyword(s):  
Shear Deformation ◽  
Impact Loading ◽  
Adiabatic Shear ◽  
Deformation Behaviors ◽  
Cold Rolled

EFFECTS OF SAMPLE DIRECTIONS ON DYNAMIC FORCED SHEAR DEFORMATION BEHAVIORS OF COLD-ROLL Cu SHEET

2012 ◽  
Vol 48 (3) ◽  
pp. 315
Author(s):  
Zhiyong CHEN ◽  
Lin TANG ◽  
Congkun ZHAN ◽  
Xuyue YANG
Keyword(s):  
Shear Deformation ◽  
Cold Roll ◽  
Deformation Behaviors

scholarly journals Dynamic Shear Deformation of a Precipitation Hardened Al0.7CoCrFeNi Eutectic High-Entropy Alloy Using Hat-Shaped Specimen Geometry

2020 ◽  
Author(s):  
Bharat Gwalani ◽  
Tianhao Wang ◽  
Abhinav Jagetia ◽  
Sindhura Gangireddy ◽  
Saideep Muskeri ◽  
...  
Keyword(s):  
Shear Deformation ◽  
High Strength ◽  
Shear Loading ◽  
Adiabatic Shear ◽  
Dynamic Strain ◽  
High Entropy Alloy ◽  
Dynamic Shear ◽  
High Entropy ◽  
Structural Applications ◽  
Static Conditions

Lamellar eutectic structure of Al0.7CoCrFeNi high-entropy alloy (HEA) is emerging as a promising candidate for structural applications because of its high strength-ductility combination. The alloy consists of a fine-scale lamellar fcc+B2 microstructure with high flow stresses >1500 MPa under quasi-static conditions. The response to shear loading was not investigated so far. This is the first report on the shear deformation of an eutectic structured HEA and effect of precipitation on shear deformation. The dynamic shear response (DSR) of the eutectic HEA was examined in two microstructural conditions, with and without the presence of L12 precipitates. A split-Hopkinson pressure bar (SHPB) was used to compress the hat-shaped specimens to study the local DSR of the alloy. The adiabatic shear bands (ASBs) in two different microstructural conditions were characterized after deformation at dynamic strain rates. The adiabatic shear localization occurs at low strains for the high strength material, and the eutectic microstructure does not delay cracking. The width of ASBs and the extent of plastic deformation around them has been correlated with the rate of straining. Dynamic recrystallization within ASBs and profuse twinning around it was observed. Local mechanical response of individual lamellae before and after shear deformation was examined using nano-indentation.

DEFORMATION BEHAVIORS OF Zr-BASED BULK METALLIC GLASS UNDER IMPACT INDENTATION

2008 ◽  
Vol 22 (09n11) ◽  
pp. 1775-1782 ◽  
Author(s):  
HYUNG-SEOP SHIN ◽  
SOON-NAM CHANG ◽  
DO KYUNG KIM
Keyword(s):  
Metallic Glasses ◽  
Impact Loading ◽  
Shock Loading ◽  
Shear Bands ◽  
Amorphous Metal ◽  
High Yield ◽  
Spherical Indentation ◽  
Loading Conditions ◽  
Structural Applications ◽  
Deformation Behaviors

Metallic glasses are amorphous meta-stable solids and are now being processed in bulk form suitable for structural applications under impact loading. Bulk metallic glasses have many unique mechanical properties such as high yield strength and fracture toughness, good corrosion and wear resistance that distinguish them from crystalline metals and alloys. However, only a few studies could be found mentioning the dynamic response and damage of metallic glasses under impact or shock loading. In this study, we employed a small explosive detonator for the dynamic indentation to a Zr -based bulk amorphous metal in order to evaluate the damage behavior of bulk amorphous metal under impact or shock loading conditions. Results were compared with those of spherical indentation under quasi-static and impact loading and were discussed. The interface bonded specimen method was adopted in order to observe the subsurface damage, especially the formation of shear bands induced during indentation under different loading conditions.

Influence of Deformation Rate on Overload Performance and Microstructure of Spot Welded Metastable Austenitic Stainless Steel

2011 ◽  
Vol 1296 ◽  
Author(s):  
Wei Liu ◽  
Chuanjing Sun ◽  
Junlei Han ◽  
Qiang Li ◽  
Zhikun Song
Keyword(s):  
Deformation Rate ◽  
Slow Rate ◽  
Fast Rate ◽  
Spot Welds ◽  
Second Stage ◽  
Metastable Austenitic Stainless Steel ◽  
Deformation Behaviors ◽  
Cold Rolled ◽  
Two Stages ◽  
Spot Welded

ABSTRACTTensile-shear overload tests of spot welded cold-rolled 301LN plates deforming with slow and fast rates were carried out. The deformation behaviors of spot welds can be divided into two stages. Loading force with fast deformation rate increased more along with displacement in the first stage, while the force with slow rate increased more in the second stage. 21and 32(v.%) α´-martensite were introduced by failure deformation with fast and slow rates respectively. The hardness under the fracture surfaces was higher than HV400, which was more than two times of their original. The ultimate strengths and fracture energy absorptions of spot welds deforming with slow rate were higher than that with fast rate, especially for spot-welded thicker plates.

Adiabatic shear behaviors in rolled and annealed pure titanium subjected to dynamic impact loading

2017 ◽  
Vol 685 ◽  
pp. 95-106 ◽  
Author(s):  
Lianjun Kuang ◽  
Zhiyong Chen ◽  
Yanghui Jiang ◽  
Zhiming Wang ◽  
Renke Wang ◽  
...  
Keyword(s):  
Impact Loading ◽  
Pure Titanium ◽  
Adiabatic Shear ◽  
Dynamic Impact ◽  
Shear Behaviors ◽  
Dynamic Impact Loading

The Dynamic Mechanical Behavior and Microstructural Evolution of Commercial Pure Titanium

2014 ◽  
Vol 968 ◽  
pp. 7-11
Author(s):  
Tong Bo Wang ◽  
Bo Long Li ◽  
Mian Li ◽  
Ying Chao Li ◽  
Zuo Ren Nie
Keyword(s):  
Microstructural Evolution ◽  
Mechanical Response ◽  
Split Hopkinson Pressure Bar ◽  
Pure Titanium ◽  
Adiabatic Shear ◽  
Hopkinson Pressure Bar ◽  
Dynamic Mechanical ◽  
Cold Rolled ◽  
Average Size ◽  
Pressure Bar

The high strain rate deformation behavior of as-annealed and as-cold rolled pure titanium was inspected by Split Hopkinson Pressure Bar (SHPB). The effect of deformation structure on adiabatic shear behavior in pure titanium was analyzed from the aspect of dynamic mechanical response and microstructural evolution. It was found that the strong {0001} basal texture was formed in as-cold rolled pure titanium. There were Geometrically Necessary Boundaries (GNBs) with spacing of 0.6μm and Incidental Dislocation Boundaries (IDBs) with size of 80nm in one grain. The enhancement of adiabatic shear sensitivity in as-cold rolled titanium was attributed to the deformation induced dislocation boundaries. The core of adiabatic shear band (ASB) was full of fine equiaxed grains with average size of 0.4μm, which was induced by dynamic recrystallization.

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