High Strain Rate Response of Al0.7CoCrFeNi High Entropy Alloy: Dynamic Strength Over 2 GPa from Thermomechanical Processing and Hierarchical Microstructure

2018 ◽  
Vol 5 (1) ◽  
pp. 1-7
Author(s):  
S. Gangireddy ◽  
B. Gwalani ◽  
R. Banerjee ◽  
R. S. Mishra
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Thermomechanical Processing ◽  
Dynamic Strength ◽  
High Entropy Alloy ◽  
Hierarchical Microstructure ◽  
High Entropy

Hierarchical nanotwins in Fe27Co24Ni23Cr26 high-entropy alloy subjected to high strain-rate Hopkinson bar deformation

2022 ◽  
pp. 111737
Author(s):  
Tsai-Fu Chung ◽  
Shih-Yuan Lu ◽  
Yo-Shiuan Lin ◽  
You-Lin Li ◽  
Po-Han Chiu ◽  
...  
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Hopkinson Bar ◽  
High Entropy Alloy ◽  
High Entropy

scholarly journals Dynamic Mechanical Properties and Microstructure of an (Al0.5CoCrFeNi)0.95Mo0.025C0.025 High Entropy Alloy

Entropy ◽  
2019 ◽  
Vol 21 (12) ◽  
pp. 1154
Author(s):  
Bingfeng Wang ◽  
Chu Wang ◽  
Bin Liu ◽  
Xiaoyong Zhang
Keyword(s):  
Mechanical Properties ◽  
Shear Band ◽  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Dynamic Mechanical Properties ◽  
High Entropy Alloy ◽  
Face Centered Cubic ◽  
High Entropy ◽  
Dynamic Mechanical

The dynamic mechanical properties and microstructure of the (Al0.5CoCrFeNi)0.95Mo0.025C0.025 high entropy alloy (HEA) prepared by powder extrusion were investigated by a split Hopkinson pressure bar and electron probe microanalyzer and scanning electron microscope. The (Al0.5CoCrFeNi)0.95Mo0.025C0.025 HEA has a uniform face-centered cubic plus body-centered cubic solid solution structure and a fine grain-sized microstructure with a size of about 2 microns. The HEA possesses an excellent strain hardening rate and high strain rate sensitivity at a high strain rate. The Johnson–Cook plastic model was used to describe the dynamic flow behavior. Hat-shaped specimens with different nominal strain levels were used to investigate forced shear localization. After dynamic deformation, a thin and short shear band was generated in the designed shear zone and then the specimen quickly fractured along the shear band.

Effect of Precipitates on Plastic Deformation Behavior of High Entropy Alloy Al0.3CoCrFeNi Under High Strain Rate Loading

2020 ◽  
Vol 143 (2) ◽  
Author(s):  
Prasanta K. Das ◽  
Vishal Kumar ◽  
Prasenjit Khanikar
Keyword(s):  
Plastic Deformation ◽  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Microstructural Analysis ◽  
Dynamics Simulation ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Plastic Deformation Behavior ◽  
Strain Rate Loading

Abstract High entropy alloys (HEAs) are primarily known for their high strength and high thermal stability. These alloys have recently been studied for high strain rate applications as well. HEAs have been observed to exhibit different properties when subjected to different strain rates. Very few published results on HEAs are available for high strain rate loading conditions. In addition, modeling and simulation work of microstructural details, such as grain boundary and precipitates of HEAs have not yet been investigated. However, at an atomistic length scale, molecular dynamics simulation works of HEAs have already been published. In this study, a detailed microstructural analysis of plastic deformation of the material under high strain rate loading has been performed using dislocation density based crystal plasticity finite element modeling. The primary objective is, therefore, to assess the strengthening effects due to precipitates on a particular high entropy alloy Al0.3CoCrFeNi with ultrafine grains having randomly distributed NiAl precipitates.

High strain-rate compressive deformation behavior of the Al0.1CrFeCoNi high entropy alloy

2015 ◽  
Vol 86 ◽  
pp. 598-602 ◽  
Author(s):  
N. Kumar ◽  
Q. Ying ◽  
X. Nie ◽  
R.S. Mishra ◽  
Z. Tang ◽  
...  
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Deformation Behavior ◽  
High Strain ◽  
Compressive Deformation ◽  
High Entropy Alloy ◽  
High Entropy

scholarly journals Ultrahigh high-strain-rate superplasticity in a nanostructured high-entropy alloy

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Nhung Thi-Cam Nguyen ◽  
Peyman Asghari-Rad ◽  
Praveen Sathiyamoorthi ◽  
Alireza Zargaran ◽  
Chong Soo Lee ◽  
...  
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
High Entropy Alloy ◽  
High Entropy

High strain rate compression behaviour of single phase CoCuFeMnNi high entropy alloy

2020 ◽  
Vol 823 ◽  
pp. 153763 ◽  
Author(s):  
Reshma Sonkusare ◽  
Roopam Jain ◽  
Krishanu Biswas ◽  
Venkitanarayanan Parameswaran ◽  
N.P. Gurao
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Single Phase ◽  
High Strain ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Compression Behaviour ◽  
Strain Rate Compression

Effect of High Strain-Rate Thermomechanical Processing on Microstructure and Mechanical Properties of Ti-10V-2Fe-3Al Alloy

2013 ◽  
Vol 845 ◽  
pp. 96-100 ◽  
Author(s):  
Piotr Skubisz ◽  
Marek Packo ◽  
Katarzyna Mordalska ◽  
Tadeusz Skowronek
Keyword(s):  
Mechanical Properties ◽  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Thermomechanical Processing ◽  
Hot Forging ◽  
High Strength ◽  
Processing Route ◽  
Microstructure And Mechanical Properties ◽  
Processed Material

Results of beta forging of titanium alloy Ti-10V-2Fe-3Al and subsequent thermal treatment are presented, with analysis of the effect of the processing route on the final mechanical properties, correlated with microstructure of thermomechanically processed material. Investigation of response to high strain-rate hot-forging of microstructure and mechanical properties is focused on the effect of the strengthening mechanisms in the material after two common manners of deformation typical of that alloy. The effect of deformation conditions on final microstructure and mechanical properties was analyzed in three crucial stages of thermomechanical processing, e.i. after deformation, quenching and aging. In result, conclusions were formulated as for processing conditions promoting high strength and/or ductility.

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