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.

scholarly journals A New Set-Up to Investigate Plastic Deformation of Face Centered Cubic Metals in High Strain Rate Loading

2014 ◽  
Vol 8 (2) ◽  
Author(s):  
Ehsan Etemadi ◽  
Jamal Zamani ◽  
Alessandro Francesconi ◽  
Mohammad V. Mousavi ◽  
Cinzia Giacomuzzo
Keyword(s):  
Plastic Deformation ◽  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Face Centered Cubic ◽  
Cubic Metals ◽  
Face Centered ◽  
Set Up ◽  
Strain Rate Loading

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.

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

Microstructure Evolution of Pearlitic Lamella Impacts at Ultra-High Strain Rates

2011 ◽  
Vol 464 ◽  
pp. 619-622
Author(s):  
Yi Xiong ◽  
Tian Tian He ◽  
Fang Yu Zhang ◽  
Ling Feng Zhang ◽  
Feng Zhang Ren
Keyword(s):  
Plastic Deformation ◽  
High Strain Rate ◽  
Strain Rate ◽  
Microstructure Evolution ◽  
High Strain ◽  
Cementite Particle ◽  
Eutectoid Steel ◽  
Strain Rate Loading ◽  
Microduplex Structure ◽  
Lamellar Pearlite

The microstructure evolution of eutectoid steel with lamellar pearlite was investigated by SEM and TEM during ultra-high strain rate loading. The results indicate that ultrafine microduplex structure (ferrite + cementite) with the grain size to sub-micrometer level was observed at the surface of eutectoid steel after single pass ultra-high strain rate loading. Equiaxed ferrite grain was about 0.8 μm and the cementite lamella was spheroidized fully, and the diameter of the cementite particle was about 50 nm. The bent or fractures can occur at the edge of shock wave. Ultra-high strain rate shocking induced severe plastic deformation at the surface of materials and the cementite lamella has better plastic deformation capacity.

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
Sign in / Sign up

Export Citation Format

Share Document