| Autor: |
Choudhuri, Deep, Jannotti, Philip A., Muskeri, Saideep, Shukla, Shivakant, Gangireddy, Sindhura, Mukherjee, Sundeep, Schuster, Brian E., Lloyd, Jeffrey T., Mishra, Rajiv S. |
| Zdroj: |
Journal of Dynamic Behavior of Materials; December 2019, Vol. 5 Issue: 4 p495-503, 9p |
| Abstrakt: |
An AlCoCrFeNi2.1eutectic high entropy alloy (EHEA), comprising of FCC phase and a high volume fraction of plate and irregularly shaped BCC-ordered intermetallic B2 domains, was subjected to normal impact by spherical Tungsten–Carbide projectiles. Depending on projectile velocity, the impacted AlCoCrFeNi2.1plates were partially penetrated (at the lowest velocity of 803 m/s), plugged (intermediate velocity of 1159 m/s), and fully penetrated (highest velocity of 1388 m/s). Electron microscopy was utilized to characterize the residual damage or deformation features in the recovered specimens. Failure in the partially penetrated conditions was dominated by interfacial decohesion at the plate-like B2 and FCC interfaces. At higher velocities where plugging occurred, failure was dominated by crack formation in regions containing adiabatic shear band. These results indicated a transition in failure modes as a function of projectile velocities, where the FCC-B2 microstructure dominate failure at lower velocities, while such microstructural features do not influence dynamic failure at higher velocities. |
| Databáze: |
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