Ballistic Response of a FCC-B2 Eutectic AlCoCrFeNi2.1 High Entropy Alloy

Ballistic Impact Response of Al0.1CoCrFeNi High‐Entropy Alloy

“…[12] Low-strain-rate response (in the range of 10 À4 -10 À2 s À1 ) has been widely studied for a broad range of HEAs to understand their mechanical behavior and plastic deformation mechanisms. [2,3,13,14] These studies demonstrated that the mechanical properties of HEAs are highly tunable over a wide range by suitable thermomechanical treatment. [14][15][16][17] Deformation of HEAs at medium to high strain rates (in the range of 10 À2 -10 3 s À1 ) using Split-Hopkinson Pressure Bar (SHPB) [2,[18][19][20][21][22] indicated that the mechanism, flow stress, and strain-hardening were significantly dependent on the strain rate.…”

“…High-entropy alloys (HEAs) represent a new class of metallic materials that have emerged as a potential candidate for advanced structural applications due to their promising mechanical properties. [1][2][3][4][5] These alloy systems consist of multiple principal elements in equimolar or near equimolar proportions and form single or multiple solid solution phases depending on the electronegativity difference, atomic size difference, and mixing entropy/enthalpy of the constituent elements. [1,[6][7][8][9][10] They exhibit good physical and mechanical properties such as good fatigue and wear resistance, high strength and hardness, and excellent fracture toughness.…”

“…The strength and toughness of the HEAs can be further improved with small addition of alloying elements . Low‐strain‐rate response (in the range of 10 −4 –10 −2 s −1 ) has been widely studied for a broad range of HEAs to understand their mechanical behavior and plastic deformation mechanisms . These studies demonstrated that the mechanical properties of HEAs are highly tunable over a wide range by suitable thermomechanical treatment .…”

Excellent ballistic impact resistance of Al0.3CoCrFeNi multi-principal element alloy with unique bimodal microstructure

“…These alloys tend to form single or multiple solid solution phases 5 and possess promising physical and mechanical properties such as high strength and ductility, good fracture toughness, high hardness, excellent work hardenability, superior strain rate sensitivity, good fatigue, and wear resistance 6 . Low strain rate (in the range of 10 −4 s −1 –10 −2 s −1 ) and dynamic strain rate (in the range of 10 1 s −1 –10 3 s −1 ) response of HEAs has been extensively studied for the fundamental understanding of their plastic deformation mechanisms 7 – 10 . Previous studies focused on single phase HEAs have demonstrated that the deformation mechanisms, strain hardening, flow stress, and strain rate sensitivity are strongly influenced by the strain rate 11 – 13 , owing to the unique combination of solid solution strengthening, twinning, dislocation mediated plasticity, and stress-induced phase transitions 14 .…”