Nonlinear vibration of Al-Al based high entropy alloy circular sandwich panel

Abstract

Circular sandwich panels were designed with Aluminium being core material, steel and Al-Al-based high entropy alloy (Al-based HEA) as the surface board materials, respectively. The dynamic response and influence of small changes in thickness and inherent properties (poisson ratio and density) of the sandwich panels are investigated by a three-dimensional finite element modeling. The nonlinear vibration of the sandwich panel changes from steady state to multiple-periods-bifurcation and chaotic vibration state by changing the forced excitation frequency, amplitude and the initial conditions. Compared with Al-steel sandwich panel, Al-based HEA sandwich panel has good stability under high excitation frequency. Our research shows that Al-Al HEA has potential advantages to be a aircraft and aerospace sandwich panel candidate.

Structure evolution in undercooled CoCrNi medium entropy alloys by glass fluxing method

“…Since the mixing entropy of the HEA is very high, when the component increases, the high entropy effect enhances the mutual solubility of alloying elements, which inhibits the formation of intermetallic compounds and complex phases, and promotes the appearance of simple solid solutions [5][6][7] . Compared with conventional alloys, HEAs have lots of outstanding properties such as high hardness, good high temperature strength, potential to be thermoelectric materials, great resistance to friction, oxidation, corrosion, evaluation wear and fatigue [3,[8][9][10][11][12][13][14][15][16][17][18][19] . Recently, equiatomic ternary and quaternary high-entropy alloys have also attracted the attention of researchers with the development of the research on high-entropy alloys [21][22] for being model alloys because of the less elements.…”