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Published: 25 January 2018
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| Sample | Al | Cr | Co | Fe | Ni | Mo | Ti | Si | | AlCrCoFeNiMoSi | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | AlCrCoFeNiMo-
Ti0.25Si0.75 | 1 | 1 | 1 | 1 | 1 | 1 | 0.25 | 0.75 | AlCrCoFeNiMo-
Ti0.5Si0.5 | 1 | 1 | 1 | 1 | 1 | 1 | 0.5 | 0.5 | AlCrCoFeNiMo-
Ti0.75Si0.25 | 1 | 1 | 1 | 1 | 1 | 1 | 0.75 | 0.25 | | AlCrCoFeNiMoTi | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 |
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Composition of high entropy alloys
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| Lattice
constant
nm | Density
g/cm3 | Cohesive
energy
eV/atom | | AlCrCoFeNiMoSi | 0.279 3 | 8.197 3 | -123.80 | | AlCrCoFeNiMoTi0.25Si0.75 | 0.279 9 | 8.254 1 | -129.77 | | AlCrCoFeNiMoTi0.5Si0.5 | 0.279 9 | 8.361 2 | -139.64 | | AlCrCoFeNiMoTi0.75Si0.25 | 0.280 4 | 8.423 0 | -152.87 | | AlCrCoFeNiMoTi | 0.279 0 | 8.661 1 | -169.98 |
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Lattice constants, density and cohesive energy of high entropy alloys
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| C11/GPa | C12/GPa | C44/GPa | | AlCrCoFeNiMoSi | 73.32 | 119.30 | 87.20 | | AlCrCoFeNiMoTi0.25Si0.75 | 79.48 | 121.79 | 92.10 | | AlCrCoFeNiMoTi0.5Si0.5 | 96.58 | 125.02 | 103.48 | | AlCrCoFeNiMoTi0.75Si0.25 | 88.20 | 122.80 | 104.27 | | AlCrCoFeNiMoTi | 88.86 | 134.91 | 114.61 |
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Elastic constants Cij of high entropy alloys
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| E/GPa | G/GPa | B/GPa | G/B | ν | | AlCrCoFeNiMoSi | -74.46 | -25.98 | 103.98 | -0.25 | 0.62 | | AlCrCoFeNiMoTi0.25Si0.75 | -67.91 | -16.94 | 107.69 | -0.16 | 0.61 | | AlCrCoFeNiMoTi0.5Si0.5 | -44.48 | 5.82 | 115.54 | 0.05 | 0.56 | | AlCrCoFeNiMoTi0.75Si0.25 | -54.74 | -0.97 | 111.27 | -0.01 | 0.58 | | AlCrCoFeNiMoTi | -73.82 | -11.42 | 119.56 | -0.10 | 0.60 |
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The Young’s modulus E,shear modulus G,bulk modulus B,G/B and Poisson’s ratio ν of high entropy alloys
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| AlCrCoFeNiMoTixSiy | x=0,
y=1 | x=0.25,
y=0.75 | x=0.5,
y=0.5 | x=0.75,
y=0.25 | x=1,
y=0 | Average
hardness | | The original sample after melting | 41.5 | 45.5 | 47.0 | 46.4 | 45.6 | 45.2 | | Annealed sample | 50.5 | 52.0 | 48.6 | 52.5 | 51.5 | 51 |
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Hardness of high entropy alloys (HRC)
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The Young’s modulus E, shear modulus G, Poisson’s ratio ν and HRC of high entropy alloys casting
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SEM micrographs of AlCrCoFeNiMoTixSiy high entropy alloys casting: (a)x=0,y=1;(b)x=0.25,y=0.75;(c)x=0.5,y=0.5;(d)x=0.75,y=0.25;(e)x=1,y=0
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2018, Vol. 32 
