Elastic and plastic properties of as-cast equimolar TiHfZrTaNb high-entropy alloy

Elastic properties of as-cast TiHfZrTaNb high entropy alloy were investigated by ultrasound measurements, yielding G=C44=28 GPa and C11=172 GPa effective isotropic elastic constants, allowing computation of the Young’s modulus E, the bulk modulus B and Poisson ratio ν of about 78.5 GPa, 134.6 GPa and 0.402, respectively. A Pugh ratio G/B as lower as 0.208 and high positive Cauchy pressure (C12–C44)=80 GPa were calculated, suggesting a ductile...