Enhanced mechanical properties of a CoCrFeNi high entropy alloy by supercooling method

Effect of Ta addition on the structural, thermodynamic and mechanical properties of CoCrFeNi high entropy alloys

“…The XRD measured parameters are also given for comparison. 35,37,55 Good agreement between our calculations and measurements were reached. The deviations from the measurements for fcc structures are about 2.0%, 1.4%, and 0.1%, for x ¼ 0, 0.2 and 0.4, respectively.…”

Mechanical properties and structure of rapidly solidified bulk Fe89−xHf4Ta1Cu1Gd1SixB4 (x=0–15) and Fe74Hf4Ta1Cu1Gd1LaySi15−yB4 (y=7) alloys

“…In this case, tendency to formation of hard intermetallic phases is hindered due to equimolar component quantities that promote solid solubility [19]. For instance, Li et al [20] found 3-times increase in yield strength under compression for CoCrFeNi high entropy alloy, owed to substantial supercooling. Guo et al [21] obtained a refractory high entropy alloy forming bcc-MoNbHfZrTi solid solution with high yield strength of 1.7 GPa measured in compression tests performed at room temperature.…”

Process optimization of high entropy alloys by laser additive manufacturing

“…There are various methods used in optimizing parameters such as; solidification or thermos-mechanical control and heat treatment. 54 The laser additive technique aside from its numerous advantages is also known to cause defects due to internal stresses depending on the phase transformations, cooling and solidification rate, thermal expansion coefficients, and so on. To minimize the defects observed on all samples after the first phase of experiments, preheating the base plates at 400 • C was done before deposition.…”