The role of entropy and enthalpy plays an essential key for the formation of an alloy. This paper illustrates how an alloy is to form and what and why the properties of the alloy are going to have by the entropy and enthalpy effects via a designed enthalpy-entropy plane (EE-plane) based on the Gibbs free energy equation and the introducing a charactering pseudo-unitary lattice (PUL) for entropy alloys. Based on the PUL scheme, the so-called four effects in high entropy alloys are simply nothing but the entropy effect with the other three accompanying effects: the distortion, slow diffusion and cocktail effects.
References
[1]
Chen, S.-K. (2005) Materials Technology Hsinchu Conference between Two Tsing Hua Universities across Beijing and Hsinchu.
[2]
Chen, S.-K., Lee, P.-H. and Lin, C.H. (2017) AlCoCrFeNiTi and Its Equal-Molar Five-Component Alloys in a Metal Mixological Enthalpy-Entropy Plane. Quarterly Physics Review, 3, 1-28.
