Thermo-Physical Properties of Al-Mg Alloy in Liquid State at Different Temperatures

Abstract

Thermo-physical properties of Al-Mg alloys in molten state at 1073 K have been studied using thermodynamic modeling. Thermodynamic properties, such as free energy of mixing, heat of mixing, entropy of mixing, activities and structural properties, such as concentration fluctuation in long wavelength limit, Warren-Cowely short range order parameter have been studied at 1073 K, 1173 K, 1273 K and 1373 K on the basis of regular associated solution model. The surface properties such as surface concentrations and surface tension of the liquid alloys have been studied by using Butler's model. A consistent set of model parameters have also been obtained by using optimization procedure based on statistical thermodynamics. Our analysis reveals that Al-Mg alloy is moderately interacting and it shows ordering nature at 1073 K. The nature of the alloys changes from ordering to segregating as the temperature increases.

Reassessments of thermo-physical properties of Si-Ti melt at different temperatures

“…It corresponds that the compound forming tendency of the liquid alloy gradually decreases at higher temperatures and is found to be most interacting at its melting temperature (2000 K). The similar tendency has been predicted by several researchers in different alloy systems [1,11,16,19,25,26]. (a-c).…”

“…Their results constitute the partial enthalpy and entropy of Si and activity coefficient of Ti in the alloy at 1873 K in the above mentioned concentration range. Further, they presented the expression for the integral excess free energy of mixing (G M XS ) in the form of Redlich-Kister (R-K) [18,19] and structural properties, such as concentration fluctuation in long wavelength limit (S CC (0)), chemical short-range order parameter (α 1 ) and ratio of diffusion coefficients (D M /D id ) of the alloy at different temperatures. Further, the surface properties, such as surface tension (σ) and the extent of surface segregation (x i S ; i = Ti and Si)…”

Assessment of Thermodynamic and Structural Properties of Al–Er liquid Alloy at Different Temperatures

“…The model parameters (∆ω, ∆ω AB and ∆ω AA ) were assumed to depend linearly on temperature. T-dependence of these parameters in terms of ∂∆ω/∂T , ∂∆ω AB /∂T and ∂∆ω AA /∂T can be expressed as [20][21][22]28]…”

Temperature-Dependence of Mixing Properties of Cu-Ti Liquid Alloy

“…As pure constituent metals have less strength than that of the alloy, they are not so useful and significant for applications (Shrivastava et al, 2015). Because of mixing of pure metals at proper proportions and temperatures, the alloy acquires useful properties superior to that of its constituent pure metals like higher tensile strength, lower density, higher corrosion, oxidation and temperature resistance, higher toughness and ductility and more durability (Yadav, Jha, et al, 2018;Yadav, Sharma, et al, 2018). Therefore, alloys are used in wide variety of applications like in buildings, architecture applications, aerospace industries, automobiles, surgical tools, cooking utensils, rigid containers etc.…”

“…Therefore, alloys are used in wide variety of applications like in buildings, architecture applications, aerospace industries, automobiles, surgical tools, cooking utensils, rigid containers etc. (Yadav, Jha, et al, 2018;Yadav, Sharma, et al, 2018).…”