Thermodynamic description of the Fe–Cu–C system
Source abstract
Abstract
Abstract As an addition to the iron-carbon alloys to improve their strength and corrosion resistance, copper is of great importance for iron and steel industry and the Fe–Cu–C system has been extensively investigated. Aiming at a thermodynamic basis to investigate the effect of Cu addition on the Fe–C system, the CALPHAD (CALculation of PHAse Diagrams) approach was utilized to assess the ternary Fe–Cu–C system including the binary Cu–C and Fe–C systems. The Redlich-Kister model, instead of the Modified Quasichemical Model (MQM) in previous work, was used to model the liquid phase. The parameters of the liquid phase in the Fe–C system from previous work have been slightly modified to fit better with new experimental data at high temperatures. One Fe/Cu/FeC0.05 (in wt%) diffusion couple was designed to further determine the phase equilibria of the ternary system. A set of self-consistent parameters for the Fe–Cu–C system was obtained after thermodynamic optimization. Good correspondence between calculated and experimental values of phase diagrams, thermodynamic properties, and liquidus projections has been achieved by the present thermodynamic description.
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Research context
OpenAlex topics: Metallurgical Processes and Thermodynamics · Powder Metallurgy Techniques and Materials · Microstructure and Mechanical Properties of Steels
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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