Thermodynamics of binary systems using interaction parameters
01 Oct 1991-Metallurgical and Materials Transactions B-process Metallurgy and Materials Processing Science (Springer Boston)-Vol. 22, Iss: 5, pp 593-605
TL;DR: In this article, a four-parameter equation for determining the excess integral property of a binary system is deduced based on the Maclaurin infinite series, which is expressed separately in the neighborhood of each of the pure components of the system.
Abstract: A four-parameter equation for determining the excess integral property of a binary system is deduced based on the Maclaurin infinite series. The series is expressed separately in the neighborhood of each of the pure components of the system. The components are subjected to appropriate boundary conditions at the various stages of the treatment. The present form of the function is found to be capable of interpreting thermodynamic properties of several relatively weakly interacting binary systems based on the present equation. The infinite dilution parameters compare favorably with the values reported in the literature.
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18 Apr 2018-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this paper, a new high strength copper based alloy (Cu-20%Fe-5% Si) was reported that is designed by accessing submerged liquid miscibility gap of the Cu-Fe system and ternary addition of Si for a hierarchical design of microstructure.
Abstract: In this paper, a new high strength copper based alloy (Cu-20 at%Fe-5 at% Si) in Cu-Fe-Si system is reported that is designed by accessing submerged liquid miscibility gap of the Cu-Fe system and ternary addition of Si for a hierarchical design of microstructure. The alloy was synthesized by suction casting of the melt into a copper mould. This paper further elucidates the sequence of evolution of metastable phases in the microstructure due to non-equilibrium solidification through detailed characterizations of the microstructure of the alloy using transmission electron microscopy. The microstructure containing particles with globular morphology of the Fe-rich DO 3 ordered phase suggests its origin in the liquid state consistent with the expectation of a metastable liquid immiscibility. The solute rejection process during the later stage of solidification and the solid state cooling results in the evolution of Fe rich nano sized fully coherent ordered particles in the Cu-rich matrix. This particular alloy has achieved an excellent mechanical strength both at room temperature and at elevated temperature. The correlations between microstructure and mechanical behavior have been discussed in details.
35 citations
TL;DR: Tungsten inert gas cladding of steel substrate with copper alloy under different processing conditions was investigated in this paper, with the particular emphasis on the influence of cladding current on the conc...
Abstract: Tungsten inert gas cladding of steel substrate with copper alloy under different processing conditions was investigated with the particular emphasis on the influence of cladding current on the conc...
29 citations
01 Aug 2002-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this article, the laser surface alloying of pure copper on high nickel austenitic ductile iron was carried out using a 2 kW continuous wave (CW) CO 2 laser with two processing conditions: laser beam spot size D =5 mm, scanning speed V =2 mm s −1, power density E =1.02×10 4 W cm −2 (condition 1) and D = 2 mm, V =9 mm s−1, 6.37×104 W cm−2(condition 2).
Abstract: Laser surface alloying (LSA) of pure copper on high nickel austenitic ductile iron was carried out using a 2 kW continuous wave (CW) CO 2 laser with two processing conditions: laser beam spot size D =5 mm, scanning speed V =2 mm s −1 , power density E =1.02×10 4 W cm −2 (condition 1) and D =2 mm, V =9 mm s −1 , 6.37×10 4 W cm −2 (condition 2). Microstructure in the alloyed zone was found to consist mainly of primary γ-austenite dendrites and an interdendritic eutectic of γ-austenite and M 7 C 3 carbides with copper wetting the dendritic boundaries. Distribution of the copper in the alloyed zone is fairly uniform across the depth of the pool and the concentration of copper in the alloyed zone highly depends on the power density. Copper spheroidal particles can be observed at the interdendritic boundaries under condition 1, indicating that the melt could be near the metastable miscibility gap and liquid phase separation (LPS) takes place due to rapid solidification. After LSA, hardness of the alloyed zone is considerably higher than before, which is attributed to both precipitation hardening and work hardening caused by the thermal stress.
26 citations
01 Jul 2004-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this paper, a detailed TEM investigation of the cross-section microstructure was carried out using an 8 kW $CO_2$ laser on copper substrate and the formation of micron size Fe-rich globules having $DO_3$ structure within Cu-rich fcc matrix suggests access to a submerged miscibility gap during the laser processing.
Abstract: Laser alloyed layers of Cu–Fe–Al–Si were prepared using an 8 kW $CO_2$ laser on copper substrate and a detailed TEM investigation of the cross-section microstructure was carried out. This paper elucidates on the sequence of evolution of various phases constituting a complex microstructure due to non-equilibrium solidification of the laser alloyed layer. The formation of micron size Fe-rich globules having $DO_3$ structure within Cu-rich fcc matrix suggests access to a submerged miscibility gap during the laser processing. The solute rejection processes during later stages of solidification and solid state cooling result in the evolution of submicron size Cu-rich dispersoids inside the Fe-rich globules and the Fe-rich nanoscale fully coherent precipitates within the surrounding Cu-rich matrix.
25 citations
TL;DR: In this paper, phase diagram of the Ag-Sb-Zn ternary system was investigated experimentally by DTA and SEM-EDS methods and theoretically by CALPHAD method.
25 citations
References
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Book•
01 Jan 1973
TL;DR: A complete revision of the work, Selected Values of Thermodynamic Properties of Metals and Alloys, by Hultgren, Orr, Anderson, and Kelley, published in 1963 by John Wiley and Sons, New York, is presented in this paper.
Abstract: : This volume, together with its companion, Selected Values of Thermodynamic Properties of the Elements, represents a complete revision of the work, Selected Values of Thermodynamic Properties of Metals and Alloys, by Hultgren, Orr, Anderson, and Kelley, published in 1963 by John Wiley and Sons, New York. The work should cover pertinent data available at the date printed on the first page of each system. Inspection will show that many or most of the selected values differ from the 1963 edition; many of the differences are substantial. This shows progress in measurement and, at the same time, hints of uncertainties still present.
2,756 citations
327 citations
TL;DR: In this paper, the authors examined the thermodynamic properties of binary solutions whose excess free energy of solution is given by ΔF = A 1 x 2 y + A 2 xy 2 + RT (x ln x + y ln y) where x and y are the atomic fractions; the model may be termed a sub-regular solution.
201 citations