What is a solidus line?
The Solidus Line is the line (or lines) on a phase diagram below which only solid is present. Technically it is “the locus of temperatures below which only solid is stable”. Associated terms: Liquidus, Phase Diagram.
What is solidus and liquidus line?
In particular, the solidus line defines the temperature below which the phases in the diagram are solid, while the liquidus line defines the temperature above which the phases are completely liquid.
What happens at solidus line?
The alloy starts to melt at one temperature called the solidus, and is not completely melted until it reaches a second higher temperature, the liquidus. The solidus is the highest temperature at which an alloy is solid – where melting begins.
What is a solidus projection?
The solidus projection and the isothermal section show one or more three-phase regions, bounded by lines joining pairs of phases co-existing in equilibrium.
What is a solidus temperature?
Definition. In chemistry and geology, a solidus is the set of temperatures below which a substance is completely solid or crystallized. The solidus defines the temperature at which a substance begins to melt, but not necessarily when the substance is completely melted. A solidus may be contrasted with a liquidus.
What is solidus phase diagram?
In chemistry, materials science, and physics, the solidus is the locus of temperatures (a curve on a phase diagram) below which a given substance is completely solid (crystallized).
What are liquidus lines?
The liquidus lines on a phase diagram is the locus of all system states that represent the boundary between a single liquid phase and the two phase (liquid + solid) zones on the diagram.
What is a mushy zone?
Mushy zone is where the melting or solidification actually begins and proceeds, accompanying which the latent heat absorbs or releases. Thus, it is critical for the realization of latent heat storage.
What is solidus and liquidus temperature?
Simply put, liquidus is the lowest temperature at which an alloy is completely liquid; solidus is the highest temperature at which an alloy is completely solid. Pure metals are fluid, and they melt at a single temperature. For example, silver melts at 1761°F (961°C), and copper melts at 1981°F (1083°C).
What is meant by solvus line?
The solvus line represents the locus of solubility limits for the solid solutions in a multicomponent system. For the copper-silver binary system shown two such lines exist, one for the a-phase and one for the b-phase.
What is a solvus line?
In a physical or geochemical system, a solvus is a line (binary system) or surface (ternary system) on a phase diagram which separates a homogeneous solid solution from a field of several phases which may form by exsolution or incongruent melting.
What is enthalpy porosity technique?
3 Enthalpy-porosity approach. The liquid fraction, f, is also related to a major modification of the enthalpy formulation, usually termed the “enthalpy-porosity approach.” The latter is based on an apparent analogy between the partially liquid material in the mushy zone and the fluid flow through a porous medium.
What is aluminium?
Aluminium ( aluminum in American and Canadian English) is a chemical element with the symbol Al and atomic number 13. Aluminium has a density lower than those of other common metals, at approximately one third that of steel. It has a great affinity towards oxygen, and forms a protective layer of oxide on the surface when exposed to air.
What are the microstructures of aluminum-silicon commercial alloys?
Fig. 1 Typical microstructures of hypoeutectic, eutectic, and hypereutectic aluminum-silicon commercial alloys. (a) Hypoeutectic aluminum-silicon alloy (Al-5.7Si, alloy typeA319). Cu, and areas with complex eutectics.
Is there a planar eutectic growth front in high-purity aluminium?
A planar eutectic growth front is observed in the high-purity alloys. The eutectic aluminium has mainly the same crystallographic orientation as the dendrites in the unmodified alloys and the strontium modified high-purity alloy. A more complex eutectic grain structure is found in the strontium modified commercial alloy.
What is eutectic solidification interface in alloys?
In the commercial alloys, the eutectic solidification interface extends in the growth direction and creates a eutectic mushy zone. A planar eutectic growth front is observed in the high-purity alloys.
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