The abovementioned diffusion behavior of Al takes place at the temperature near the solidus temperature of the alloy and within a temperature range of 21[degrees]C, which can be obtained by the product of distance of the two sections (5 mm) in the same ingot and the temperature gradient (4.2[degrees]C/mm). At temperatures between the solidus and liquidus the alloy is part solid, part liquid. The solidus temperature quantifies the point at which a material completely solidifies (crystallizes). Temperature may remain constant, or even decrease slightly. The local geotherm intersects the mantle solidus as the pressure decreases, resulting in partial melting. The solidus/liquidus temperatures along with thermal conductivity limit the fuel operating temperature in terms of linear heat rating (W cm −1), and the fuel center which ‘sees’ the highest temperature does not exceed the solidus temperature. In chemistry and geology, a solidus is the set of temperatures below which a substance is completely solid or crystallized. Depending on the angle at which the geotherm intersects the solidus, the degree of melting can be quite high, with as much as 40% of the mantle melting to form basaltic magma. Definition. The liquidus is the temperature at which an alloy is completely melted. The solidus temperature, T S or T sol, specifies the temperature above which a material is completely solid, and the minimum temperature at which a melt can co-exist with crystals in thermodynamic equilibrium. Numerical analysis of hot cracking in laser-hybrid welded tubes The difference between the solidus and liquidus is called the melting range. Consequently low melting phases, like Fe-S (isothermal eutectic solidus temperature of 988[degrees]C [6]) play an important role in the content. Below is a chart that represents how alloys of phosphorus and copper melt. At temperatures between the solidus and liquidus the alloy is part solid, part liquid. The solidus defines the temperature at which a substance begins to melt, but not necessarily when the substance is completely melted. solidus The position of points marking the boundary between complete solid and liquid/solid at equilibrium, in a temperature—composition diagram. Solidus definition is - an ancient Roman gold coin introduced by Constantine (4th century) and used to the fall of the Byzantine Empire (15th century). The heating for recrystallization at temperature lower than solidus temperature achieves, in fact, lower grain size, but the heating up to the semisolid state introduces new mechanisms as coarsening that leads to a bigger grain size, but this new grain is, still, smaller than that produced by EMS [9]. The liquidus is the temperature at which an alloy is completely melted. When any BFM is heated, it will reach a temperature at which it will start to melt. The temperature point below which material is in complete solid state is known as solidus temperature. The liquidus and solidus temperatures do not necessarily coincide; if a gap exists between the liquidus and solidus temperatures, then within that gap, the material consists of solid and liquid phases simultaneously (like a slurry ). Note that in its definition for brazing, it used only 800°F as the defining temperature for brazing. The difference between the solidus and liquidus is called the melting range. Other definition of solidus temperature is that it is the temperature at which a substance begins to melt. 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). First of all, then, let’s define what we mean by the “liquidus” temperature of a BFM. Below is a chart that represents how alloys of phosphorus and copper melt. 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