Cooling Curves – Engineering Notes

Leaving CertificateEngineering

Solvus Line: Shows how much of one material is soluble in another at a certain temperature.

Liquidus Line: Between fully liquid state and beginning of solidification.

Solidus Line: Determines the end of solidification.

Pasty Region: Part Solid, Part liquid.

Solid Solution Alloy: Occurs when two metals are completely soluble in each other.

Eutectic Alloy: Occurs when two metals are soluble in each other in the liquid state but completely insoluble in the solid state.

Partial Solubility: Two metals completely soluble in each other in the liquid state but only partially soluble in each other in the solid state. E.g. lead and tin.

Latent Heat of Fusion: The energy taken from or given to a substance when it changes from liquid to solid to liquid without any change in temperature.

Screen-Shot-2013-05-11-at-19.15.06

Lead vs. Tin cooling curve

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