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2007-12-06 11:13 User A1 420×380× (344464 bytes) Steel phase diagram Iron-carbon phase diagram under atmospheric pressure This diagram is limited by pure iron on the left and by iron carbide on the right. The mains phases are: * α iron: ferrite, ferritic steel * γ iron: austenite, austeniti
The simplest phase diagrams are pressure–temperature diagrams of a single simple substance, such as water. The axes correspond to the pressure and temperature . The phase diagram shows, in pressure–temperature space, the lines of equilibrium or phase boundaries between the three phases of solid , liquid , and gas .
These diagrams are used to represent which types of phase changes will occur in a material as it is cooled at different rates. These diagrams are often more useful than time-temperature-transformation diagrams because it is more convenient to cool materials at a certain rate (temperature-variable cooling), than to cool quickly and hold at a ...
The markings show points where two or more phases can co-exist in equilibrium. At temperatures and pressures away from the markings, there will be only one phase at equilibrium. In the diagram, the blue line marking the boundary between liquid and gas does not continue indefinitely, but terminates at a point called the critical point. As the ...
TTT diagram of isothermal transformations of a hypoeutectoid carbon steel; showing the main components obtained when cooling the steel and its relation with the Fe-C phase diagram of carbon steels. Austenite is slightly undercooled when quenched below Eutectoid temperature. When given more time, stable microconstituents can form: ferrite and ...
In chemistry, the lever rule is a formula used to determine the mole fraction (x i) or the mass fraction (w i) of each phase of a binary equilibrium phase diagram.It can be used to determine the fraction of liquid and solid phases for a given binary composition and temperature that is between the liquidus and solidus line.
Phase diagrams in equilibrium; Phase Equilibria Diagrams, a database for glass; see Glass databases This page was last edited on 29 December 2019, at 18:29 (UTC). ...
Derivative works of this file: Pure iron phase diagram (EN).png This is a retouched picture , which means that it has been digitally altered from its original version. The original can be viewed here: Diagramma di fase del ferro puro.svg : .