![]() Need help engineering the metals in your product? We provide metallurgy consulting to help select alloys for components.Īn example of a commonly used phase diagram is the iron-carbon phase diagram, which is used to understand the phases present in steel. They are also used to troubleshoot quality problems. Phase diagrams are useful to metallurgists for selection of alloys with a specific composition and design and control of heat treatment procedures that will produce specific properties. This is important because the properties of a metal component depend on the phases present in the metal. Phase diagrams can be used to predict the phase changes that have occurred in an alloy that has been exposed to a particular heat treatment process. Phase diagrams are graphical representations of the phases present in a particular alloy being held at a particular temperature. The phases present in an alloy depend on the alloy composition and the thermal treatment to which the alloy has been exposed. Want to learn about steel phase diagrams? See our steel metallurgy courses Thus, an alloy with more than one phase can be considered to be a composite material. When they are present together, the strength of the alloy is much greater than for ferrite and the ductility is much better compared to cementite. For example, in carbon steel, ferrite is a relatively soft phase and cementite is a hard, brittle phase. ![]() ![]() Ferrite (white) and cementite (dark) in steel.Įach phase within an alloy has its own distinct physical, mechanical, electrical, and electrochemical properties. ![]()
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March 2023
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