What is a Hypoeutectoid alloy?

For a binary alloy system, any alloy that has a concentration of solute that is less than the eutectoid composition, e.g. for plain carbon steels the range of carbon from 0.022 to 0.77 wt\%. …

What are microstructure of eutectoid Hypoeutectoid and hypereutectoid steels obtained under equilibrium conditions?

The equilibrium microstructure of eutectoid steel obtained at room temperature is pearlite (Fig. Pearlite has properties between the soft ductile ferrite and hard brittle cementite. In hypereutectoid steel, the equilibrium microstructure at room temperature contains proeutectoid cementite and pearlite (Fig. 6(d)).

What is the composition of hypereutectoid steel?

Steels are generally classified by carbon content, with hypoeutectoid (below 0.77 wt. \% carbon), eutectoid (at 0.77 wt. \% carbon), or hypereutectoid (above 0.77 wt. \% carbon) steels, each of which has a solid solution of carbon in austenite at high temperature.

What is hypereutectoid steel?

A steel with carbon fraction less than CS = 0.76\% is called a hypoeutectoid steel. It is located left of the eutectoid point in the diagram. Steels with a larger fraction of carbon are called hypereutectoid steels.

Is Cast Iron hypereutectoid?

Just as steels can be divided into hypoeutectoid and hypereutectoid steels, cast iron can be divided into hypoeutectic and hypereutectic cast iron respectively.

What is a hypereutectoid alloy?

A hypereutectoid alloy is a metal composed of two or more metallic elements in which the concentration of solute is greater than that of the eutectoid. In steel, such alloys display lower carbon contents.

What does hypereutectoid mean?

Definition of hypereutectoid : containing the minor component in excess of that contained in the eutectoid.

What is Hypereutectoid cast iron?

In hypereutectic cast iron, only primary cementite with a strip-like structure crystallises out initially during solidification. Due to the associated carbon precipitation from the residual melt, the carbon content there is reduced.