The following is a simple definition of Retained Austenite (RA).
Retained austenite is defined as “that fraction of austenite which remains untransformed (to martensite) at the end of quenching.”
It is encountered in certain alloy steels, ball bearing steels, tool steels and carburised parts.
RA can be desirable in certain applications and can be detrimental in many other applications. Therefore it is important to measure and monitor RA.
In our forthcoming blogs, we will dwell on the methods of measuring the % RA, what causes Retained Austenite and how to reduce the % RA after it has formed.
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