Assertion: ductility's form | /r/MadeOf | ε-carbon
Facets:
Source sentences:
text: In the second stage, occurring between 150 °C (302 °F) and 300 °C (572 °F), the retained austenite transforms into a form of lower-bainite containing ε-carbon rather than cementite (archaically referred to as "troostite").