Question

austenite cools and carbon diffuses often transforms into

Answer 1

Behavior in plain carbon-steel. Asaustenite cools, the carbon diffusesout of the austenite and forms carbonrich iron-carbide (cementite) and leaves behind carbon poor ferrite. ... The volume change (martensite is less dense than austenite) which can generate stresses as well.

Answer 2

Austenite frequently transforms into a mixture of ferrite and cementite as the material's dissolved carbon exits solution.

• The alloy composition and cooling rate both influence pearlite formation.
• If the cooling rate is particularly fast, the alloy may go through a martensitic transition, which is a little lattice distortion.
• As the alloy cools, carbon becomes trapped inside the FCC structure, creating crystal strain.
• As a result, hard martensite grows.
• The rate of cooling determines the proportions of these components as well as steel's mechanical properties.