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Tempering
The microstructure is resistant to tempering
Techniques: hardness, X-ray diffraction and TEM
Decomposition of austenite and precipitation of carbides eventually to cementite and ferrite
- Evolution of hardness with tempering
- X-ray; volume fractions, measure lattice parameter and calculate C content.
- TEM- characterise microstructure
Notes:
The bainitic structure has been found to be resitant to tempering. The way in which the steels temper can be studied with hardness, XRD and TEM.