1. Mechanism of the Bainite Transformation

2. body-centred cubic
cubic close-packed

3. DISPLACIVE
RECONSTRUCTIVE

4. 4

5. 5

7. upper bainite
1 µm

8. lower bainite

9. Surface Surface 2
50 µm
Srinivasan & Wayman, 1968

17. Mechanical stabilisation is only possible with displacive transformations.
Mechanical stabilisation never occurs with reconstructive transformations.

22. 50 µm

23. Bhadeshia and Waugh, 1981

25. 1 2
Fe-0.4C wt%
Decarburisation
time / s
500
400
300
Temperature / °C

27. Temperature
Ae3' T' o x
Carbon in austenite

28. s d c r 1

31. Growth is diffusionless.
Strain energy must be accounted for.

35. Oka and Okamoto

36. Ohmori and Honeycombe