1. Fig. 1 The form of the thermomechanical treatment, used to study
25°C/s
Temperature
10 °C/s °C
50 °C/s
1800 s
15s
MPa
Stress
4 MPa
Time
Fig. 1 The form of the thermomechanical treatment, used to study
stress-affected bainite.
Fig. 2 Experimentally determined 0.2 % proof strength of the austenite
as a function of test temperature.

2. Fig.3 Chemical and mechanical components of the driving force
-1800
GMECH
-1600
GCHEM
-1400
-1200
Free energy / J mol-1
-1000
-800
-600
-400
Stored energy of bainite
-200
250 C
300 C
350 C
Umemoto
Shipway
et al. [12]
et al. [13]
at 360 C
at 350 C
Fig.3 Chemical and mechanical components of the driving force
for the growth of bainite.

3. (a)
(b)
Fig.4 Change in radial strain associated with the bainite transformation
(a) at various transformation temperatures and (b) as a function of elastic stresses during transformation at 300 ºC.

4. Fig.5 Volume percent of bainite as a function of stress applied during the transformation, and the transformation temperature.
Fig. 6 Transformation kinetics at various transformation temperatures and stresses.

5. in each case. The transformation is at 300 ºC.
4 MPa
200 MPa
HV 777
HV 725
0.5 h
HV 708
HV 644
1 h
HV 579
HV 527
2 h
25m
Fig. 7 Optical micrographs of bainitic microstructure transformed under
the influence of an applied compressive stress. The stress axis is vertical
in each case. The transformation is at 300 ºC.

6. 4 MPa
200 MPa
HV 409
HV 429
350 ºC, 5 h
HV 508
HV 517
300 ºC, 5 h
HV 574
HV 576
250 ºC, 12 h
25m
Fig. 8 Optical micrographs of bainite transformed under the influence of
an applied compressive stress. The stress axis is vertical in each case.

7. (a)
5 m
(b)
5 m
Fig. 9 Typical scanning electron micrographs of bainite transformed under the influence of an applied stress (a) 4 MPa and (b) 200 MPa at 300 °C for 5 hours. The stress axis is vertical in each case.

8. Fig.10 Approximate distribution of bainite sheaf traces with respect
to longitudinal axis of sample.

9. (a)
(b)
20m
Fig.11 Orientation imaging maps of bainite formed at 300 ºC for 5 hours under the influence of an applied compressive stress of (a) 4 MPa and (b) 200 MPa. The stress axis is vertical in each case.