Abstract
Bake hardening is a phenomenon where freshly generated dislocations get pinned down by the migrating carbon atoms under the influence of temperature employed in paint baking shop. Experimentally, a minimal 2% deformation is given to generate such new dislocations. On the other hand, after bainitic transformation, steel contains a large number of dislocations as well as excess carbon atoms in bainite, a combination of which is capable of producing bake hardening effect. In the current analysis, one grade of transformation induced plasticity aided steel was chosen to study the effect of isothermal bainitic transformation on subsequent bake hardening response, without giving any deformation assuming that the previous treatment would have generated sufficient dislocations which could be pinned down by the migrating carbon atoms under the influence of thermal treatment of the bake hardening process. The final microstructure was characterised by many techniques, using Thermo-Calc, optical microscopy, XRD analysis and 3-DAP. A good agreement was observed amongst all the techniques employed.
| Original language | English |
|---|---|
| Pages (from-to) | 485-494 |
| Number of pages | 10 |
| Journal | Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing |
| Volume | 534 |
| DOIs | |
| Publication status | Published - 1 Feb 2012 |
| Externally published | Yes |
Keywords
- 3-D atom probe
- Bainite
- Bake hardening
- Dilatation
- Dislocation
- XRD
Cite this
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Effect of bainitic transformation on bake hardening in TRIP assisted steel. / Das, S.; Timokhina, I.; Singh, S. B. ; Pereloma, E.; Mohanty, O. N.
In: Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing, Vol. 534, 01.02.2012, p. 485-494.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - Effect of bainitic transformation on bake hardening in TRIP assisted steel
AU - Das, S.
AU - Timokhina, I.
AU - Singh, S. B.
AU - Pereloma, E.
AU - Mohanty, O. N.
PY - 2012/2/1
Y1 - 2012/2/1
N2 - Bake hardening is a phenomenon where freshly generated dislocations get pinned down by the migrating carbon atoms under the influence of temperature employed in paint baking shop. Experimentally, a minimal 2% deformation is given to generate such new dislocations. On the other hand, after bainitic transformation, steel contains a large number of dislocations as well as excess carbon atoms in bainite, a combination of which is capable of producing bake hardening effect. In the current analysis, one grade of transformation induced plasticity aided steel was chosen to study the effect of isothermal bainitic transformation on subsequent bake hardening response, without giving any deformation assuming that the previous treatment would have generated sufficient dislocations which could be pinned down by the migrating carbon atoms under the influence of thermal treatment of the bake hardening process. The final microstructure was characterised by many techniques, using Thermo-Calc, optical microscopy, XRD analysis and 3-DAP. A good agreement was observed amongst all the techniques employed.
AB - Bake hardening is a phenomenon where freshly generated dislocations get pinned down by the migrating carbon atoms under the influence of temperature employed in paint baking shop. Experimentally, a minimal 2% deformation is given to generate such new dislocations. On the other hand, after bainitic transformation, steel contains a large number of dislocations as well as excess carbon atoms in bainite, a combination of which is capable of producing bake hardening effect. In the current analysis, one grade of transformation induced plasticity aided steel was chosen to study the effect of isothermal bainitic transformation on subsequent bake hardening response, without giving any deformation assuming that the previous treatment would have generated sufficient dislocations which could be pinned down by the migrating carbon atoms under the influence of thermal treatment of the bake hardening process. The final microstructure was characterised by many techniques, using Thermo-Calc, optical microscopy, XRD analysis and 3-DAP. A good agreement was observed amongst all the techniques employed.
KW - 3-D atom probe
KW - Bainite
KW - Bake hardening
KW - Dilatation
KW - Dislocation
KW - XRD
UR - http://www.scopus.com/inward/record.url?scp=84856551542&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2011.11.097
DO - 10.1016/j.msea.2011.11.097
M3 - Article
VL - 534
SP - 485
EP - 494
JO - Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing
SN - 0921-5093
ER -