Details
| Original language | English |
|---|---|
| Pages (from-to) | 712-718 |
| Number of pages | 7 |
| Journal | Zeitschrift fuer Metallkunde/Materials Research and Advanced Techniques |
| Volume | 93 |
| Issue number | 7 |
| Publication status | Published - Jul 2002 |
| Externally published | Yes |
Abstract
The present study identifies key material phenomena that limit the predictive capabilities of current approaches employed in modelling the properties of heat treated components. Focus is on aspects related to the isothermal austenite-to-bainite transformation in low alloy steels. Specifically, experimental data are presented on (i) the stress-strain response of austenite prior to transformation, (ii) the magnitude and progress of transformation plasticity and (iii) the effect of externally applied loads on the kinetics of the bainitic phase transformation. The data obtained demonstrate a substantial stress-induced as well as a strain-induced acceleration of the bainitic transformation, which has to be accounted for in modelling. Moreover, stress-strain response of the supercooled austenite was found to be drastically different from that estimated based on the behaviour of stable austenitic steels. The results also point out that transformation plasticity can contribute significantly to distortion of heat treated components. Still, some of the assumptions widely used in modelling this phenomenon are clearly incompatible with the experimentally obtained data.
Keywords
- Bainite, Low alloy steel, Phase transformation, Stress-strain behaviour, Supercooled austenite, Transformation plasticity
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Condensed Matter Physics
- Chemistry(all)
- Physical and Theoretical Chemistry
- Materials Science(all)
- Metals and Alloys
- Materials Science(all)
- Materials Chemistry
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In: Zeitschrift fuer Metallkunde/Materials Research and Advanced Techniques, Vol. 93, No. 7, 07.2002, p. 712-718.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Isothermal bainitic transformation in low alloy steels
T2 - Factors limiting prediction of the resulting material's properties
AU - Maier, Hans Jürgen
AU - Ahrens, Uwe
PY - 2002/7
Y1 - 2002/7
N2 - The present study identifies key material phenomena that limit the predictive capabilities of current approaches employed in modelling the properties of heat treated components. Focus is on aspects related to the isothermal austenite-to-bainite transformation in low alloy steels. Specifically, experimental data are presented on (i) the stress-strain response of austenite prior to transformation, (ii) the magnitude and progress of transformation plasticity and (iii) the effect of externally applied loads on the kinetics of the bainitic phase transformation. The data obtained demonstrate a substantial stress-induced as well as a strain-induced acceleration of the bainitic transformation, which has to be accounted for in modelling. Moreover, stress-strain response of the supercooled austenite was found to be drastically different from that estimated based on the behaviour of stable austenitic steels. The results also point out that transformation plasticity can contribute significantly to distortion of heat treated components. Still, some of the assumptions widely used in modelling this phenomenon are clearly incompatible with the experimentally obtained data.
AB - The present study identifies key material phenomena that limit the predictive capabilities of current approaches employed in modelling the properties of heat treated components. Focus is on aspects related to the isothermal austenite-to-bainite transformation in low alloy steels. Specifically, experimental data are presented on (i) the stress-strain response of austenite prior to transformation, (ii) the magnitude and progress of transformation plasticity and (iii) the effect of externally applied loads on the kinetics of the bainitic phase transformation. The data obtained demonstrate a substantial stress-induced as well as a strain-induced acceleration of the bainitic transformation, which has to be accounted for in modelling. Moreover, stress-strain response of the supercooled austenite was found to be drastically different from that estimated based on the behaviour of stable austenitic steels. The results also point out that transformation plasticity can contribute significantly to distortion of heat treated components. Still, some of the assumptions widely used in modelling this phenomenon are clearly incompatible with the experimentally obtained data.
KW - Bainite
KW - Low alloy steel
KW - Phase transformation
KW - Stress-strain behaviour
KW - Supercooled austenite
KW - Transformation plasticity
UR - http://www.scopus.com/inward/record.url?scp=0036646427&partnerID=8YFLogxK
U2 - 10.3139/146.020712
DO - 10.3139/146.020712
M3 - Article
AN - SCOPUS:0036646427
VL - 93
SP - 712
EP - 718
JO - Zeitschrift fuer Metallkunde/Materials Research and Advanced Techniques
JF - Zeitschrift fuer Metallkunde/Materials Research and Advanced Techniques
SN - 0044-3093
IS - 7
ER -