Details
| Original language | English |
|---|---|
| Pages (from-to) | 426-436 |
| Number of pages | 11 |
| Journal | International journal of fatigue |
| Volume | 30 |
| Issue number | 3 |
| Publication status | Published - Mar 2008 |
| Externally published | Yes |
Abstract
Thermal stability of ultrafine-grained (UFG) interstitial free (IF) steel was investigated in order to establish heat treatments for obtaining recovered and bimodal UFG IF steel microstructures, as part of an effort to further improve the fatigue response of this material. The initial UFG microstructure was obtained using equal channel angular extrusion at room temperature. Microstructural investigations, such as electron backscattering diffraction and transmission electron microscopy, were carried out in order to observe the microstructural evolution due to heat treatment and fatigue. Cyclic tests at room temperature revealed the role of heat treatment and resulting microstructures on the cyclic stress-strain response of the IF steel. We demonstrate that the fatigue performance could be improved significantly with low temperature annealing. The bimodal microstructure, however, is not beneficial to improving fatigue properties of the UFG IF steel. Finally, the stability of the UFG microstructure, and the absence of localized damage during fatigue is associated with the presence of impurities in the IF steel.
Keywords
- Bimodal microstructure, Fatigue, Interstitial-free steel, Recovery, Thermal stability, Ultrafine-grained material
ASJC Scopus subject areas
- Mathematics(all)
- Modelling and Simulation
- Materials Science(all)
- General Materials Science
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
- Engineering(all)
- Industrial and Manufacturing Engineering
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In: International journal of fatigue, Vol. 30, No. 3, 03.2008, p. 426-436.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - The role of heat treatment on the cyclic stress-strain response of ultrafine-grained interstitial-free steel
AU - Niendorf, T.
AU - Canadinc, D.
AU - Maier, H. J.
AU - Karaman, I.
N1 - Funding Information: The authors thank Mr. Sergej Tschumak for his help with the transmission electron microscopy measurements, and Ms. Miriam Sasse and Mr. Hans-Gerd Lambers for their assistance in carrying out the fatigue experiments. The German part of this study was supported by Deutsche Forschungsgemeinschaft, within the Research Unit Program ‘Mechanische Eigenschaften und Grenzflächen ultrafeinkörniger Werkstoffe’. The US part of the work was supported by the National Science Foundation, contract no. CMS 01-34554, Solid Mechanics and Materials Engineering Program, Directorate of Engineering, Arlington, VA.
PY - 2008/3
Y1 - 2008/3
N2 - Thermal stability of ultrafine-grained (UFG) interstitial free (IF) steel was investigated in order to establish heat treatments for obtaining recovered and bimodal UFG IF steel microstructures, as part of an effort to further improve the fatigue response of this material. The initial UFG microstructure was obtained using equal channel angular extrusion at room temperature. Microstructural investigations, such as electron backscattering diffraction and transmission electron microscopy, were carried out in order to observe the microstructural evolution due to heat treatment and fatigue. Cyclic tests at room temperature revealed the role of heat treatment and resulting microstructures on the cyclic stress-strain response of the IF steel. We demonstrate that the fatigue performance could be improved significantly with low temperature annealing. The bimodal microstructure, however, is not beneficial to improving fatigue properties of the UFG IF steel. Finally, the stability of the UFG microstructure, and the absence of localized damage during fatigue is associated with the presence of impurities in the IF steel.
AB - Thermal stability of ultrafine-grained (UFG) interstitial free (IF) steel was investigated in order to establish heat treatments for obtaining recovered and bimodal UFG IF steel microstructures, as part of an effort to further improve the fatigue response of this material. The initial UFG microstructure was obtained using equal channel angular extrusion at room temperature. Microstructural investigations, such as electron backscattering diffraction and transmission electron microscopy, were carried out in order to observe the microstructural evolution due to heat treatment and fatigue. Cyclic tests at room temperature revealed the role of heat treatment and resulting microstructures on the cyclic stress-strain response of the IF steel. We demonstrate that the fatigue performance could be improved significantly with low temperature annealing. The bimodal microstructure, however, is not beneficial to improving fatigue properties of the UFG IF steel. Finally, the stability of the UFG microstructure, and the absence of localized damage during fatigue is associated with the presence of impurities in the IF steel.
KW - Bimodal microstructure
KW - Fatigue
KW - Interstitial-free steel
KW - Recovery
KW - Thermal stability
KW - Ultrafine-grained material
UR - http://www.scopus.com/inward/record.url?scp=36549083596&partnerID=8YFLogxK
U2 - 10.1016/j.ijfatigue.2007.04.015
DO - 10.1016/j.ijfatigue.2007.04.015
M3 - Article
AN - SCOPUS:36549083596
VL - 30
SP - 426
EP - 436
JO - International journal of fatigue
JF - International journal of fatigue
SN - 0142-1123
IS - 3
ER -