Details
| Original language | English |
|---|---|
| Pages (from-to) | 1946-1955 |
| Number of pages | 10 |
| Journal | Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science |
| Volume | 38 A |
| Issue number | 9 |
| Publication status | Published - Sept 2007 |
| Externally published | Yes |
Abstract
The microstructural stability of ultrafine-grained (UFG) interstitial-free (IF) steel under cyclic loading was investigated. The samples were extracted from material processed along two different equal channel angular extrusion (ECAE) routes (4C and 4E) at room temperature. Low-cycle fatigue tests were carried out in addition to electron and optical microscopy in order to characterize the microstructural evolution induced by cyclic deformation. The results revealed substantial differences in microstructure resulting from different processing routes. Specifically, the volume fraction of high-angle grain boundaries (HAGBs) and low-angle grain boundaries (LAGBs) varied significantly depending on the processing route. The different microstructural characteristics stemming from different ECAE routes expressively influence the fatigue response. Route-4C-processed material displays cyclic softening, while processing along route 4E leads to microstructural stability under cyclic loading. This highly route-dependent trend in the cyclic stress-strain response is attributed to the instability of the LAGBs and stability of HAGBs during cyclic deformation, which is further supported by electron backscattering diffraction results.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Mechanics of Materials
- Materials Science(all)
- Metals and Alloys
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, Vol. 38 A, No. 9, 09.2007, p. 1946-1955.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - On the microstructural stability of ultrafine-grained interstitial-free steel under cyclic loading
AU - Niendorf, T.
AU - Canadinc, D.
AU - Maier, H. J.
AU - Karaman, I.
N1 - Funding Information: The authors thank Mrs. Dorothee Niklasch for her help with the AFM measurements, Mr. Sergej Tschumak for his help with the transmission electron microscopy analysis, and Mr. Felix Rubitschek for his assistance with 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 U.S. 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 - 2007/9
Y1 - 2007/9
N2 - The microstructural stability of ultrafine-grained (UFG) interstitial-free (IF) steel under cyclic loading was investigated. The samples were extracted from material processed along two different equal channel angular extrusion (ECAE) routes (4C and 4E) at room temperature. Low-cycle fatigue tests were carried out in addition to electron and optical microscopy in order to characterize the microstructural evolution induced by cyclic deformation. The results revealed substantial differences in microstructure resulting from different processing routes. Specifically, the volume fraction of high-angle grain boundaries (HAGBs) and low-angle grain boundaries (LAGBs) varied significantly depending on the processing route. The different microstructural characteristics stemming from different ECAE routes expressively influence the fatigue response. Route-4C-processed material displays cyclic softening, while processing along route 4E leads to microstructural stability under cyclic loading. This highly route-dependent trend in the cyclic stress-strain response is attributed to the instability of the LAGBs and stability of HAGBs during cyclic deformation, which is further supported by electron backscattering diffraction results.
AB - The microstructural stability of ultrafine-grained (UFG) interstitial-free (IF) steel under cyclic loading was investigated. The samples were extracted from material processed along two different equal channel angular extrusion (ECAE) routes (4C and 4E) at room temperature. Low-cycle fatigue tests were carried out in addition to electron and optical microscopy in order to characterize the microstructural evolution induced by cyclic deformation. The results revealed substantial differences in microstructure resulting from different processing routes. Specifically, the volume fraction of high-angle grain boundaries (HAGBs) and low-angle grain boundaries (LAGBs) varied significantly depending on the processing route. The different microstructural characteristics stemming from different ECAE routes expressively influence the fatigue response. Route-4C-processed material displays cyclic softening, while processing along route 4E leads to microstructural stability under cyclic loading. This highly route-dependent trend in the cyclic stress-strain response is attributed to the instability of the LAGBs and stability of HAGBs during cyclic deformation, which is further supported by electron backscattering diffraction results.
UR - http://www.scopus.com/inward/record.url?scp=34548633524&partnerID=8YFLogxK
U2 - 10.1007/s11661-007-9154-1
DO - 10.1007/s11661-007-9154-1
M3 - Article
AN - SCOPUS:34548633524
VL - 38 A
SP - 1946
EP - 1955
JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
SN - 1073-5623
IS - 9
ER -