Details
| Original language | English |
|---|---|
| Pages (from-to) | 2412-2417 |
| Number of pages | 6 |
| Journal | Materials Science and Engineering A |
| Volume | 527 |
| Issue number | 9 |
| Publication status | Published - 17 Dec 2010 |
| Externally published | Yes |
Abstract
The crack growth behavior of a high-manganese austenitic steel, which exhibits the twinning-induced plasticity (TWIP) effect, was investigated under positive stress ratios. An experimental study making use of miniature compact tension (CT) specimens and thorough microstructural analyses including transmission electron microscopy and fracture analyses demonstrated that the microstructural evolution in the plastic zone of the fatigued TWIP CT specimens is substantially different as compared to the monotonic plastic deformation case. Specifically, the twin density in the plastic zone of the CT specimens is very low, leading to the conclusion that the deformation mechanisms depend drastically on the loading conditions. The absence of twinning under cyclic loading in the plastic zone of the CT specimens indicates that even large accumulated plastic strains are not sufficient to cause substantial twinning in the TWIP steel. This lack of hardening preserves the ductile character of the TWIP steel in the plastic zone ahead of the crack tip and provides for a crack growth rate in the Paris regime lower than reported for other high strength steels.
Keywords
- Crack growth, Fatigue, Microstructure, TRIP, Twinning-induced plasticity, TWIP steel
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Materials Science and Engineering A, Vol. 527, No. 9, 17.12.2010, p. 2412-2417.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Fatigue crack growth-Microstructure relationships in a high-manganese austenitic TWIP steel
AU - Niendorf, T.
AU - Rubitschek, F.
AU - Maier, H. J.
AU - Niendorf, J.
AU - Richard, H. A.
AU - Frehn, A.
PY - 2010/12/17
Y1 - 2010/12/17
N2 - The crack growth behavior of a high-manganese austenitic steel, which exhibits the twinning-induced plasticity (TWIP) effect, was investigated under positive stress ratios. An experimental study making use of miniature compact tension (CT) specimens and thorough microstructural analyses including transmission electron microscopy and fracture analyses demonstrated that the microstructural evolution in the plastic zone of the fatigued TWIP CT specimens is substantially different as compared to the monotonic plastic deformation case. Specifically, the twin density in the plastic zone of the CT specimens is very low, leading to the conclusion that the deformation mechanisms depend drastically on the loading conditions. The absence of twinning under cyclic loading in the plastic zone of the CT specimens indicates that even large accumulated plastic strains are not sufficient to cause substantial twinning in the TWIP steel. This lack of hardening preserves the ductile character of the TWIP steel in the plastic zone ahead of the crack tip and provides for a crack growth rate in the Paris regime lower than reported for other high strength steels.
AB - The crack growth behavior of a high-manganese austenitic steel, which exhibits the twinning-induced plasticity (TWIP) effect, was investigated under positive stress ratios. An experimental study making use of miniature compact tension (CT) specimens and thorough microstructural analyses including transmission electron microscopy and fracture analyses demonstrated that the microstructural evolution in the plastic zone of the fatigued TWIP CT specimens is substantially different as compared to the monotonic plastic deformation case. Specifically, the twin density in the plastic zone of the CT specimens is very low, leading to the conclusion that the deformation mechanisms depend drastically on the loading conditions. The absence of twinning under cyclic loading in the plastic zone of the CT specimens indicates that even large accumulated plastic strains are not sufficient to cause substantial twinning in the TWIP steel. This lack of hardening preserves the ductile character of the TWIP steel in the plastic zone ahead of the crack tip and provides for a crack growth rate in the Paris regime lower than reported for other high strength steels.
KW - Crack growth
KW - Fatigue
KW - Microstructure
KW - TRIP
KW - Twinning-induced plasticity
KW - TWIP steel
UR - http://www.scopus.com/inward/record.url?scp=76049086686&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2009.12.012
DO - 10.1016/j.msea.2009.12.012
M3 - Article
AN - SCOPUS:76049086686
VL - 527
SP - 2412
EP - 2417
JO - Materials Science and Engineering A
JF - Materials Science and Engineering A
SN - 0921-5093
IS - 9
ER -