Details
| Original language | English |
|---|---|
| Pages (from-to) | 145-163 |
| Number of pages | 19 |
| Journal | ASTM Special Technical Publication |
| Issue number | 1428 |
| Publication status | Published - 2003 |
| Externally published | Yes |
| Event | hermomechanical Fatigue Behavior of Materials: 4th Volume - Dallas, TX, United States Duration: 7 Nov 2001 → 8 Nov 2001 |
Abstract
An extensive database on the isothermal and thermomechanical fatigue behavior of high-temperature titanium alloy IMI 834 and dispersoid-strengthened aluminum alloy X8019 in SiC particle-reinforced as well as non-reinforced condition was used to evaluate both the adaptability of fracture mechanics approaches to TMF and the resulting predictive capabilities of determining material life by crack propagation consideration. Emphasis was put on the selection of the correct microstructural concepts, then adjusting them using data from independent experiments in order to avoid any sort of fitting. It is shown that the cyclic J-integral (ΔJeff concept) is suitable to predict the cyclic lifetime for conditions where the total crack propagation rate is approximately identical to plain fatigue crack growth velocity. In the case that crack propagation is strongly affected by creep, the creep-fatigue damage parameter DCF introduced by Riedel can successfully be applied. If environmental effects are very pronounced the accelerating influence of corrosion on fatigue crack propagation can no longer implicitly be taken into account in the fatigue crack growth law. Instead, a linear combination of the crack growth rate contributions from plain fatigue (determined in vacuum) and from environmental attack was assumed and found to yield a satisfactory prediction, if the relevant corrosion process is taken into account.
Keywords
- Cyclic life, Environmental damage, Fatigue crack propagation, Fracture mechanics, High-temperature aluminum alloy, High-temperature titanium alloy, IMI 834, Life prediction, Metal matrix composite, Thermomechanical fatigue, X8019
ASJC Scopus subject areas
- Engineering(all)
- General Engineering
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In: ASTM Special Technical Publication, No. 1428, 2003, p. 145-163.
Research output: Contribution to journal › Conference article › Research › peer review
}
TY - JOUR
T1 - Using fracture mechanics concepts for a mechanism-based prediction of thermomechanical fatigue life
AU - Christ, Hans Jürgen
AU - Teteruk, Rostislav
AU - Jung, Arnd
AU - Maier, Hans Jürgen
PY - 2003
Y1 - 2003
N2 - An extensive database on the isothermal and thermomechanical fatigue behavior of high-temperature titanium alloy IMI 834 and dispersoid-strengthened aluminum alloy X8019 in SiC particle-reinforced as well as non-reinforced condition was used to evaluate both the adaptability of fracture mechanics approaches to TMF and the resulting predictive capabilities of determining material life by crack propagation consideration. Emphasis was put on the selection of the correct microstructural concepts, then adjusting them using data from independent experiments in order to avoid any sort of fitting. It is shown that the cyclic J-integral (ΔJeff concept) is suitable to predict the cyclic lifetime for conditions where the total crack propagation rate is approximately identical to plain fatigue crack growth velocity. In the case that crack propagation is strongly affected by creep, the creep-fatigue damage parameter DCF introduced by Riedel can successfully be applied. If environmental effects are very pronounced the accelerating influence of corrosion on fatigue crack propagation can no longer implicitly be taken into account in the fatigue crack growth law. Instead, a linear combination of the crack growth rate contributions from plain fatigue (determined in vacuum) and from environmental attack was assumed and found to yield a satisfactory prediction, if the relevant corrosion process is taken into account.
AB - An extensive database on the isothermal and thermomechanical fatigue behavior of high-temperature titanium alloy IMI 834 and dispersoid-strengthened aluminum alloy X8019 in SiC particle-reinforced as well as non-reinforced condition was used to evaluate both the adaptability of fracture mechanics approaches to TMF and the resulting predictive capabilities of determining material life by crack propagation consideration. Emphasis was put on the selection of the correct microstructural concepts, then adjusting them using data from independent experiments in order to avoid any sort of fitting. It is shown that the cyclic J-integral (ΔJeff concept) is suitable to predict the cyclic lifetime for conditions where the total crack propagation rate is approximately identical to plain fatigue crack growth velocity. In the case that crack propagation is strongly affected by creep, the creep-fatigue damage parameter DCF introduced by Riedel can successfully be applied. If environmental effects are very pronounced the accelerating influence of corrosion on fatigue crack propagation can no longer implicitly be taken into account in the fatigue crack growth law. Instead, a linear combination of the crack growth rate contributions from plain fatigue (determined in vacuum) and from environmental attack was assumed and found to yield a satisfactory prediction, if the relevant corrosion process is taken into account.
KW - Cyclic life
KW - Environmental damage
KW - Fatigue crack propagation
KW - Fracture mechanics
KW - High-temperature aluminum alloy
KW - High-temperature titanium alloy
KW - IMI 834
KW - Life prediction
KW - Metal matrix composite
KW - Thermomechanical fatigue
KW - X8019
UR - http://www.scopus.com/inward/record.url?scp=8844241498&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:8844241498
SP - 145
EP - 163
JO - ASTM Special Technical Publication
JF - ASTM Special Technical Publication
SN - 0066-0558
IS - 1428
T2 - hermomechanical Fatigue Behavior of Materials: 4th Volume
Y2 - 7 November 2001 through 8 November 2001
ER -