Details
| Original language | English |
|---|---|
| Pages (from-to) | 9-17 |
| Number of pages | 9 |
| Journal | Materials at high temperatures |
| Volume | 19 |
| Issue number | 1 |
| Publication status | Published - 2002 |
| Externally published | Yes |
Abstract
In the present study five different widely used life models were modified to allow for life prediction under thermomechanical fatigue (TMF) loading conditions. In order to assess the predictive capabilities of the models, life prediction results were compared with TMF data obtained on a stainless steel and a SiC particular reinforced aluminium alloy. The analysis of the data obtained demonstrated that TMF tests are not sufficient per se to evaluate a life model. It is emphasised that TMF tests chosen for validation of life models should be conducted under loading conditions such that coupling effects between the various damage mechanisms become apparent. The data analysed indicate that appropriate TMF test conditions can be estimated for the case of creep-affected damage evolution. By contrast, selection of test conditions that would clearly reveal other potential couplings, say between oxidation and plasticity, is less straightforward. Unless the tests used to validate a model are designed to account for such effects, non-conservative life prediction may result for actual components despite a seemingly excellent correlation of model predictions with experimentally obtained life data.
Keywords
- Creep-fatigue, Damage evolution, Environmental degradation, High-temperature fatigue, Life prediction, Oxidation, Thermomechanical fatigue
ASJC Scopus subject areas
- Materials Science(all)
- Ceramics and Composites
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
- Materials Science(all)
- Metals and Alloys
- Materials Science(all)
- Materials Chemistry
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In: Materials at high temperatures, Vol. 19, No. 1, 2002, p. 9-17.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Modelling thermomechanical fatigue life
AU - Maier, H. J.
AU - Teteruk, R. G.
AU - Christ, H. J.
PY - 2002
Y1 - 2002
N2 - In the present study five different widely used life models were modified to allow for life prediction under thermomechanical fatigue (TMF) loading conditions. In order to assess the predictive capabilities of the models, life prediction results were compared with TMF data obtained on a stainless steel and a SiC particular reinforced aluminium alloy. The analysis of the data obtained demonstrated that TMF tests are not sufficient per se to evaluate a life model. It is emphasised that TMF tests chosen for validation of life models should be conducted under loading conditions such that coupling effects between the various damage mechanisms become apparent. The data analysed indicate that appropriate TMF test conditions can be estimated for the case of creep-affected damage evolution. By contrast, selection of test conditions that would clearly reveal other potential couplings, say between oxidation and plasticity, is less straightforward. Unless the tests used to validate a model are designed to account for such effects, non-conservative life prediction may result for actual components despite a seemingly excellent correlation of model predictions with experimentally obtained life data.
AB - In the present study five different widely used life models were modified to allow for life prediction under thermomechanical fatigue (TMF) loading conditions. In order to assess the predictive capabilities of the models, life prediction results were compared with TMF data obtained on a stainless steel and a SiC particular reinforced aluminium alloy. The analysis of the data obtained demonstrated that TMF tests are not sufficient per se to evaluate a life model. It is emphasised that TMF tests chosen for validation of life models should be conducted under loading conditions such that coupling effects between the various damage mechanisms become apparent. The data analysed indicate that appropriate TMF test conditions can be estimated for the case of creep-affected damage evolution. By contrast, selection of test conditions that would clearly reveal other potential couplings, say between oxidation and plasticity, is less straightforward. Unless the tests used to validate a model are designed to account for such effects, non-conservative life prediction may result for actual components despite a seemingly excellent correlation of model predictions with experimentally obtained life data.
KW - Creep-fatigue
KW - Damage evolution
KW - Environmental degradation
KW - High-temperature fatigue
KW - Life prediction
KW - Oxidation
KW - Thermomechanical fatigue
UR - http://www.scopus.com/inward/record.url?scp=0038094152&partnerID=8YFLogxK
U2 - 10.1179/mht.2002.19.1.002
DO - 10.1179/mht.2002.19.1.002
M3 - Article
AN - SCOPUS:0038094152
VL - 19
SP - 9
EP - 17
JO - Materials at high temperatures
JF - Materials at high temperatures
SN - 0960-3409
IS - 1
ER -