Abstract
High temperature creep is often dealt with simplified
models to assess and pre-dict the future behavior of
materials and components. Also, for most applications the
creep properties of interest require costly long-term
testing that limits the available data to support design
and life assessment. Such test data sets are even smaller
for welded joints that are often the weakest links of
structures. It is of considerable interest to be able to
reliably predict and extrapolate long term creep behavior
from relatively small sets of supporting creep data.
For creep strain, the current tools for model
verification and quality assurance are very limited. The
ECCC PATs can be adapted to some degree but the
uncer-tainty and applicability of many models are still
questionable outside the range of data. In this thesis
tools for improving the model robustness have been
devel-oped. The toolkit includes creep rupture, weld
strength and creep strain model-ing improvements for
uniaxial prediction. The applicability is shown on data
set consisting of a selection of common high temperature
steels and the oxygen-free phosphorous doped (OFP)
copper. The steels assessed are 10CrMo9-10 (P22),
7CrWVMoNb9-6 (P23), 7CrMoVTiB10-10 (P24), 14MoV6-3
(0.5CMV), X20CrMoV11-1 (X20), X10CrMoVNb9-1 (P91) and
X11CrMoWVNb9-1-1 (E911).
| Original language | English |
|---|---|
| Qualification | Doctor Degree |
| Awarding Institution |
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| Supervisors/Advisors |
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| Award date | 5 Feb 2010 |
| Place of Publication | Espoo |
| Publisher | |
| Print ISBNs | 978-951-38-7378-3 |
| Electronic ISBNs | 978-951-38-7379-0 |
| Publication status | Published - 2010 |
| MoE publication type | G5 Doctoral dissertation (article) |
Keywords
- creep
- strain
- damage
- modeling
- steel
- OFP copper