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2021 (English)In: International Journal of Fatigue, ISSN 0142-1123, E-ISSN 1879-3452, Vol. 142Article in journal (Refereed) Published
Abstract [en]
Crack closure effects are known to have a large impact on crack growth behaviour. In this work, tests were performed on Inconel 792 specimens under TMF loading conditions at 100–850 °C with extended hold times at tensile stress. The effective stress-intensity range was estimated experimentally using a compliance-based method leading to the conclusion that crack closure appears to have a primary impact on the crack growth behaviour for this material under the conditions studied. The crack closure behaviour for the tests was successfully modelled using numerical simulations, including creep.
Place, publisher, year, edition, pages
Elsevier, 2021
Keywords
Crack propagation, Inconel 792, Thermomechanical fatigue, Turbine blade, Crack closure, Compliance, Node release
National Category
Applied Mechanics
Identifiers
urn:nbn:se:liu:diva-170273 (URN)10.1016/j.ijfatigue.2020.105917 (DOI)000591564100006 ()
Funder
Swedish Energy Agency
Note
Ytterligare forskningsfinansiär: Siemens Industrial Turbomachinery AB through “Turbines for Future Energy Systems” (Turbiner för framtidens energisystem), Grant No. 44100-1
2020-10-072020-10-072022-05-17Bibliographically approved