Creep deformations; Creep properties; Deformation response; Fe-Ni-Cr alloys; High temperature creep; Mean-field; Microstructure evolutions; Primary precipitates; Secondary precipitates; Solid solution hardening; Ceramics and Composites; Materials Science (miscellaneous); Materials Science (all); Mechanics of Materials; Mechanical Engineering; Polymers and Plastics
Abstract :
[en] Abstract: High-temperature creep deformation is often accompanied by microstructure evolution. However, aspects affecting the creep properties of materials such as substructure formation and kinetics of primary and secondary precipitates are not addressed by conventional models. In this work, a microstructure-dependent mean-field model is adapted to predict the non-classical creep deformation response of materials exhibiting solid solution hardening regimes. Numerical novelties include an improved stress-sensitive apparent activation volume for the dislocation glide velocity and a diffusion-based solid solution stress formulation through the internal stresses of the material. An Incoloy 800 H experimental campaign to identify and validate the model combining creep tests and microstructural characterization techniques was performed. Additionally, ex situ thermokinetic simulations on Thermo-Calc® PRISMA module were conducted to recover the physical evolution of precipitates during creep. The numerical predictions are in good agreement with the experimental results for low-stress and high-temperature loadings. The loss of predictability observed at high-stress levels is attributed to a creep mechanism transition. Exact stress and temperature ranges cannot be openly disclosed for confidentiality reasons.
Dedry, Olivier ; Université de Liège - ULiège > Aérospatiale et Mécanique (A&M)
Nguyen-Minh, Tuan; Department of Electromechanical Systems and Metal Engineering, University of Gent, Ghent, Belgium
Kestens, Leo A. I.; Department of Electromechanical Systems and Metal Engineering, University of Gent, Ghent, Belgium
Mertens, Anne ; Université de Liège - ULiège > Aérospatiale et Mécanique (A&M)
Tuninetti, Victor ; Université de Liège - ULiège > Département ArGEnCo ; Department of Mechanical Engineering, University of La Frontera, Temuco, Chile
Duchene, Laurent ; Université de Liège - ULiège > Département ArGEnCo > Analyse multi-échelles dans le domaine des matériaux et structures du génie civil
Habraken, Anne ; Université de Liège - ULiège > Département ArGEnCo > Département Argenco : Secteur MS2F ; Fonds de la recherche scientifique - F.R.S., F.N.R.S., Brussels, Belgium
Language :
English
Title :
Mean-field prediction of transient solid solution hardening creep deformation response in Fe-Ni-Cr alloy
HORIZON EUROPE Global Challenges and European Industrial Competitiveness
Funders :
FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture EU - European Union F.R.S.-FNRS - Fonds de la Recherche Scientifique WBI - Wallonie-Bruxelles International
Funding number :
FRIA B2 40002-1907; FRIA B1 4000-8987
Commentary :
Proof reading issue with version of doi 10.1007/s10853-026-13121-z. Erratum correction in progress. Final correction will be properly informed.
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