Microstructure-informed creep model for 30CrMoNiV11-5 steel

[en] 30CrMoNiV11-5 is a high-strength rotor steel used in turbine shafts, where creep governs long-term performance under elevated temperature and stress. In this work, a physics-based mean-field creep (MFC) framework is developed, in which dislocation populations (mobile, immobile, and boundary) are coupled with precipitate-kinetics inputs and damage evolution arising from precipitate coarsening and cavitation. The precipitate state is obtained from thermo-kinetic simulations based on the alloy heat-treatment history. The model is calibrated against 7 standard creep tests at 550 °C over a stress range of 283–450 MPa. It successfully reproduces the primary–secondary–tertiary creep behaviour, captures the stress dependence of the minimum creep strain rate, and predicts rupture time with good fidelity. The predicted microstructural evolution is consistent with TEM and EBSD observations, and the model allows analysis of the respective roles of intragranular and boundary-related precipitates. The proposed framework provides a mechanism-based approach for creep-life assessment of 30CrMoNiV11-5 and related rotor steels.

Research Center/Unit :

CAREM - Center for Applied Research and Education in Microscopy

Disciplines :

Materials science & engineering
Mechanical engineering
Engineering, computing & technology: Multidisciplinary, general & others

Author, co-author :

Chen, Fan ; Université de Liège - ULiège > Urban and Environmental Engineering ; Université de Liège - ULiège > Département ArGEnCo > Département Argenco : Secteur MS2F

Rojas Ulloa, Carlos Eduardo ; Université de Liège - ULiège > Urban and Environmental Engineering ; Université de Liège - ULiège > Département ArGEnCo > Département Argenco : Secteur MS2F ; Université de Liège - ULiège > Faculté des Sciences Appliquées > Form. doct. sc. ingé. & techn. (archi., gén. civ. - paysage) ; Université de Liège - ULiège > Faculté des Sciences Appliquées > Doct. sc. ingé/ tech. (archi. gén. civ. géol.)

Tchuindjang, Jérôme Tchoufack ; Université de Liège - ULiège > Aérospatiale et Mécanique (A&M) ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Metallic materials for additive manufacturing

Dedry, Olivier ; Université de Liège - ULiège > Aérospatiale et Mécanique (A&M) ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Metallic materials for additive manufacturing

Bharadwaj, Rishabh; University of Oulu > Materials and Mechanical Engineering, Centre for Advanced Steels Research

Somani, Mahesh; University of Oulu > Materials and Mechanical Engineering, Centre for Advanced Steels Research

Mertens, Anne ; Université de Liège - ULiège > Aérospatiale et Mécanique (A&M) ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Metallic materials for additive manufacturing

Habraken, Anne ; Université de Liège - ULiège > Département ArGEnCo > Département Argenco : Secteur MS2F ; Université de Liège - ULiège > Département ArGEnCo ; Université de Liège - ULiège > Urban and Environmental Engineering

Language :

English

Title :

Microstructure-informed creep model for 30CrMoNiV11-5 steel

Publication date :

02 May 2026

Journal title :

Materials and Design

ISSN :

0264-1275

eISSN :

1873-4197

Publisher :

Elsevier BV

Volume :

266

Pages :

116152

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

https://api.elsevier.com/content/article/PII:S0264127526007252?httpAccept=text/xml

European Projects :

HE - 101091912 - AID4GREENEST - AI powereD characterization and modelling for GREEn STeel technology

Funders :

F.R.S.-FNRS - Fonds de la Recherche Scientifique
European Union

Available on ORBi :

since 05 May 2026

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