Nanoindentation-Based Finite Element Characterization Method for 25Cr2Ni2MoV Rotor Steel Welded Joints

Guo Sujuan (), Pan Zijian (), Zhao Jian () and Zhu Mingliang ()
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Guo Sujuan: East China University of Science and Technology, Key Laboratory of Pressure System and Safety Ministry of Education
Pan Zijian: East China University of Science and Technology, Key Laboratory of Pressure System and Safety Ministry of Education
Zhao Jian: Tongji University, School of Aerospace Engineering and Applied Mechanics
Zhu Mingliang: East China University of Science and Technology, Key Laboratory of Pressure System and Safety Ministry of Education

A chapter in Data-Driven Methods for Reliability and Safety Engineering: Applications in Industrial Systems, 2026, pp 507-518 from Springer

Abstract: Abstract This investigation employed an integrated methodology combining nanoindentation experiments with finite element modeling to assess localized mechanical characteristics in 25Cr2Ni2MoV rotor steel welded connections. The material parameters characterizing the power-law hardening behavior were determined for distinct regions (weld metal, heat-affected zone, and base metal) through reverse analysis of nanoindentation measurements. These derived constitutive properties were subsequently incorporated into computational models to predict the macroscopic tensile response of welded specimens. Validation against digital image correlation (DIC) tensile testing data revealed strong correspondence between simulated strain distribution patterns and experimental measurements throughout deformation progression. These findings confirm the validity and precision of the nanoindentation-driven parameter identification approach for multi-phase material systems.

Keywords: Welded joint; Nanoindentation; Finite element inverse method; Constitutive model; Local deformation (search for similar items in EconPapers)
Date: 2026
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Persistent link: https://EconPapers.repec.org/RePEc:spr:ssrchp:978-3-032-22873-4_37

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DOI: 10.1007/978-3-032-22873-4_37

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