Microstructure-sensitive modeling of high temperature creep in grade-91 alloy

Kumar, M. Arul; Capolungo, Laurent

doi:10.1016/j.ijplas.2022.103411

International Journal of Plasticity

2022

DOI: 10.1016/j.ijplas.2022.103411

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Microstructure-sensitive modeling of high temperature creep in grade-91 alloy

M. Arul Kumar

Laurent Capolungo

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Cited by 17 publications

References 77 publications

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Data-Driven Surrogate Modeling with Microstructure-Sensitivity of Viscoplastic Creep in Grade 91 Steel

Ruybalid,

Tallman,

Wen

et al. 2024

Integr Mater Manuf Innov

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To support the development of advanced steel alloys tailored to withstand extreme conditions, it is imperative to account for the mechanical performance of components, while considering the influence of local microstructure on the macroscopic response. To this end, this study focuses on the development of microstructure-sensitive constitutive models for the mechanical response of Grade 91 steel exposed to extreme thermo-mechanical environments. Polynomial chaos expansion (PCE) surrogates are used to emulate high-fidelity polycrystal simulations of the viscoplastic response of Grade 91 steel as a function of the microstructure fingerprint (e.g., dislocations and precipitates). To cover a wide temperature–stress domain, two separate PCE surrogates—one that captures softening and the other that captures hardening behavior—are combined using another (sparse) Gaussian process regression model. The resulting constitutive creep surrogate model is integrated within the MOOSE finite element framework to simulate the intricate effects of microstructure, in particular MX-phase precipitates, on a component with a graded microstructure. Surrogate sensitivity analysis is applied to quantify the relevant impact of spatially varying microstructure on the creep response in a test-case involving a Grade 91 alloy with a prototypical weld.

show abstract

Data-Driven Surrogate Modeling with Microstructure-Sensitivity of Viscoplastic Creep in Grade 91 Steel

Ruybalid,

Tallman,

Wen

et al. 2024

Integr Mater Manuf Innov

View full text Add to dashboard Cite

show abstract

Revised creep fracture maps of Type 316 stainless steel and their mechanistic perspective

Petkov,

Juan

2024

Engineering Failure Analysis

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Nanoscale deformation of crystalline metals: Experiments and simulations

Pan

et al. 2023

International Journal of Plasticity

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Microstructure-sensitive modeling of high temperature creep in grade-91 alloy

Cited by 17 publications

References 77 publications

Data-Driven Surrogate Modeling with Microstructure-Sensitivity of Viscoplastic Creep in Grade 91 Steel

Data-Driven Surrogate Modeling with Microstructure-Sensitivity of Viscoplastic Creep in Grade 91 Steel

Revised creep fracture maps of Type 316 stainless steel and their mechanistic perspective

Nanoscale deformation of crystalline metals: Experiments and simulations

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