An initial framework for the rapid qualification of long-term creep rupture strength via microstructural modeling

Venkataraman, A.; Messner, Mark C.

doi:10.2172/1814829

Cited by 3 publications

(10 citation statements)

References 14 publications

(19 reference statements)

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“…Microstructural models for long-term material behavior have the potential to provide greater timeextrapolation from short term tests, when compared to empirical approaches [46][47]. These models are often significantly more difficult to develop and calibrate and require significant microstructural characterization to validate.…”

Section: Microstructural Modeling and Characterizationmentioning

confidence: 99%

ASME Code Qualification Plan for LPBF 316 SS

Messner,

Barua,

Huning

et al. 2023

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This report describes a plan to qualify laser powder bed fusion (LPBF) 316 stainless steel for use with the American Society of Mechanical Engineers (ASME) Boiler & Pressure Vessel Code Section III, Division 5 rules for metallic components in high temperature nuclear reactors. Accomplishing this goal would make the material and manufacturing process available to vendors for inclusion in the next generation of advanced, high temperature reactors. The general approach adopted here is to treat LPBF 316 as if it was a completely new material and to develop a plan to qualify the material according to the current ASME practices. One key goal of this work is to explore and develop accelerated qualification approaches that might reduce the time required to qualify new materials by reducing the need for long term testing. However, the qualification plan here does not employ any accelerated qualification approaches to provide a limiting, bounding description of the number, duration, and types of testing required to qualify LPBF 316 without such techniques and to describe a comprehensive dataset that could be used to explore and validate accelerated qualification approaches in the future. The report addresses the fundamental challenges to qualifying Advanced Manufacturing (AM) materials for high temperature applications and summarizes the ASME Section III qualification process as well as current efforts to qualify LBPF and DED 316 for low temperature applications. The report then discusses specific issues, both material and logistical, related to qualifying PBF 316 steel. The final chapters of the report describe a complete test plan designed to generate sufficient data to qualify the material as well as a data management plan for how to store and manage the data to eventually provide the test data packaged needed to qualify the material with ASME.

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Section: Microstructural Modeling and Characterizationmentioning

confidence: 99%

ASME Code Qualification Plan for LPBF 316 SS

Messner,

Barua,

Huning

et al. 2023

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“…The model was originally developed by Hu and Cocks et al in [1] and in Hu's dissertation [2] to model type 316H stainless steel. The model has been implemented in the MOOSE-based CPFE framework in a previous work [3]…”

Section: State-of-the-art Dislocation Creep Formulationmentioning

confidence: 99%

“…The original Hu-Cocks model presented in Section 3.1 was developed under the major assumption that different precipitates do not compete for the same chemical species. This assumption has been justified in the previous study on 316H stainless steel [3], where the concentration of molybdenum (Mo) for the Laves phase and the concentrations of carbon (C) and chromium (Cr) for the carbides are tracked.…”

Section: Precipitation Competition In Alloy 709 Stainless Steelmentioning

confidence: 99%

“…This report documents the development of a physics-based mechanistic model for predicting creep and thermal aging in Alloy 709. The basic framework was developed through the DOE:NE NMDQi program, [3] where the creep of type 316H stainless steel was successfully modeled. That work demonstrated the predictions made by the mechanistic model are more accurate than the classical purely data-driven approaches (e.g., ).…”

Section: Introductionmentioning

confidence: 99%

“…The physics-based approach was proposed in [3] aiming at extending the extrapolation window to reduce the number and duration of creep tests required to qualify a material for a 30 to 60 year life. This model uses the crystal plasticity finite element (CPFE) method to discretize the microstructure of the material and capture key aspects of the material structure.…”

Section: Introductionmentioning

confidence: 99%

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