Predicting the creep-rupture lifetime of a cast austenitic stainless steel using Larson-Miller and Wilshire parametric approaches

Santella, Michael L.; Tortorelli, Peter F.; Render, Mark; Wang, Hong; Lach, Timothy; Pint, Bruce A.; Maziasz, Philip J.; Cedro III, Vito; Chen, Xiang (Frank)

doi:10.1016/j.ijpvp.2023.105006

Predicting the creep-rupture lifetime of a cast austenitic stainless steel using Larson-Miller and Wilshire parametric approaches

Journal Article · Thu Jun 22 00:00:00 EDT 2023 · International Journal of Pressure Vessels and Piping

DOI:https://doi.org/10.1016/j.ijpvp.2023.105006· OSTI ID:1987793

Santella, Michael L. ^[1]; ^[1]; Render, Mark ^[2]; ^[3]; ^[3]; ^[3]; Maziasz, Philip J. ^[1]; Cedro III, Vito ^[2]; ^[3]

Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
National Energy Technology Lab. (NETL), Morgantown, WV (United States)
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division

An experimental dataset of just over 100 creep tests of a cast austenitic stainless steel, CF8C-Plus, was analyzed by two temperature-compensated parametric models (Larson-Miller, Wilshire et al.) to predict long-term lifetimes as functions of temperature and stress. The dataset and associated regression analyses showed greater scatter than typically found in recent similar studies of wrought Ni-based alloys by the same two models and was attributed to the microstructural inhomogeneity of the cast stainless steel. Qualitatively, the Larson-Miller formalism showed greater lifetime prediction accuracy than the Wilshire approach, with the latter model's predictive ability being particularly degraded by the presence of two very significant outlier results. This observation suggests that the Larson-Miller approach is more robust when treating rupture-time datasets that show particularly wide experimental scatter. Despite the differences in the overall predictive ability, both models yielded similar predictions of the applied stress at which CF8C-Plus would have a creep-limited lifetime of 100,000 h when loaded below the yield point.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Fossil Energy and Carbon Management (FECM)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1987793

Journal Information:: International Journal of Pressure Vessels and Piping, Journal Name: International Journal of Pressure Vessels and Piping Vol. 205; ISSN 0308-0161

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Related Subjects

36 MATERIALS SCIENCE
CF8C-Plus
Larson-Miller approach
Wilshire model
cast stainless steel
creep lifetime prediction
creep-rupture experimental data

Predicting the creep-rupture lifetime of a cast austenitic stainless steel using Larson-Miller and Wilshire parametric approaches

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