skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: A unified inelastic constitutive model for the average engineering response of Grade 91 steel

Abstract

Grade 91 steel has been called out for use in advanced reactor intermediate heat exchangers and other components. The material has good high temperature creep resistance and thermal properties but has a complex microstructure that manifests as cyclic softening, work softening, and tension/compression asymmetry in its engineering mechanical response. We describe a unified viscoplastic model for the deformation of Grade 91 for an expected operating temperature range spanning from room temperature to approximately 650 C. The model transitions from a rate independent response at low temperatures and high strain rates to a rate dependent, unified viscoplastic response at high temperatures and low creep strain rates. The model captures work and cyclic softening in the material through combined isotropic kinematic hardening and captures observed tension/compression asymmetry and related anomalous ratcheting effects through a non-j2 flow term. A particular focus of the model is on capturing the average response of Grade 91 as determined from a wide collection of experimental data at many different temperatures, rather than the response of a single set of experiments at a particular temperature. The final model is suitable for the engineering design of nuclear components via inelastic analysis using the ASME Section III, Division 5 procedures.

Authors:
; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy
OSTI Identifier:
1510505
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Conference
Resource Relation:
Conference: 2018 ASME Pressure Vessels and Piping Conference, 07/15/18 - 07/20/18, Prague, CZ
Country of Publication:
United States
Language:
English

Citation Formats

Messner, M. C., Phan, V. T., and Sham, T. -L. A unified inelastic constitutive model for the average engineering response of Grade 91 steel. United States: N. p., 2019. Web. doi:10.1115/PVP2018-84104.
Messner, M. C., Phan, V. T., & Sham, T. -L. A unified inelastic constitutive model for the average engineering response of Grade 91 steel. United States. doi:10.1115/PVP2018-84104.
Messner, M. C., Phan, V. T., and Sham, T. -L. Tue . "A unified inelastic constitutive model for the average engineering response of Grade 91 steel". United States. doi:10.1115/PVP2018-84104.
@article{osti_1510505,
title = {A unified inelastic constitutive model for the average engineering response of Grade 91 steel},
author = {Messner, M. C. and Phan, V. T. and Sham, T. -L.},
abstractNote = {Grade 91 steel has been called out for use in advanced reactor intermediate heat exchangers and other components. The material has good high temperature creep resistance and thermal properties but has a complex microstructure that manifests as cyclic softening, work softening, and tension/compression asymmetry in its engineering mechanical response. We describe a unified viscoplastic model for the deformation of Grade 91 for an expected operating temperature range spanning from room temperature to approximately 650 C. The model transitions from a rate independent response at low temperatures and high strain rates to a rate dependent, unified viscoplastic response at high temperatures and low creep strain rates. The model captures work and cyclic softening in the material through combined isotropic kinematic hardening and captures observed tension/compression asymmetry and related anomalous ratcheting effects through a non-j2 flow term. A particular focus of the model is on capturing the average response of Grade 91 as determined from a wide collection of experimental data at many different temperatures, rather than the response of a single set of experiments at a particular temperature. The final model is suitable for the engineering design of nuclear components via inelastic analysis using the ASME Section III, Division 5 procedures.},
doi = {10.1115/PVP2018-84104},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {1}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: