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

Title: Report on the FY18 Uniaxial Material Model Testing and Key Feature Test Articles Testing of Grade 91

Abstract

This report summarizes the results from experiments performed in FY18 on Gr. 91 steel (heat 30176). The testing of Gr. 91 has technical significance because, currently, it is the only approved material for Class A construction in ASME Section III Division 5 that is strongly cyclic softening. The focus of this investigation is the effect of pre-cyclic loading history on the responses of Gr. 91 under key feature testing with Simplified Model Test (SMT) creep fatigue and two-bar thermal ratchet loading. For the pre-softened SMT, the SMT life reduction ratio was found to be approximately the same as the pre-softening fatigue damage ratio. The pre-softening also affected the ratchet behavior for the SMT specimens. Under the same two-bar thermal ratchet test conditions, the pre-softened specimens showed faster ratchet ting rates or larger accumulated strains than those without pre-softening history. In addition, results from previous uniaxial mechanical tests in support of the viscoplastic material model development for Gr. 91 are summarized, and the new results from thermomechanical testing at high temperature range are reported.

Authors:
 [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1460195
Report Number(s):
ORNL/TM-2018/885
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English

Citation Formats

Wang, Yanli. Report on the FY18 Uniaxial Material Model Testing and Key Feature Test Articles Testing of Grade 91. United States: N. p., 2018. Web. doi:10.2172/1460195.
Wang, Yanli. Report on the FY18 Uniaxial Material Model Testing and Key Feature Test Articles Testing of Grade 91. United States. doi:10.2172/1460195.
Wang, Yanli. Sun . "Report on the FY18 Uniaxial Material Model Testing and Key Feature Test Articles Testing of Grade 91". United States. doi:10.2172/1460195. https://www.osti.gov/servlets/purl/1460195.
@article{osti_1460195,
title = {Report on the FY18 Uniaxial Material Model Testing and Key Feature Test Articles Testing of Grade 91},
author = {Wang, Yanli},
abstractNote = {This report summarizes the results from experiments performed in FY18 on Gr. 91 steel (heat 30176). The testing of Gr. 91 has technical significance because, currently, it is the only approved material for Class A construction in ASME Section III Division 5 that is strongly cyclic softening. The focus of this investigation is the effect of pre-cyclic loading history on the responses of Gr. 91 under key feature testing with Simplified Model Test (SMT) creep fatigue and two-bar thermal ratchet loading. For the pre-softened SMT, the SMT life reduction ratio was found to be approximately the same as the pre-softening fatigue damage ratio. The pre-softening also affected the ratchet behavior for the SMT specimens. Under the same two-bar thermal ratchet test conditions, the pre-softened specimens showed faster ratchet ting rates or larger accumulated strains than those without pre-softening history. In addition, results from previous uniaxial mechanical tests in support of the viscoplastic material model development for Gr. 91 are summarized, and the new results from thermomechanical testing at high temperature range are reported.},
doi = {10.2172/1460195},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {7}
}

Technical Report:

Save / Share: