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Evaluation of T91 after 130,000 hours in service

Description: Two superheater tubes fabricated from T91 were removed for evaluation after 130,000 hours service. Regions of interest included a hot section that replaced type 321 stainless steel, dissimilar welds to type 321 stainless steel safe ends, and cold bends. The evaluation consisted of metallography, transmission electron microscopy (TEM) and precipitate analysis, hardness, tensile properties, creep, and stress rupture. Observed microstructure and properties of the tubing were compared with results … more
Date: March 1, 1998
Creator: Swindeman, R. W.; Sikka, V. K.; Maziasz, P. J. & Canonico, D. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Neutron irradiation effects on the ductile-brittle transition of ferritic/martensitic steels

Description: Ferritic/martensitic steels such as the conventional 9Cr-1MoVNb (Fe-9Cr-1Mo-0.25V-0.06Nb-0.1C) and 12Cr-1MoVW (Fe-12Cr-1Mo-0.25V-0.5W-0.5Ni-0.2C) steels have been considered potential structural materials for future fusion power plants. The major obstacle to their use is embrittlement caused by neutron irradiation. Observations on this irradiation embrittlement will be reviewed. Below 425-450{degrees}C, neutron irradiation hardens the steels. Hardening reduces ductility, but the major effect is… more
Date: June 1, 1997
Creator: Klueh, R.L. & Alexander, D.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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