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Low cycle fatigue tests of surface modified T91 steel in 10 wt% oxygen containing Pb45Bi55 at 550 °C |
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| Authors: | A. Weisenburger,A. Heinzel,G. Mü ller,A.D. Kastanov |
| Affiliation: | a Forschungszentrum Karlsruhe GmbH, Institut für Hochleistungsimpuls-und Mikrowellentechnik, (IHM) Postfach 3640, 76021 Karlsruhe, Germany b Forschungszentrum Karlsruhe GmbH, Nukleare Sicherheitsforschung, Postfach 3640, 76021 Karlsruhe, Germany c CRISM PROMETEY, 193015 St. Petersburg, Russia |
| Abstract: | Low cycle fatigue tests in air and LBE containing 10−6 wt% dissolved oxygen were conducted with T91 steel at 550 °C. T91 was employed in two modifications, one in the as-received state, and the other after alloying FeCrAlY into the surface by pulsed electron beam treatment (GESA process). Tests were carried out with symmetrical cycling (R = −1) with a frequency of 0.5 Hz and a total elongation Δεt/2 between 0.3% and 2%. No influence from LBE on fatigue could be detected. Results in air and LBE showed similar behaviour. Additionally, no difference was observed between surface treated and none treated T91 specimens. |
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