Volume 9: Mechanics of Solids, Structures and Fluids 2015
DOI: 10.1115/imece2015-53341
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Elucidation of the High Cycle Fatigue Damage Mechanism of Modified 9Cr-1Mo Steel at Elevated Temperature

Abstract: Modified 9Cr-1Mo steel is one of the heat-resistant steels developed for steam generator in a FBR (Fast Breeder Reactor). When it is used in a FBR, the lifetime of the steel under HCF (High Cycle Fatigue) and V-HCF (Very-High Cycle Fatigue) caused by flow-induced vibration has to be considered for assuring its long-term reliability up to 1011 cycles. Since previous studies showed that the fatigue limit did not appear up to 108 cycles, it is necessary to investigate the fatigue strength of this alloy in cycles … Show more

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Cited by 4 publications
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“…Since the operating temperature of thermal power plants has been increasing continuously for minimizing the emission of carbon-dioxide gas, it is very important to assure the strength and reliability of this steel at elevated temperatures. The fatigue strength of this steel, however, was found to decrease monotonically with the increase of temperature and the fatigue limit did not appear up to 10 8 cycles at temperatures higher than 500ºC [6]. This disappearance of the fatigue limit makes it difficult to assure the long-term reliability of the structure made of this steel used in various power plants.…”
Section: Introductionmentioning
confidence: 87%
“…Since the operating temperature of thermal power plants has been increasing continuously for minimizing the emission of carbon-dioxide gas, it is very important to assure the strength and reliability of this steel at elevated temperatures. The fatigue strength of this steel, however, was found to decrease monotonically with the increase of temperature and the fatigue limit did not appear up to 10 8 cycles at temperatures higher than 500ºC [6]. This disappearance of the fatigue limit makes it difficult to assure the long-term reliability of the structure made of this steel used in various power plants.…”
Section: Introductionmentioning
confidence: 87%