About: Precipitate microstructure evolution in low-cycle fatigued INCONEL superalloys     Goto   Sponge   Distinct   Permalink

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  • The critical parts of a turbine made of Ni-base superalloy are subjected to cyclic elasticplastic straining as a result of heating and cooling during start-up and shut-down periods. Consequently, low-cycle fatigue up to working temperature of 900°C is an important factor in the service life. It is connected with a change of microstructure of matrix and precipitates. Nickel base superalloy Inconel was studied after low-cycle fatigue by exand in-situ SANS. It was found that additional precipitation occurs at 700°C. The precipitates are created regardless the application of the mechanical load. Nevertheless, these small precipitates could influence low-cycle fatigue parameters, as indicated by the anomaly at the same temperature. The small (up to 10 nm at 700°C) precipitates are highly probably not a second population of γ´. Possible explanations are carbides or TCP phase. The limits of the precipitate phase temperature range were roughly determined.
  • The critical parts of a turbine made of Ni-base superalloy are subjected to cyclic elasticplastic straining as a result of heating and cooling during start-up and shut-down periods. Consequently, low-cycle fatigue up to working temperature of 900°C is an important factor in the service life. It is connected with a change of microstructure of matrix and precipitates. Nickel base superalloy Inconel was studied after low-cycle fatigue by exand in-situ SANS. It was found that additional precipitation occurs at 700°C. The precipitates are created regardless the application of the mechanical load. Nevertheless, these small precipitates could influence low-cycle fatigue parameters, as indicated by the anomaly at the same temperature. The small (up to 10 nm at 700°C) precipitates are highly probably not a second population of γ´. Possible explanations are carbides or TCP phase. The limits of the precipitate phase temperature range were roughly determined. (en)
Title
  • Precipitate microstructure evolution in low-cycle fatigued INCONEL superalloys
  • Precipitate microstructure evolution in low-cycle fatigued INCONEL superalloys (en)
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  • Precipitate microstructure evolution in low-cycle fatigued INCONEL superalloys
  • Precipitate microstructure evolution in low-cycle fatigued INCONEL superalloys (en)
skos:notation
  • RIV/68081723:_____/12:00389035!RIV13-GA0-68081723
http://linked.open...avai/predkladatel
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  • I, P(GAP204/11/1453)
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  • 160936
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  • RIV/68081723:_____/12:00389035
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  • Ni-base superalloy; low-cycle fatigue; neutron diffraction (en)
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http://linked.open...ontrolniKodProRIV
  • [02BC942A871A]
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  • Sydney
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  • Sydney
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  • SAS 2012 - Proceedings of the 15th International Small-Angle Scattering Conference
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  • Petrenec, Martin
  • Strunz, Pavel
  • Gasser, U.
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number of pages
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  • SAS Conference
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  • 1-921268-15-8
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