Characterization of Strain-Induced Precipitation in Inconel 718 Superalloy

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URI: https://hdl.handle.net/11556/3548
ISSN: 1059-9495
DOI: 10.1007/s11665-016-2154-9
Publication date
2016-08-01
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Abstract
Inconel 718 presents excellent mechanical properties at high temperatures, as well as good corrosion resistance and weldability. These properties, oriented to satisfy the design requirements of gas turbine components, depend on microstructural features such as grain size and precipitation. In this work, precipitation-temperature-time diagrams have been derived based on a stress relaxation technique and the characterization of precipitates by scanning electron microscopy. By using this methodology, the effect of strain accumulation during processing on the precipitation kinetics can be determined. The results show that the characteristics of precipitation are significantly modified when plastic deformation is applied, and the kinetics are slightly affected by the amount of total plastic deformation.
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Publisher Copyright: © 2016, ASM International.
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dilatometry , hot deformation , nickel-based superalloys , precipitation , stress relaxation test , General Materials Science , Mechanics of Materials , Mechanical Engineering
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journal article
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Calvo , J , Penalva , M & Cabrera , J M 2016 , ' Characterization of Strain-Induced Precipitation in Inconel 718 Superalloy ' , Journal of Materials Engineering and Performance , vol. 25 , no. 8 , pp. 3409-3417 . https://doi.org/10.1007/s11665-016-2154-9