Improvement of Measurement Method of Precipitate Number Densities in 9Cr Steel by Cs-corrected Transmission Electron Microscopy

DOI

Bibliographic Information

Other Title
  • 収差補正TEMによる9Cr鋼析出物数密度測定の高度化

Abstract

High-chromium steels such as 9Cr and 12Cr steels are currently used as boiler components, e.g. high-temperature steam piping and steam headers in fossil-fuel power plants. It was reported that cracks and creep damage have occurred in actual components in recent years. Therefore, an accurate assessment of the remaining life of high-chromium steels is important issue for electric power companies. In order to solve this issue it is useful to evaluate number density of precipitates. However, it should be noted that the use of area density of precipitates is inadequate in TEM observation in some cases. This study shows that volume density of precipitates in modified 9Cr-1Mo steel can be evaluated accurately by taking into account the specimen thickness. Furthermore, we studied relationship between the volume density of precipitates and creep strength of modified 9Cr-1Mo steel.

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Keywords

Details 詳細情報について

  • CRID
    1390291932684491136
  • DOI
    10.14942/tenpes.73.52
  • ISSN
    21886148
    2187929X
  • Text Lang
    ja
  • Data Source
    • JaLC
  • Abstract License Flag
    Disallowed

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