Microstructural Evolution of High Cr and High W Heat Resisting Ferritic Steels during Creep

  1. Prof. Dr. P. Neumann4,
  2. Dr. D. Allen5 and
  3. Prof. Dr. E. Teuckhoff6
  1. K. Takami1,
  2. Y. Murata2,
  3. M. Morinaga2,
  4. R. Hashizume3 and
  5. K. Kawamura1

Published Online: 5 JAN 2006

DOI: 10.1002/3527606181.ch63

Steels and Materials for Power Plants, Volume 7

Steels and Materials for Power Plants, Volume 7

How to Cite

Takami, K., Murata, Y., Morinaga, M., Hashizume, R. and Kawamura, K. (2000) Microstructural Evolution of High Cr and High W Heat Resisting Ferritic Steels during Creep, in Steels and Materials for Power Plants, Volume 7 (eds P. Neumann, D. Allen and E. Teuckhoff), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527606181.ch63

Editor Information

  1. 4

    Max-Planck-Institut für Eisenforschung, Max-Planck-Str. 1, 40237 Düsseldorf, Germany

  2. 5

    ABB Asltom Power UK Ltd., Cambridge Road, Whetstone, Leicester LE9 GLH, United Kingdom

  3. 6

    Siemens AG, Postfach 3240, 91050 Erlangen, Germany

Author Information

  1. 1

    Graduate Student of Nagoya University, Furo-cho, Cikusa-ku, Nagyoa 464-8603, Japan

  2. 2

    Department of Materials Science and Engineering, Graduate School of Engineering, Nagoya University, Furocho, Chikusa-ku, Nagoya 464-8603, Japan

  3. 3

    Materials Research Section, Technical Research Center, The Kansai Electric Power Company Inc., 11-20 Nakoji 3-chome, Amagasaki 661-0974, Japan

Publication History

  1. Published Online: 5 JAN 2006
  2. Published Print: 27 JUN 2000

Book Series:

  1. EUROMAT 99

ISBN Information

Print ISBN: 9783527301959

Online ISBN: 9783527606184

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Keywords:

  • steels for power plants;
  • materials for power plant;
  • microstructural evolution during creep;
  • high Cr and high W heat resisting ferritic steels

Summary

It is found that a number of the fine Laves phase precipitate inside the martensite lath in the tempered ferritic steels containing 10%Cr and 4.6%W. The shape of the precipitates is plate-like, and the sizes are about 50 ∼ 200nm. The Laves phase precipitates in the martensite lath holding a crystallographic relationship. Once the creep test is performed at 923K under the applied stress of 157MPa, the number of such fine precipitates of decreases inside the martensite lath, but instead large precipitates coagulate in the lath boundaries of the ferritic steels containing 4.6%W.