Plasma and Fusion Research

Volume 12, 1405022 (2017)

Regular Articles

High Temperature Fatigue Life Evaluation Using Small Specimen
Shuhei NOGAMI, Chiaki HISAKA1), Masaharu FUJIWARA1), Eichi WAKAI2) and Akira HASEGAWA
Department of Quantum Science and Energy Engineering, Graduate School of Engineering, Tohoku University, Sendai, Miyagi 980-8579, Japan
1)
Kobe Material Testing Laboratory Co., Ltd., Kako-gun, Hyogo 675-0155, Japan
2)
Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
(Received 12 January 2017 / Accepted 6 April 2017 / Published 16 May 2017)

Abstract

For developing the high temperature fatigue life evaluation method using small specimen, the effect of specimen size and test environment on the high temperature fatigue life of the reduced activation ferritic/martensitic steel, F82H-IEA, was investigated at 550 °C under the total strain range of 0.5 - 1.2 % using a new high temperature low cycle fatigue testing machine for the small round-bar specimen. No significant effect of the test environment (oxidation) on the fatigue life was observed in the standard-size specimen, whereas the slight reduction of the fatigue life due to that was indicated in the small-size specimen, especially at the final fracture stage of the test. It could be concluded that the new high temperature low cycle fatigue testing machine of the present study could satisfy the minimum requirements for the high temperature low cycle fatigue life evaluation using small specimen because the fatigue life data obtained using this testing machine could be acceptable based on the comparison with the previous studies data. To improve the reliability and the applicability of this test technology, further evaluations under the wider test temperature and strain conditions are expected in future.

Keywords

small specimen test technique, fatigue life, reduced activation ferritic/martensitic steel, specimen size, test environment, oxidation

DOI: 10.1585/pfr.12.1405022

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References

  • [1] S. Nogami, A. Nishimura, E. Wakai, H. Tanigawa, T. Itoh and A. Hasegawa, J. Nucl. Mater. 441, 125 (2013).
  • [2] S. Nogami, T. Itoh, H. Sakasegawa, H. Tanigawa, E.Wakai, A. Nishimura and A. Hasegawa, J. Nucl. Sci. Technol. 48-1, 60 (2011).
  • [3] S. Nogami, Y. Sato, A. Tanaka, A. Hasegawa, A. Nishimura and H. Tanigawa, J. Nucl. Sci. Technol. 47-1, 47 (2010).
  • [4] S. Nogami, Y. Sato, A. Hasegawa, H. Tanigawa, M. Yamazaki and M. Narui, J. Nucl. Mater. 417, 131 (2011).
  • [5] S. Nogami, Y. Sato, A. Hasegawa and H. Tanigawa, J. Plasma Fusion Res. SERIES 9, 232 (2010).
  • [6] S. Nogami, Y. Sato and A. Hasegawa, J. Nucl. Sci. Technol. 47-5, 457 (2010).
  • [7] S.W. Kim, H. Tanigawa, T. Hirose, K. Shiba and A. Kohyama, J. Nucl. Mater. 367-370, 568 (2007).
  • [8] H. Tanigawa, T. Hirose, M. Ando, S. Jitsukawa, Y. Katoh and A. Kohyama, J. Nucl. Mater. 307-311, 293 (2002).
  • [9] T. Hirose, H. Tanigawa, M. Ando, A. Kohyama, Y. Katoh and M. Narui, J. Nucl.Mater. 307-311, 304 (2002).
  • [10] T. Hirose, H. Sakasegawa, A. Kohyama, Y. Katoh and H. Tanigawa, J. Nucl. Mater. 283-287, 1018 (2000).
  • [11] T. Hirose, K. Shiba, T. Sawai, S. Jitsukawa and M. Akiba, J. Nucl. Mater. 329-333, 324 (2004).
  • [12] ASTM E112-85, “Standard Methods for Determining the Average Grain Size,” (1986).
  • [13] K. Shiba, “Fatigue Properties of F82H IEA Heat,” International Town Meeting on Advanced Ferritic Steel Design and Materials Issues for Fusion, San Diego, CA April 15, 2002.
  • [14] ASTM E606-04, “Standard Practice for Strain-Controlled Fatigue Testing,” (2005).
  • [15] B. Fournier, M. Sauzay, C. Caës, M. Noblecourt, V. Rabeau, A. Bougault and A. Pineau, J. Nucl. Mater. 386-388, 418 (2009).
  • [16] B. Fournier, M. Sauzay, C. Caës, M. Noblecourt, M. Mottot, A. Bougault, V. Rabeau, J. Man, O. Gillia, P. Lemoine and A. Pineau, Int. J. Fatigue 30, 1797 (2008).
  • [17] S. Kim and J.R. Weertman, Metall. Trans. A 19, 999 (1988).
  • [18] B. Fournier, M. Sauzay, C. Caës, M. Noblecourt, M. Mottot, A. Bougault, V. Rabeau and A. Pineau, Int. J. Fatigue 30, 649 (2008).
  • [19] B. Fournier, M. Sauzay, C. Caës, M. Noblecourt, M. Mottot, A. Bougault, V. Rabeau and A. Pineau, Int. J. Fatigue 30, 663 (2008).
  • [20] K. Hirakawa and K. Tokimasa, J. Soc. Mater. Sci. Jpn. 28-308, 386 (1979).