Effect of non-uniform deformation on low cycle fatigue properties of electron beam weld joint of F82H steel

Shuhei Nogami, W. Guan, Makoto Fukuda, H. Tanigawa, Akira Hasegawa

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

To improve the fatigue properties evaluation of the joint region of the fusion reactor blanket, the effect of the non-uniform distribution of the microstructure and strength on the fatigue properties of the electron beam weld joint of the F82H steel was investigated by the fatigue test and the numerical simulation of the deformation under the test. The fatigue life of the joint was approximately 10-20 % of that of the base metal. The fracture under the fatigue test occurred around the over-tempered heat affected zone (the region with the lowest hardness). One of the reasons of the shorter fatigue life of the joint could be the higher crack growth rate induced by the peak strain around the over-tempered heat affected zone due to the non-uniform deformation.

Original languageEnglish
Pages (from-to)607-611
Number of pages5
JournalFusion Science and Technology
Volume68
Issue number3
DOIs
Publication statusPublished - 2015 Oct 1

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Mechanical Engineering

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