Evaluation of high-temperature tensile properties of reduced activation ferritic steels by small punch test

Toshiya Nakata, Shin Ichi Komazaki, Motoki Nakajima, Yutaka Kohno, Hiroyasu Tanigawa, Kiyoyuki Shiba, Akira Kohyama

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Reduced activation ferritic/martensitic steels (RAFs) are one of the leading candidates for structural materials of fusion reactors. Since there are severe limitations on specimen capacity at material irradiation testing facilities, it is required to use miniaturized specimens. In the previous study, it was revealed that the small punch (SP) creep test was useful technique for evaluating the creep rupture strength of RAFs. If this SP test technique was applicable to the measurement of not only the creep properties but also the high-temperature tensile properties, it would have an important meaning from the standpoints of designing and developing more superior fusion reactor materials. In this study, the SP test were carried out at 823-923 K to investigate the applicability using two representative RAFs, JLF-1 and F82H. The experimental results revealed that the load at initial localized plastic straining, F y, and the maximum load, F max, determined by the SP test were well correlated with the yield strength, σ y, and the ultimate tensile strength, σ B, respectively. The empirical linear correlation between the F y and the σ y was expressed by σ y = 1.5F y + 19. Similarly, there was an almost linear correlation between the F max and the σ B represented by σ B = 0.37F max + 86. Consequently, the high-temperature tensile properties of the RAFs can be also estimated by the SP test and the above empirical equations.

Original languageEnglish
Pages (from-to)642-645
Number of pages4
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume70
Issue number8
DOIs
Publication statusPublished - Aug 2006
Externally publishedYes

Fingerprint

punches
tensile properties
Ferritic steel
Tensile properties
Creep
Chemical activation
Fusion reactors
steels
activation
evaluation
fusion reactors
Martensitic steel
creep rupture strength
Temperature
reactor materials
Yield stress
creep properties
Tensile strength
creep tests
Irradiation

Keywords

  • Fusion reactor structural materials
  • High-temperature tensile properties
  • Miniaturized specimen
  • Reduced activation ferritic/martensitic steels
  • Small punch test

ASJC Scopus subject areas

  • Metals and Alloys

Cite this

Evaluation of high-temperature tensile properties of reduced activation ferritic steels by small punch test. / Nakata, Toshiya; Komazaki, Shin Ichi; Nakajima, Motoki; Kohno, Yutaka; Tanigawa, Hiroyasu; Shiba, Kiyoyuki; Kohyama, Akira.

In: Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals, Vol. 70, No. 8, 08.2006, p. 642-645.

Research output: Contribution to journalArticle

Nakata, Toshiya ; Komazaki, Shin Ichi ; Nakajima, Motoki ; Kohno, Yutaka ; Tanigawa, Hiroyasu ; Shiba, Kiyoyuki ; Kohyama, Akira. / Evaluation of high-temperature tensile properties of reduced activation ferritic steels by small punch test. In: Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals. 2006 ; Vol. 70, No. 8. pp. 642-645.
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