Mechanism of reduction of fretting fatigue limit in hydrogen gas in SUS304

Masanobu Kubota, Yasuhiro Tanaka, Kyohei Kuwada, Yoshiyuki Kondo

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The authors reported reduction of fretting fatigue strength in hydrogen gas using several kinds of materials such as low alloy steel, heat resistant steel, aluminum alloy, austenitic stainless steels, etc. In this study, mechanism of the reduction was discussed thorough detailed observations of small fretting fatigue cracks and two-step test in which the environment was changed during a test. The material was 30% pre-strained austenitic stainless steel SUS304. Hydrogen gas pressure was 0.12MPa in absolute pressure. Whereas oxidation process was important to develop fretting damage in air, adhesion was dominant in the fretting in hydrogen gas. In hydrogen gas, small cracks were emanated at both ends of the adhered parts. Since the major crack was propagated from one of the small cracks emanating adhered part, the adhesion and formation of small cracks were important determinants of the reduction of fretting fatigue strength in hydrogen gas. In the fretting fatigue test in hydrogen gas following fretting fatigue test in air, no fracture occurred even if the stress amplitude was higher than the fretting fatigue limit in hydrogen gas. The reason was that the oxidized wear film, which was produced in the first air environment, prevented the adhesion and the formation of small cracks. Another two-step test was that small cracks were formed in hydrogen gas and the test environment was then changed to air. As the result, there was no fracture of the specimen even the test was performed at stress amplitude that the fracture of specimen occurred in the single hydrogen gas environment. The result suggested that the stress field in the vicinity of small cracks were severer in hydrogen gas than in air.

Original languageEnglish
Pages (from-to)439-446
Number of pages8
JournalZairyo/Journal of the Society of Materials Science, Japan
Volume59
Issue number6
DOIs
Publication statusPublished - Jun 1 2010

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fretting
Hydrogen
Gases
Fatigue of materials
cracks
hydrogen
gases
Cracks
air
Air
adhesion
Adhesion
fatigue tests
austenitic stainless steels
Austenitic stainless steel
high strength steels
Steel
High strength steel
determinants
aluminum alloys

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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Mechanism of reduction of fretting fatigue limit in hydrogen gas in SUS304. / Kubota, Masanobu; Tanaka, Yasuhiro; Kuwada, Kyohei; Kondo, Yoshiyuki.

In: Zairyo/Journal of the Society of Materials Science, Japan, Vol. 59, No. 6, 01.06.2010, p. 439-446.

Research output: Contribution to journalArticle

Kubota, Masanobu ; Tanaka, Yasuhiro ; Kuwada, Kyohei ; Kondo, Yoshiyuki. / Mechanism of reduction of fretting fatigue limit in hydrogen gas in SUS304. In: Zairyo/Journal of the Society of Materials Science, Japan. 2010 ; Vol. 59, No. 6. pp. 439-446.
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