Fatigue Strength of Austempered Ductile Iron Cylinders Subjected to Repeated Internal Pressure

• Nakamura Takashi

• Kishima Kohichiro

• Jinbo Katsuhisa

• Matsuo Yohtaro

• Nagai Fumio

抄録

We carried out a repeating internal pressure test on a thin-wall cylinder of austempered ductile iron (ADI) which has been noted for its good combination of high static strength and elongation. We examined the effect of the austempering and surface hardening treatments by means of roller burnishing, which affects fatigue strength. For the lathe turned specimen (not roller burnished), the fatigue life of ADI was longer than that of the as-cast sample at a high pressure. But this difference of fatigue life became less clear with decreasing pressure. At the lowest pressure, most of the specimens were unfractured at 1 X 10⁷ cycles; the fatigue life of the ADI sample was shorter than that of the as-cast specimen. On the other hand, for a roller burnished specimen, the fatigue life of ADI was longer than that of the as-cast specimen at all pressures. After the scanning electron microscopic (SEM) observation of the fracture surface, it was clarified that most of the fracture origins were 0.1∼0.15 mm casting defects.

収録刊行物

• JSME international journal. Ser. A, Mechanics and material engineering

  JSME international journal. Ser. A, Mechanics and material engineering 36 (4), 348-353, 1993-10-15

  一般社団法人 日本機械学会

キーワード

• Fatigue
• Fractography
• Statistical Treatment
• Residual Stress
• Fatigue Life Distribution
• Internal Pressure
• Austempered Ductile Iron
• Retained Austenite

詳細情報

• CRID: 1390001205432599936
• NII論文ID: 110002964311
• NII書誌ID: AA10888746
• DOI: 10.1299/jsmea1993.36.4_348
• ISSN: 13408046
• Web Site: https://www.jstage.jst.go.jp/article/jsmea1993/36/4/36_4_348/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可