書誌事項
- タイトル別名
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- Effects of Distribution of Graphite Nodules on Characteristics of Fatigue Crack Propagation in Spheroidal Graphite Cast Iron
- キュウジョウ コクエン チュウテツ ノ ヒロウ キレツ シンテン トクセイ ニ オヨボス コクエン ブンプ ノ エイキョウ
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The purpose of this study is to investigate the effects of the distribution of graphite nodules on characteristics of fatigue crack propagation in spheroidal graphite cast iron where carbon content and the distribution of graphite nodules are changed. As specimens, spheroidal graphite cast irons with 3.0, 3.2, 3.4, 3.6 and 3.8mass% carbon content were produced respectively (C3.0%, C3.2%, C3.4%, C3.6% and C3.8% material). The mean diameter of the graphite nodules decreases as the carbon content increases, and the number of graphite nodules per unit area increases. The fatigue crack propagation test was conformed to ASTM standards. Stress ratio R was 0.1, and the specimen used was the 1CT type of 12.5mm in thickness. The test was carried out at room temperature atr the humidity of 40%. The relationship between the characteristics of fatigue crack propagation and crack closure produced on the fracture surface was also investigated. <br> Threshold stress intensity factor range, ΔKth was almost constant in C3.0 to C3.6% materials, but in the C3.8% material in which the graphite was close to each other, ΔKth decreased. In all materials, fatigue crack propagated connecting the graphite nodules. In the C3.8% material, the spacing between graphite nodules was small. Therefore, fatigue crack propagation rate increased in comparison with other materials, thereby decreasing the ΔKth of the C3.8% material as a result.
収録刊行物
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- 鋳造工学
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鋳造工学 82 (2), 86-91, 2010
公益社団法人 日本鋳造工学会
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詳細情報 詳細情報について
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- CRID
- 1390001206511015168
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- NII論文ID
- 10026313051
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- NII書誌ID
- AN10514770
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- ISSN
- 21855374
- 13420429
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- NDL書誌ID
- 10588296
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可