フェライト基地球状黒鉛鋳鉄の低温における静的及び動的3点曲げ特性 Static and Dynamic Three-Point Bending Characteristics of Ferritic Spheroidal Graphite Cast Iron at Low Temperature

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  Static and dynamic bending tests of ferritic spheroidal graphite cast iron were carried out at temperatures range from room temperature to 77K. Bending load-time curves obtained by using instrumented Charpy impact testing machine are converted to load-deflection curves. The relationship between bending load <i>P</i> and deflection <i>δ</i> is well expressed by <i>P</i>=<i>Dδ<sup>n</sup></i> in both of static and dynamic tests, where <i>D</i> and <i>n</i>' are constants. <i>D</i> and <i>n</i>' obtained are both larger than the expected respectively. Constant <i>D</i> in dynamic test is larger than that in static at the same temperature by 17%, regardless of the testing temperature. This difference coincides pretty well with the measured strain rate exponent of flow stress 0.0103. The critical deflection just before fracture <i>δ</i><sub>c</sub>, is proportional to fracture strain of specimen at loading point. Fracture energy <i>W</i>, the area surrounded by the load-deflection curve and abscissa graphically, can be numerated by <i>W</i> = <i>P</i>m<i>δ</i><sub>c</sub> / (1 + <i>n</i>'), where <i>P</i><sub>m</sub> denotes the maximum bending load. The strain rate dependence of transition temperature for the iron seems roughly similar to that of steel.

収録刊行物

  • 鋳造工学 = Journal of Japan Foundry Engineering Society  

    鋳造工学 = Journal of Japan Foundry Engineering Society 70(8), 563-568, 1998-08 

    Japan Foundry Engineering Society

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各種コード

  • NII論文ID(NAID)
    10002554106
  • NII書誌ID(NCID)
    AN10514770
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    13420429
  • NDL 記事登録ID
    4546090
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-277
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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