Stress and Temperature Dependence of Time to Rupture of Heat Resisting Steels

この論文にアクセスする

この論文をさがす

著者

抄録

A new relation among the time to creep rupture, the stress and the temperature has been developed. Assuming the velocity of dislocations is controlled by a thermally activated process, the time to rupture, t<sub>r</sub> is expressed as<br><br>log<I>t</I><sub>r</sub>=<sub>2.3<I>RT</I></sub><sup><u><I>Q-Vσ</I></u></sup> -<I>C</I><br><br>where <I>Q, V, σ, R, T, C</I> are respectively the activation energy, the activation volume, the applied stress, the gas constant, the absolute temperature and the Larson-Miller constant, <I>i.e.</I> about 20. The new equation reads that the applied stress in a linear scale is a linear function of the Larson-Miller parameter, <I>P</I>=<I>T</I>(log <I>t</I><sub>r</sub>+<I>C</I>).<br> The new relation has been applied to the long term rupture data of several heat resisting steels obtained by National Research Institute for Metals. According to the equation the rupture data for each material can be classified into 2-4 groups where the deformation mechanism differs with each other. It has been found that for each group the data are excellently fitted to the equation. <br>A set of the data from several hours to longer than 100000 h are roughly well fitted to another expression of a hyperbolic tangent type. The expression is the approximate equation of the above theoretical expression.

収録刊行物

  • ISIJ international

    ISIJ international 39(4), 380-387, 1999-04-15

    The Iron and Steel Institute of Japan

参考文献:  12件中 1-12件 を表示

  • <no title>

    SHERBY O. D.

    Prog. Mater. Sci. 13, 325, 1968

    被引用文献1件

  • <no title>

    LARSON F. R.

    Trans. ASME 74, 705, 1952

    被引用文献2件

  • <no title>

    MANSON S. S.

    NASA TN 2890, 1952

    被引用文献2件

  • <no title>

    PREKEL H. L.

    Dislocation Dynamics 431, 1968

    被引用文献1件

  • <no title>

    MURA T.

    Micromechanics 99, 1976

    被引用文献1件

  • <no title>

    MONKMAN F. C.

    Proc. ASTM 56, 595, 1956

    被引用文献4件

  • <no title>

    National Research Institute for Metals : NRIM Creep Data Sheet (20B), 1994

    被引用文献1件

  • <no title>

    National Research Institute for Metals : NRIM Creep Data Sheet (3B), 1986

    被引用文献1件

  • <no title>

    National Research Institute for Metals : NRIM Creep Data Sheet (4B), 1986

    被引用文献1件

  • <no title>

    MARUYAMA K.

    Koonkyodo no Zairyokagaku 111, 1997

    被引用文献1件

  • <no title>

    OIKAWA H.

    Technology Reports, Tohoku Univ. 47(1), 67), 1982

    被引用文献1件

  • <no title>

    YAMANOUCHI N.

    J. Nucl. Mater. 191-194, 822, 1992

    DOI 被引用文献5件

被引用文献:  3件中 1-3件 を表示

各種コード

ページトップへ