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Relationship between yield ratio and the material constants of the Swift equation

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Abstract

The relationship between the yield ratio and the material constants,b andN, of the Swift equation for hotrolled low carbon steels has been established. The yield ratio calculated by using the Swift equation agrees well with an experimentally obtained yield ratio. It was found that the yield ratio decreases with an increasing value ofN or with a decreasing value ofb. It was also found, however, that high yield strength is associated with small values of bothb andN. Therefore, to obtain both high yield strength and low yield ratio, a detailed microstructural control is needed to determine the optimum values ofb andN.

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Authors and Affiliations

  1. POSCO Technical Research Laboratories, 699, Geumho-dong, Gwangyang-si, 545-090, Jeonnam, Korea

    S. K. Kim

  2. Energy Materials Research Center, Korea Institute of Machinery and Materials, 66, Sangnam-dong, Changwon-si, 641-831, Gyeongnam, Korea

    Y. M. Kim

  3. POSCO Quality Technology Dept., 56-1, Goe-dong, Nam-gu, Pohang-si, 790-360, Gyeongbuk, Korea

    Y. J. Lim

  4. Center for Advanced Aerospace Materials, Pohang University of Science and Technology, San 31, Hyoja-dong, Nam-gu, Pohang-si, 790-784, Gyeongbuk, Korea

    Nack J. Kim

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  1. S. K. Kim
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Correspondence to Nack J. Kim.

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Kim, S.K., Kim, Y.M., Lim, Y.J. et al. Relationship between yield ratio and the material constants of the Swift equation. Met. Mater. Int. 12, 131–135 (2006). https://doi.org/10.1007/BF03027468

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