Relationship between yield ratio and the material constants of the Swift equation |
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| Authors: | S K Kim Y M Kim Y J Lim Nack J Kim |
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| Affiliation: | (1) POSCO Technical Research Laboratories, 699, Geumho-dong, Gwangyang-si, 545-090 Jeonnam, Korea;(2) Energy Materials Research Center, Korea Institute of Machinery and Materials, 66, Sangnam-dong, Changwon-si, 641-831 Gyeongnam, Korea;(3) POSCO Quality Technology Dept., 56-1, Goe-dong, Nam-gu, Pohang-si, 790-360 Gyeongbuk, Korea;(4) Center for Advanced Aerospace Materials, Pohang University of Science and Technology, San 31, Hyoja-dong, Nam-gu, Pohang-si, 790-784 Gyeongbuk, Korea |
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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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| Keywords: | yield ratio Swift equation work hardening material constants steel |
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