Correlation in the parameters obtained by direct-fitting method and modifed williamson-hall method for cold worked iron

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Abstract

In the dislocation characterization using radiation diffraction, the modifed Williamson-Hall method gives the parameter a, f and S, in which the information about crystallite size, dislocation density and screw component of dislocation are contained respectively. On the other hand, the direct-ftting method gives the parameter a, micro-strain e and the correction parameter ωh00. In this study, the correlation in these parameters was investigated in cold rolled ferritic steel (Fe-0.0056%C). Results obtained are as follows: Almost same values were obtained for the parameter a in both methods. The value of parameter e increases as the S-value becomes small even under the same dislocation density. At the constant S-value, however, linear relationship was found between e and f. Between the parameter S and ωh00, there is an identical relationship expressed by the equation; S=1.16+1.46ωh00-3.71ωh002 regardless of dislocation density. In addition, it was confrmed that there is no large effect of texture on the dislocation characterization by the direct-ftting method and the modifed Williamson-Hall method.

Original languageEnglish
Pages (from-to)648-654
Number of pages7
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume105
Issue number6
DOIs
Publication statusPublished - Jun 2019

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

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