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Determination of the Minimum Scan Size to Obtain Representative Textures by Electron Backscatter Diffraction

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Abstract

A new method for analyzing microstructure is proposed to evaluate the long-range dependence of texture. The proposed method calculates the average disorientation as a function of distance between data points as measured by electron backscatter diffraction patterns. This method gives a measure of clustering of texture and is used to evaluate accurately the effective grain size. This procedure in conjunction with Information theory is used to estimate a representative scan size for various materials. Analyses show that the optimal scan size depends on grain morphology and crystallographic texture. The results also indicate that on an average the optimal scan size needs to be 10 times the effective grain size.

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Notes

  1. Defined here as the maximum intensity in pole figures.

  2. The details in this are fascinating but will not be discussed here to avoid diversion from the main thrust of the current study.

  3. Grain size reported in Table I is grain radius.

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Acknowledgments

This work was supported by the Natural Sciences and Engineering Research Council of Canada (NSERC) and General Motors of Canada. The authors also gratefully acknowledge the High Performance Computing Center at the University of Sherbrooke (RQCHP).

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Authors and Affiliations

  1. Department of Mechanical and Mechatronics Engineering, University of Waterloo, 200 University Ave. W, Waterloo, ON, N2L 3G1, Canada

    Abhijit Brahme (Postdoctoral Fellow), Yauheni Staraselski (Doctoral Student) & Kaan Inal (Professor)

  2. General Motors Research and Development Center, 3500 Mound Rd., Warren, MI, 48090-9055, USA

    Raja K. Mishra (Technical Fellow)

Authors
  1. Abhijit Brahme
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  2. Yauheni Staraselski
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  3. Kaan Inal
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  4. Raja K. Mishra
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Correspondence to Kaan Inal.

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Manuscript submitted February 23, 2012.

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Brahme, A., Staraselski, Y., Inal, K. et al. Determination of the Minimum Scan Size to Obtain Representative Textures by Electron Backscatter Diffraction. Metall Mater Trans A 43, 5298–5307 (2012). https://doi.org/10.1007/s11661-012-1364-5

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