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Surface microstructure characterization on shot peened (TiB + TiC)/Ti-6Al-4V by Rietveld whole pattern fitting method

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Abstract

The surface microstructure of shot peened (TiB + TiC)/Ti-6Al-4V is investigated using Rietveld whole pattern fitting method. The domain size and microstrain of them are obtained. By comparing the calculated results between them, it can be found that the microstructure variations of Ti-6Al-4V are more severe than those of (TiB + TiC)/Ti-6Al-4V, which is due to the effect of reinforcements’ resistance to the deformation of the surface layer. The distribution of average domain size and microstrain of (TiB + TiC)/Ti-6Al-4V at varying depths are calculated, and the results are discussed in detail. Moreover, the probability distribution of the domain size at different depths is obtained using the lognormal distribution model. Based on the discussion, the results obtained from Rietveld whole pattern fitting method agree with the results calculated using the Voigt method, which reveals that the Rietveld method is an effective method of characterizing the surface microstructure of titanium matrix composites after shot peening treatments.

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ACKNOWLEDGMENT

This work is supported by the projects of National Natural Science Foundation of China (Grant No. 51302168 and 51502142), the 973 Program under Grant No: 2014CB046701, Research Foundation of Educational Commission of Sichuan Province of China (16ZA0367), Jiangxi Foreign Cooperation Program (Grant No.: 20144BDH80004), and The Hujiang Foundation of China (B14006). The financial support of the General Program of Natural Science Foundation of the Jiangsu Higher Education Institutions of China (Grant No. 15KJB430021) and the Startup Foundation for Introducing Talent of NUIST (No. 2014r036) are gratefully appreciated. The authors also thank to the financial support of the National Natural Science Foundation of China (No. 51405356), and the Research Fund for the Doctoral Program of Higher Education of China (No. 20130143120015). The authors gratefully acknowledge Mr. Timothy Ethington and Mr. Landon Ostler for their assistance on improving the language.

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Authors and Affiliations

  1. State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, People’s Republic of China

    Lechun Xie, Liqiang Wang, Chuanhai Jiang & Weijie Lu

  2. College of Physics and Engineering, Chengdu Normal University, Chengdu, Sichuan, 611130, People’s Republic of China

    Qiang Feng

  3. School of Physics and Optoelectronic Engineering, Nanjing University of Information Science and Technology, Nanjing, Jiangsu, 210044, People’s Republic of China

    Yan Wen

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  1. Lechun Xie
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Correspondence to Lechun Xie or Liqiang Wang.

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Xie, L., Feng, Q., Wen, Y. et al. Surface microstructure characterization on shot peened (TiB + TiC)/Ti-6Al-4V by Rietveld whole pattern fitting method. Journal of Materials Research 31, 2291–2301 (2016). https://doi.org/10.1557/jmr.2016.256

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