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Influence of microstructural features on the yield strength of Ti–6Al–4V: a numerical study by using the crystal plasticity finite element method

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Abstract

In this paper, a numerical study was presented on the influence of microstructural features on the yield strength of bimodal α–β Ti–6Al–4V. Tensile tests and microscopic observations were conducted to provide experimental data of yield strength and microstructure characterization. Sets of representative volume elements were generated using characterization data collected from electron back-scattered diffraction. To investigate the sensitivity of macroscopic yield strength to the morphology of the microstructure, the geometrical parameters such as sizes of equiaxed α grains and lamellar colonies, lamellar widths, volume fractions of equiaxed α grains and Burgers orientation relationship, were studied systematically in a series of simulations. The simulations used crystal plasticity finite element framework to model the deformation behavior of the generated virtual samples under tensile loading condition. Yield strength trends as functions of investigated microstructural features were examined. Moreover, inspection of local deformation of individual equiaxed α grain and lamellar colonies provided an insight into the microstructure-properties relations.

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Acknowledgements

Xiang Wang gratefully acknowledges the financial support from the China Scholarship Council (CSC). The support by the French National Research Agency in the framework of ANR 14-CE07-0003 “HighS-Ti” program is gratefully acknowledged. Guy Dirras and Kei Ameyama would like to thank Ryo MAEDA, M. Sc., for EBSD investigations made as part of an exchange program between Sorbonne Paris Nord University (France) and the Graduate School of Engineering at Ritsumeikan University (Japan).

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Authors and Affiliations

  1. Laboratoire Des Sciences Des Procédés et des Matériaux, CNRS UPR 3407, Université Sorbonne Paris Nord, 93430, Villetaneuse, France

    Xiang Wang, Jia Li & Guy Dirras

  2. Department of Mechanical Engineering, Risumeikan University, Kusatsu, Shiga, Japan

    Kei Ameyama

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  1. Xiang Wang
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  2. Jia Li
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  3. Kei Ameyama
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  4. Guy Dirras
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Correspondence to Xiang Wang.

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Wang, X., Li, J., Ameyama, K. et al. Influence of microstructural features on the yield strength of Ti–6Al–4V: a numerical study by using the crystal plasticity finite element method. Meccanica 56, 1129–1146 (2021). https://doi.org/10.1007/s11012-020-01301-3

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