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Open AccessArticle

Calculation of Volume Fractions of In Situ TiB and Residual Stress Distributions in Functionally Graded Composite of Ti–TiB–TiB2

School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
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Materials 2019, 12(23), 4006; https://doi.org/10.3390/ma12234006
Received: 6 November 2019 / Revised: 27 November 2019 / Accepted: 29 November 2019 / Published: 3 December 2019
Ti matrix composite with a polylaminate structure was successfully fabricated via spark plasma sintering (SPS) process. A temperature gradient field (TGF) was obtained during the sintering to form functionally graded material (FGM) in a vacuum under 40 MPa for 5 min. The actual volume fractions of TiB in the matrix were calculated based on the X-ray diffraction pattern. The target volume fractions of TiB were 0%, 20%, 40%, 60%, 80% and 100%. The calculated TiB volume fractions were slightly higher than the target volume fractions in layers 2–4 and lower than the target volume fractions in layers 5–6 and the deviations in layers 4 and 5 were less than 5% of the target volume. Based on the elastic axial symmetry model, the residual stress distributions in the Ti matrix composite with a polylaminate structure were simulated, indicating a relatively low thermal residual stress in the FGM. View Full-Text
Keywords: functionally graded material (FGM); TiB; spark plasma sintering (SPS); x-ray diffraction (XRD); residual stress functionally graded material (FGM); TiB; spark plasma sintering (SPS); x-ray diffraction (XRD); residual stress
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Zhang, Y.; He, S.; Yang, W.; Ren, J.; Kong, H. Calculation of Volume Fractions of In Situ TiB and Residual Stress Distributions in Functionally Graded Composite of Ti–TiB–TiB2. Materials 2019, 12, 4006.

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