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Effect of B4C on the Microstructure and Mechanical Properties of As-Cast TiB+TiC/TC4 Composites

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Acta Metallurgica Sinica (English Letters) Aims and scope

Abstract

Different additions of B4C were introduced into TC4 to alter the microstructure and mechanical properties. The morphologies of reinforcements are related to the solidification paths. The refinement of lamellar spacing λ is based on the precipitation pattern of β-phases. Microhardness, compression elastic modulus (E c), and elastic modulus of the matrix (E m) appear non-linear relationships with B4C additions. Due to the refinement of lamellar spacing with Hall–Petch-type relationships, and the solution strengthening of C on the α + β matrix, the effect of reinforcements on the mechanical properties will be more efficient when the additions of B4C are no more than 0.19 wt%. When the additions of B4C are more than 0.19 wt%, the efficiency will decrease.

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Acknowledgments

This work was financially supported by the National Basic Research Program of China (No. 2012CB619600), Shanghai Academy of Spaceflight-Joint Research Centre of Shanghai Jiaotong University advanced aerospace technology (No. USCAST2012-14), Shanghai Science and Technology Committee (No. 12XD1402800), and the Dawn Program of Shanghai Education Commission (No. 10SG15).

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Authors and Affiliations

  1. State Key Laboratory of Metal Matrix Composite, Shanghai Jiaotong University, Shanghai, 200240, China

    Jiheng Wang, Xianglong Guo, Liqiang Wang, Weijie Lu & Di Zhang

  2. School of Material Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, China

    Jiheng Wang

  3. Shanghai Research Institute of Spaceflight Precision Machinery, Shanghai, 201600, China

    Lv Xiao, Baohui Li & Zhongquan Li

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  1. Jiheng Wang
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  2. Xianglong Guo
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  4. Liqiang Wang
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  5. Weijie Lu
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  6. Baohui Li
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  7. Zhongquan Li
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  8. Di Zhang
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Correspondence to Weijie Lu.

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Wang, J., Guo, X., Xiao, L. et al. Effect of B4C on the Microstructure and Mechanical Properties of As-Cast TiB+TiC/TC4 Composites. Acta Metall. Sin. (Engl. Lett.) 27, 205–210 (2014). https://doi.org/10.1007/s40195-014-0035-5

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  • DOI: https://doi.org/10.1007/s40195-014-0035-5

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