Microstructure evolution and mechanical properties of TiB/Ti6Al4V composites based on selective laser melting

  • Xu Huang
  • Yitao Zhu Fujian University of Technology
  • Weidong Huang
  • Shuaishuai Qin
  • Lu Wang
Keywords: Selective laser melting, Ti6Al4V, TiB whisker enhancement, Mechanical properties

Abstract


To study the strengthening mechanism of TiB/Ti6Al4V composites prepared by SLM and the control method of the energy density on the microstructure and mechanical properties, in this paper, Ti6Al4V+3wt.% TiB2 composite powder was used as a raw material to synthesize TiB in situ and prepare TiB/Ti6Al4V whisker-reinforced composites. The effect of the energy density on the forming properties, microstructure evolution and mechanical properties of TiB/Ti6Al4V was systematically studied, and the formation, regulation and strengthening mechanism of TiB whiskers were discussed. The results show that during the SLM process, adjusting the energy density can effectively inhibit the occurrence of cracks in the TiB/Ti6Al4V samples. The added TiB2 acts as a nucleation center to significantly refine the grains during the forming process and reacts with Ti to form a needle-like TiB network structure at the grain boundary, strengthening the whiskers. Additionally, TiB plays a role in dispersion strengthening. Compared with Ti6Al4V, the microhardness of TiB/Ti6Al4V reaches 430.6±11.45HV, an increase of 27.9%, and the wear volume of the sample is 0.85×10-3 mm3, a decrease of 62.64%.

Author Biographies

Xu Huang

Associate Professor

1Fujian Key Laboratory of Intelligent Machining Technology and  Equipment（Fujian University of Technology）, Fuzhou 350118, China.

2Advanced Manufacturing Productivity Promotion Center of Fujian province,Fuzhou 350118, China.

3Academy of Mechanical and Automotive Engineering, Fujian University of Technology, Fuzhou 350118, China.

Weidong Huang

professor

1Fujian Key Laboratory of Intelligent Machining Technology and  Equipment（Fujian University of Technology）, Fuzhou 350118, China.

2Advanced Manufacturing Productivity Promotion Center of Fujian province,Fuzhou 350118, China.

3Academy of Mechanical and Automotive Engineering, Fujian University of Technology, Fuzhou 350118, China.

Shuaishuai Qin

doctor

1Advanced Manufacturing Productivity Promotion Center of Fujian province,Fuzhou 350118, China.

2Academy of Mechanical and Automotive Engineering, Fujian University of Technology, Fuzhou 350118, China.

Lu Wang

Master's degree in reading

1Advanced Manufacturing Productivity Promotion Center of Fujian province,Fuzhou 350118, China.

2Academy of Mechanical and Automotive Engineering, Fujian University of Technology, Fuzhou 350118, China.

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Published
2022/12/23
How to Cite
Huang, X., Zhu, Y., Huang, W., Qin, S., & Wang, L. (2022). Microstructure evolution and mechanical properties of TiB/Ti6Al4V composites based on selective laser melting. Journal of Mining and Metallurgy, Section B: Metallurgy, 58(3), 439-450. Retrieved from https://aseestant.ceon.rs/index.php/jmm/article/view/37544
Issue
Vol. 58 No. 3 (2022)
Section
Original Scientific Paper

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