The densification, microstructure, and mechanical properties of (TiB₂+SiC)/AlSi10Mg composites manufactured by LPBF

Abstract

Herein, the (TiB₂+ SiC)/AlSi10Mg composites were prepared using a planetary ball mill and fabricated by the LPBF technique. The effects of nano-TiB₂ particles and laser power on the densification, microstructure, and mechanical properties of the LPBFed (TiB₂+ SiC)/AlSi10Mg composites were investigated. The densification and mechanical properties of composites increase first and then decrease with increasing laser power and nano-TiB₂ particle content. Under the optimal processing parameters and nano-TiB₂ particle content, 98.3% relative densification of the LPBFed composites was achieved. The LPBFed (TiB₂+ SiC)/AlSi10Mg composites had superior mechanical properties, including a tensile strength of 452.8 MPa, a yield strength of 217.2 MPa, and an elongation of 4.33% (increases of 30.8%, 14.3%, and 90.7%, respectively), and the maximum microhardness of 126.7 HV (increase of 6.1%).

KEYWORDS:

• LPBF
• (TiB₂+ SiC)/AlSi10Mg composite
• Densification
• Mechanical properties

Acknowledgements

The authors are grateful for the financial support of the Natural Science Foundation of China (Nos.51971166, 52102075).

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by Natural Science Foundation of China: [Grant Number 52102075]; Natural Science Foundation of China: [Grant Number 51971166].