Study on the ProcessOptimization and Properties of 20 vol.% SiC Particle ReinforcedAluminium Matrix Composites Preparedby Selective Laser Melting
Author of the article:WU Yixing1,LIU Yongqin1,GAO Zhiming2,KANG Xiangjin1,GUO Ruping1,ZHI Xiyu1,ZHU Man1
Author's Workplace：1. School of Materials and Chemical Engineering, Xi'an Technological University , Xi'an 710016,China; 2. College of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an 710054,China
Key Words：selective laser melting; SiCP particles; Al-based composites; Vickers hardness
Abstract：
Parts formed via selective laser melting (SLM) technology exhibit rapid solidification characteristics while enabling the fabrication of complex geometries, making it widely applicable in the aerospace, automotive, and medical fields. Thus, a 20 vol.% SiC particle-reinforced AlSi10Mg composite was developed via SLM to investigate how varying
scanning speeds and laser powers affect microstructure and mechanical properties. The results indicate that the hardness fluctuates between 160~175 HV depending on the laser power. At the 1 000 mm/s scanning speed, the hardness of the material gradually increases, reaching a peak of 172.3 HV at 410 W. However, at the 1 200 mm/s scanning speed, the hardness significantly varies, reaching a maximum of 171.2 HV at 390 W. Notably, the samples processed at 390 W and 1 200 mm/s present fewer internal cracks and pores, with SiC particles uniformly distributed within the aluminium matrix and forming an ideal fusion interface.
