Abstract
For the difficulties of AlLi alloy in processing and control, the manufacturing process of selective laser melting for AlLi alloy was adopted in this paper, and the influence of process parameters on the forming quality of AlLi alloy was explored. To this end, SLM experiments with different scanning speeds were carried out. The microstructure and defects of the samples were analyzed by optical microscope, scanning electron microscope, and transmission electron microscope. Then the mechanical properties of the samples were characterized using a microhardness tester and an electronic universal testing machine. The obtained results show that with the decrease of scanning speed, the microhardness of parallel to building direction was increased from 105.4 HV to 121.4 HV, and the tensile strength increased from 64.66 MPa to 99.35 MPa, indicating that the decrease of the scanning speed can reduce metallurgical defects of AlLi alloy and improve the overall properties of the material.
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