CNT-reinforced AlSi10Mg composite by selective laser melting: microstructural and mechanical properties |
| |
| Authors: | Xihe Liu Xin Zhou Florian Eibl Zhijian Shen |
| |
| Affiliation: | 1. School of Materials Science and Engineering, Tsinghua University, Beijing, People’s Republic of China;2. Science and Technology on Plasma Dynamics Lab, Xi’an, People’s Republic of China;3. Fraunhofer Institute for Laser Technology (ILT), Aachen, Germany;4. Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, Stockholm, Sweden |
| |
| Abstract: | Carbon nanotube (CNT)-AlSi10Mg composites were fabricated by selective laser melting (SLM). The influence of CNTs on the density, microstructure, and strength of SLM CNT-AlSi10Mg composites was investigated. The addition of CNTs over 0.1?wt-% significantly damaged the density due to the high surface energy of the CNTs. The network Si eutectic had no significant difference in either the SLM AlSi10Mg alloy or the CNT-AlSi10Mg composite. Reserved CNTs with a short scale were observed in the SLM CNT(0.5?wt-%)-AlSi10Mg composite. The ultimate tensile strength of the 0.05?wt-% CNT-AlSi10Mg composite was 441.2?±?0.9?MPa, which was higher than that of AlSi10Mg alloy. The grain boundary strengthening played an important role in the reinforcement of CNT-AlSi10Mg composite because of the refined grain. |
| |
| Keywords: | Aluminium alloy carbon nanotubes selective laser melting grain boundary strengthening strength |
|
|
