Volume 40 Issue 10
Oct.  2023
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LIU Yujia, YU Hao, ZOU Tianchun, et al. Effect of graphene nanosheets on the pore structure and compressive mechanical properties of aluminum-magnesium matrix composite foams[J]. Acta Materiae Compositae Sinica, 2023, 40(10): 5892-5901. doi: 10.13801/j.cnki.fhclxb.20221213.003
Citation: LIU Yujia, YU Hao, ZOU Tianchun, et al. Effect of graphene nanosheets on the pore structure and compressive mechanical properties of aluminum-magnesium matrix composite foams[J]. Acta Materiae Compositae Sinica, 2023, 40(10): 5892-5901. doi: 10.13801/j.cnki.fhclxb.20221213.003

Effect of graphene nanosheets on the pore structure and compressive mechanical properties of aluminum-magnesium matrix composite foams

doi: 10.13801/j.cnki.fhclxb.20221213.003
Funds:  Basic Research Funds for Central Universities, Special Project of Civil Aviation University of China (3122020083)
  • Received Date: 2022-10-21
  • Accepted Date: 2022-12-02
  • Rev Recd Date: 2022-12-01
  • Available Online: 2022-12-14
  • Publish Date: 2023-10-15
  • Graphene nanosheets (GNSs) reinforced Al-Mg matrix composite foams (G-AMCFs) were successfully prepared by ball milling and powder metallurgy foaming. The effects of GNSs on pore morphology, microstructure and quasi-static compressive mechanical properties of Al-Mg foams were studied. The results show that the addition of GNSs can increase pore nucleation sites and cause the segregation of MgO around the GNSs. With the increment of GNSs content, the pore size of G-AMCFs increases. The compressive mechanical properties of 0.25wt%G-AMCFs are the best. Compared with Al-Mg foams, the energy absorption capacity, yield strength and plateau stress of 0.25wt%G-AMCFs are increased by 43.6%, 42.9% and 28.1%, respectively. Meanwhile, 0.25wt%G-AMCFs show good ductile deformation behavior. The cell structure with high content of G-AMCFs (0.75wt%) deteriorates which leads to a decrease in mechanical properties, but the yield strength is still higher than that of Al-Mg foams. The enhancement mechanism of composite foams includes dispersion strengthening, load transfer and precipitation strengthening.

     

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