Ameliorating strength-ductility efficiency of graphene nanoplatelet-reinforced aluminum composites via deformation-driven metallurgy. (1st March 2022)

• Record Type: Journal Article
• Authors: Xie, Yuming; Meng, Xiangchen; Chang, Yuexin; Mao, Dongxin; Yang, Yuchen; Xu, Yanli; Wan, Long; Huang, Yongxian
• Is Part Of: Composites science and technology. Volume 219(2022)
• Publication Date: 2022-03-01
• Subjects: Graphene -- Composites -- Interfaces -- Mechanical properties -- Modeling; Composite materials -- Periodicals; Composite materials; Fibrous composites; Periodicals; 620.118
• DOI: 10.1016/j.compscitech.2021.109225
• Languages: English
• ISSNs: 0266-3538

Abstract

Abstract: 1.5 wt% graphene nanoplatelet-reinforced aluminum matrix composites were prepared by deformation-driven metallurgy to ameliorate strength-ductility efficiency. Severe plastic deformation with its frictional/deformation heat introduced by deformation-driven metallurgy was studied by their strengthening-toughing behaviors related to graphene nanoplatelet dispersion, interfacial bonding, and grain refinement. The synergy strengthening behaviors were studied via modeling analysis. Uniform dispersion of graphene nanoplatelets and ultra-fine microstructures (267.0 nm) were obtained via severe plastic deformation and dynamic recrystallization. High-efficiency interfacial bonding was realized via graphene nanoplatelets-(amorphous Al2 O3 )-Al semi-direct interface without the formation of Al4 C3 . The automatic flow of Al2 O3 nanodots to compensate for the spatial discontinuity caused by the interlayer slip of graphene was observed to achieve self-compensating spatial continuity. The ultimate tensile strength and elongation reached 468 ± 7 MPa and 19.9 ± 0.6%, respectively, showing an enhancement of strength by 293.3% with almost no loss in ductility. Graphical abstract: Image 1