Strengthening Effects of Multi-Walled Carbon Nanotubes and Graphene …
119
Fig. 5 SEM micrographs of pure nickel and Ni-GNP composites
Table 2 Mechanical properties of pure nickel and Ni-GNP composites
Sample
Yield stress
(MPa)
Ultimate
tensile stress
(MPa)
Elongation (%)
Microhardness (HV
0.5)
Pure Ni
142.75
509.1
44
113.78 ± 2.1
Ni-Ball milled
286.91
545.73
58.5
XX
Ni-0.5GNP-DM
461.31
601.94
18.32
186.3 ± 2.9
Ni-1GNP-DM
321.79
510.36
19.83
150.3 ± 4.1
Ni-2GNP-DM
280.58
381.19
7.26
146.5 ± 3.8
GNPs within nickel metal matrix, grain refinement, and strong interfacial bonding
between nickel and GNPs that effectively transfer load during tensile deformation.
119
Fig. 5 SEM micrographs of pure nickel and Ni-GNP composites
Table 2 Mechanical properties of pure nickel and Ni-GNP composites
Sample
Yield stress
(MPa)
Ultimate
tensile stress
(MPa)
Elongation (%)
Microhardness (HV
0.5)
Pure Ni
142.75
509.1
44
113.78 ± 2.1
Ni-Ball milled
286.91
545.73
58.5
XX
Ni-0.5GNP-DM
461.31
601.94
18.32
186.3 ± 2.9
Ni-1GNP-DM
321.79
510.36
19.83
150.3 ± 4.1
Ni-2GNP-DM
280.58
381.19
7.26
146.5 ± 3.8
GNPs within nickel metal matrix, grain refinement, and strong interfacial bonding
between nickel and GNPs that effectively transfer load during tensile deformation.