Microstructural dependence of fracture toughness in high-strength 7000 forging alloys

Effect of solution treatment on the strength and fracture toughness of aluminum alloy 7050

“…During deformation, some voids generally form on the interfaces between the residual phase and the matrix. As the plastic deformation proceeds, the growth and coalesce of the voids provide the fracture sources [5,9]. For the SST470 sample, there are many dimples on the fracture surface, which indicates that the failure is the ductile fracture.…”

“…Compared to the conventional aluminum alloys such as 2xxx and Al-Li alloys, the 7xxx series aluminum alloy exhibits a good combination between the strength and fracture toughness [3]. Thus, many investigations have been carried out on the microstructures and properties of the 7xxx series aluminum alloy [4,5].…”

Notch fracture toughness of high-strength Al alloys

“…The obtained values are compared using the solution given by Creager and Paris [9] and Classical Linear Fracture Mechanics. The alloy microstructure and fracture mechanisms reported earlier in our extensive studies [10][11][12][13][14] are also presented. V-0.003 B-0.16 Fe-0.09 Si (mass%).…”

Analysis of the fractal dimension of grain boundaries of AA7050 aluminum alloys and its relationship to fracture toughness

“…Effect of fractal dimension of grain boundaries on fracture toughness of the material Investigations carried out on the fracture toughness of the 7XXX series aluminum alloys show that the fracture toughness is affected by a range of microstructural features, such as coarse particles [38,39], precipitates [40,36], configuration of the precipitation free zone [41,42], and grain size [43][44][45]. However no attempt has been made to investigate the influence of grain boundary morphology on the fracture toughness of these materials at room temperature.…”