Influence of notch radius and microstructure on the fracture behavior of Al–Zn–Mg–Cu alloys of different purity

Notch fracture toughness of high-strength Al alloys

“…Thus, it can be explained why fracture toughness of a notched specimen (K q,c ) is higher than the fracture toughness of a cracked specimen (K Ic ) and increases with notch radius because additional plastic work is dissipated in the notch plastic zone. For a notch radius lower than a critical value, q c, the notch plastic zone is smaller than the fracture process zone and no extra plastic work is dissipated [21]. This situation, which can be observed for some steels was not the case in the present study and then a plateau cannot be found.…”

“…This distance is a characteristic of the stress distribution. Details of the procedure for the determination of the effective volume, distance and stress at the notch tip with a schematic presentation of a local stress criterion for fracture emanating from notches were described in the literature [21]. As an example, the curve of the stress gradient (Fig.…”

Characterization of Fracture Toughness Properties of Aluminium Alloy for Pipelines

“…The chemical composition of the material studied was detected by a scanning electron microscope (SEM) measurement. The weight composition of the tested material is given in Table 1: listed values are consistent with those reported in literaure for the A1 aluminum alloy [29]. Some classical tensile tests were performed at room temperature, in order to obtain the mechanical properties of studied alloy.…”

Effect of saline corrosion environment on fatigue crack growth of 7475-T7351 aluminum alloy under TWIST flight loading

“…This appears to be the Al 7 Cu 2 Fe compound that is present in alloys of the 7000 series and is formed during solidification of the alloy. The morphology and composition of this intermetallic compound does not change in response to heat treatment, but its mechanical shape can reduce its size [6,7,25,28]. Fig.…”