A model for predicting fracture mode and toughness in 7000 series aluminium alloys

Three-Point Bending of Heat-Treatable Aluminum Alloys: Influence of Microstructure and Texture on Bendability and Fracture Behavior

“…However, this is not seen to the same extent in the recrystallized material in Figure 11(d). Dumont et al [20,21] discussed the factors that influence the fracture resistance, i.e., yield stress inhomogeneity, strain hardening, and grain boundary precipitation. Here, yield stress inhomogeneity means the differences in yield stress between the grain interior and precipitate-free zones along the grain boundary.…”

Micromechanics-based model for trends in toughness of ductile metals

“…For instance, these countervailing trends occur in precipitation hardening of aluminum alloys, where the precipitate do not, in general, take part to the failure process. An example can be found in a recent study by Dumont et al [42,43] on the fracture toughness of 7000 Al alloys: an under-aged Al7040 characterized by s 0 ϭ 385MPa, nϷ0.2 is compared to the over-aged alloy characterized by s 0 ϭ 460MPa nϷ0.1 Both materials primarily fail by a ductile void growth mechanism (which is not true for the peak-aged alloy showing intergranular fracture). Secondly, the present model does not incorporate a void or microcrack nucleation criterion.…”

Effects of Microalloying Tin and Combined Addition of Silver and Tin on the Formation of Precipitate Free Zones and Mechanical Properties in Al-Zn-Mg Alloys

“…Research into the characterization of PFZs is essential because they are believed to affect greatly the mechanical properties of these alloys. [1][2][3][4][5][6] Our work has also revealed that presence of PFZ adversely affects the fracture properties of the alloys by correlating mechanical properties to microstructual parameters. [7][8][9] It is known that small additions of various alloying elements (microalloying element) often change the morphology, spatial distribution and size of precipitates.…”