Flow behavior and microstructural evolution of Al–Cu–Mg–Ag alloy during hot compression deformation

Characterisation of precipitation upon cooling of an AA2618 Al–Cu–Mg alloy

“…At 350 C, the flow stress decreases significantly from 60 s to 600 s. This is attributed to the formation of coarse precipitates which decrease the solute content and therefore reduce solidsolution strengthening. Coarsening of precipitates during further hot deformation was also suggested to be one of the dominant mechanisms -together with dynamic recovery or dynamic recrystallization -responsible for the observed flow softening at temperature over 250 C in AA2618 [17,18] and in other AleCueMg alloys [19]. The tensile curves of AA2618 at 400 C are given in Fig.…”

Experimental and Finite Element Analysis of Flow Behavior of 2A14 Aluminum Alloy during Multi-directional Forging

“…The difference of effective strain in various regions is mainly responsible for the inhomogeneity of recrystallization. It is generally believed that dynamic recrystallization does not occur in aluminum alloys due to its high fault energy, but recently some work have shown that the distinct dynamic recrystallization microstructure can be found during the compression deformation of some Al-Zn-Mg-Cu and Al-Cu-Mg-Ag aluminum alloy systems [19][20][21][22]. In 2A14 aluminum alloys the dislocation easily moves and cross slips, so the steady sub-microstructure can be formed during deformation process, and thus continuous dynamic recrystallization only occurs in the range of sub-grains [23].…”

Hot-compression behaviors of W-50%Cu composite

“…At the beginning of plastic deformation, flow stress increased rapidly and reached a maximum, then the flow stress decreased slowly. The former case occurred when the softening rate was higher than that of the work hardening, while the latter phenomenon occurred when the softening rate was equal to the work hardening rate [9][10][11][12]. The flow softening after attaining the peak stress was prominent only at the highest strain rate (5 s −1 ).…”

“…1. Dynamic recrystallization is generally favored at low Z values, which correspond to low strain rates and high deformation temperatures [9]. By substitution of the above values into Eq.…”