Characterization of Al3Zr precipitation via double-step homogenization and recrystallization behavior after subsequent deformation in 2195 Al-Li alloy

Tuning homogenization of high-strength aluminum alloys through thermodynamic alloying approach

“…The diffusion from the interdendritic second phases into Al matrix is considered as a planar diffusion process for the typical dendrite morphologies along with interdendritic second phases (i.e., M and Cu-enriched [AlCuZnMg] phases) in the as-cast alloys [70,71]. Supposing a spherical second phase, the initial solute distribution is schematically shown in Fig.…”

“…The radius evolution of the second phase with diffusion time by integrating the Eq. ( 2) to the diffusion time t can be described as [70,71]:…”

“…It can be found that the dissolution times of the intragranular second phase and for the uniform solute diffusion are relatively short at 475 °C combined with above analysis about the dissolution of intragranular second phases and solute diffusion kinetics. But longer times might be required for dissolving the eutectic structures and second phases as well as solute diffusion at some temperatures (such as 475 °C) [70,71]. It is known that a-Al + M and [AlCuZnMg] eutectic structures appear at grain boundaries along with a few a-Al + h eutectic or h and Al 7 Cu 2 Fe phases.…”

Quantification of the Effect of Increased Pre‐Deformation on Microstructure and Mechanical Properties of 2A55 Al–Li Alloy

“…The third‐generation Al–Li alloys have received great interest from the aerospace industry due to their excellent properties, such as low density, high strength, great fatigue performance, and relatively good fracture toughness. [ 1 ] For each 1 wt.% Li addition, the density of Al–Li alloys decreases by 3.0%, while the elastic modulus increases by 6.0%. [ 2 ] The 2A55 Al–Li alloy, as a novel ultrahigh‐strength Al–Li alloy is developed by our research group, has attracted strong attention from the aerospace industry due to its excellent tensile properties.…”

Precipitation of Al3Zr Dispersoids under Various Homogenization and Its Effect on Recrystallization in 2198 Al–Cu–Li Alloy

“…Hence, it is necessary to control the recrystallization fraction throughout a series of processing steps, [12,13] such as homogenization treatment. Homogenization can not only eliminate the element segregation caused by rapid solidification speed, [14][15][16] but also control the behavior of Al 3 Zr precipitation. [17,18] According to investigations, [19][20][21] denser, finer, and more desirable distribution of L1 2 -structure Al 3 Zr dispersoids can efficiently enhance the recrystallization resistance during subsequent thermomechanical processes.…”