Effect of second phase precipitates on recovery and recrystallization behaviour of cold-worked Al2024-SiCp composites

Influence of TiO2 particles on recrystallization kinetics of Al–2Mg–TiO2 composites

“…Local plasticity occurs in the vicinity of the particle/matrix interface during annealing [18] due to thermal stress. In general, high dislocation density enhances recrystallization kinetics and consequently AMCs exhibit faster recrystallization as compared to the matrix alloy [6][7][8][9][10][11]19]. In another study, Chaudhury and Apelian [20] observed recrystallization in the as cast Al-Si based alloy that was not cold worked.…”

“…The f/r ratio (where f is the volume fraction and r is the particle size) is the dispersion parameter that decides whether recrystallization would be accelerated or inhibited in a given metal-particle composite. The critical f/r value at which the transition between accelerated and retarded recrystallization occurs is typically between 0.2 and 0.4 m −1 [8]. Recrystallization kinetics is enhanced when the f/r value is lower than the critical value.…”

“…These differences in thermal properties play significant role to alter the kinetics of various metallurgical phenomena, such as recover, recrystallization, etc., during annealing treatment. The generation of greater number of dislocations in particulate reinforced AMCs (Al-SiC, Al-Al 2 O 3 ) owing to their thermal mismatch is known to significantly affect recrystallization kinetics of composites [6][7][8][9][10][11].…”

Effects of Solution Atoms and Precipitates on Isochronal Annealing Behavior of Cold-Rolled Squeeze-Cast SiCw/Al Composites

“…During such forming operations, AMCs may experience an appreciable amount of cold working, which may both influence their further forming operations and degrade mechanical properties, such as elongation to failure and fatigue resistance. Therefore, after forming operations it may be necessary to anneal the composites to recover their deformation ability and mechanical properties [7,[11][12][13][14][15][16][17][18]. To optimize forming operations and mechanical properties of AMCs, understanding the annealing behavior of plastically deformed AMCs is essential.…”

“…Recent studies [8,[12][13][14][15][16][17][18][19][20] have examined the microstructural development in AMCs during annealing operations. These studies focus mostly on AMCs manufactured by powder metallurgy route, including particulateand whisker-reinforced composites, in which fine dispersions of Al 2 O 3 is present.…”