The mechanisms of anneal hardening in Cu-Al alloys

Modelling solute segregation to partial dislocations for DSC evaluations

“…In the deformed material Stage 2 of annealing gives rise to the main increase in yields stress [2]; also there were yield points in single crystals of these alloys [12]. On the basis of the above considerations and of those of other authors [44], the binding of solute atoms to dislocations appears to be the unique contribution to the heat released in Stage 2 in addition to SRO, since no other processes have been experimentally detected up to now.…”

Influence of thermal cycling treatment on the anneal hardening effect of Cu–10Zn Alloy

“…For TC samples the hardness increases with increase of the degree of prior deformation [11][12][13][14][15][16]. This increase is about 30 HV (in comparison with the initial cold-rolled condition) for 60% deformation, and the anneal hardening effect is more pronounced than for 40% deformation (the hardness increase is about 28 HV) and for For AN samples hardness also increases with the previous cold work [11][12][13][14][15][16], but at a slower rate than in the case of TC samples.…”

“…Also the strength properties of cold worked copper-base alloy systems are increased upon annealing up to the recrystallization temperature. This strengthening effect is termed anneal hardening and it was previously investigated in some copper-based alloy systems [11][12][13][14][15][16][17][18]. It was found that the amount of strengthening increases with both increasing degree of prior cold work and the concentration of substitutional elements.…”

“…It was found that the amount of strengthening increases with both increasing degree of prior cold work and the concentration of substitutional elements. This strengthening effect could be applied to copper alloys in the production of spring materials for electromechanical devices [11,12].…”

The Anneal Hardening and Deformation Softening Behaviors of Nanocrystalline Cu-Zn Alloys

“…Nevertheless, it has been observed that the hardening behavior of the cold deformation coarse-grain copper-based alloys can be induced by low temperature annealing treatment. 11) Previous studies indicated that the effect of anneal hardening in metal and alloys can be attributed to the solute segregation, 12,13) short range ordering (SRO), 14) annealing twins, [15][16][17] and dislocation source limited strengthening. 18) A softening behavior induced by the deformation after low temperature annealing has been found in some metals and alloys.…”