Deformation and annealing textures of silver wire

Recrystallization Textures of Metals and Alloys

“…Cold drawn Ag wires develop major <111> + minor <100> at low reductions (less than about 90%) as do other fcc metals, whereas they exhibit major <100> + minor <111> at high reductions (99%) as shown in Figure 18 [32]. This result is in qualitative agreement with that of Ahlborn and Wassermann [33], which shows that the ratio of <100> to <111> of Ag wires was higher at 100 and -196 o C than at room temperature.…”

“…This was also confirmed by microstructure studies [32]. Figure 18 shows the annealing textures of drawn Ag wires of 99.95% in purity, which shows that drawing by 61 and 84% and subsequent annealing at 250 o C for 1 h gives rise to nearly random orientation.…”

“…It is noted that the annealing texture is diffuse at the transient stage from <100> to <111> (5 min in Figure 20 and Figure 19d). The <100> to <111> transition is associated with AGG in low dislocation-density fcc metals, which has been discussed in [31,32]. The Rex results before AGG lead to the conclusion that the Rex texture of the heavily drawn Ag wires is <100> regardless of relative intensity of <111> and <100>, as expected from SERM.…”

“…Since the drawing texture is stable, we consider the [111] and [100] fcc crystals representing the <111> and <100> fiber orientations constituting the texture. [32]. It is noted that the slip directions are chosen to be at acute angles with the [100] axial direction.…”

Experimental and numerical investigations of the texture evolution in copper wire drawing

“…In face centered cubic material (FCC), i.e., silver, gold, copper, and brass undergoing rolling or extrusion, the grains rotate toward a preferential orientation, leading to deformation induced crystallographic texture. These texture studies have revealed orientation dependent mechanical properties [11][12][13][14]. The quantitative characterization of the texture is critically important since textures induced by the forming operations affects the subsequent processing operations because of anisotropic flow properties.…”