Effects of Degree of Deformation and Deformation Temperature on Primary Recrystallization Textures in Polycrystalline Nickel

Abstract

The effects of both deformation temperature and degree of deformation on the deformation texture, recrystallization behavior, and recrystallization texture were studied for cold-rolled, high-purity, polycrystalline nickel. Differential scanning calorimetry was used to determine both the stored energy of deformation and the recrystallization temperature, and electron backscatter patterns were employed to reveal both the deformation and recrystallization textures of nickel rolled to either 90 pct thickness reduction at -196°C, 25°C, and 200°C or rolled to 90, 95, and 98 pct thickness reductions at 25°C. The results show that decreasing the rolling temperature below room temperature increased the stored energy considerably and decreased the recrystallization temperature, whereas increasing the rolling temperature had no effect on either the stored energy or the recrystallization temperature. These different rolling temperatures had little effect on the cube texture produced by primary recrystallization. In contrast, increasing the rolling reduction increased the stored energy (at least from 90 to 95 pct), decreased the primary recrystallization temperature, and also sharpened the primary-recrystallized cube texture.

Microstructural peculiarities and textural characteristics of Ni–W sheet alloy after accumulative roll-bonding and annealing

“…Figure 5a shows that their fraction decreases from 13 to 4% with increasing number of ARB cycles in the internal layers. Similar decrease was reported with increasing the rolling reduction ratio [5], most probably because of the decreasing grain size. Moreover, it was demonstrated that the fraction of twin decreases drastically with the increasing annealing temperature from 700 to 1000 °C for hot rolled Ni-14Ni alloys [4].…”

“…Conventional thermo-mechanical processing (TMP) such as rolling followed by annealing treatment allows an easy development of the {001}〈100〉 Cube texture [1]. However, the volume fraction of this Cube texture strongly depends on the thermo-mechanical processing (TMP) conditions [3,5]. It was demonstrated that by increasing the thickness reduction during cold rolling of pure Ni, the stored energy increased and strengthened both the rolling texture and the recrystallized Cube texture sharpened [5], the rolling temperature had little effect on the {001}〈100〉 Cube texture [5].…”

Microstructure and Mechanical Properties of Inertia‐Friction‐Welded Fe–Cr–Ni–Mo High‐Strength Steel

“…Therefore, the area closer to the WZ has a lower YS, and consequent higher degree of deformation decreases the recrystallization temperature. [41] In addition, the temperature of WZ is higher, so serious dynamic recrystallization will occur at the WZ. The maximum temperature distribution models in the peripheral and central regions are proposed according to the temperature of the WZ.…”

Nucleation behavior and formation of recrystallization texture in pre-recovery treated heavily cold and warm-rolled Al–2.5 wt.%Mg alloy

“…The process of annealing results in the formation of strong cube texture ({001}b100N) despite the fact that the cube component shows negligible presence in the deformed structure [4,5]. Various processing parameters including the level of deformation, deformation temperature and annealing temperature can strongly affect the strength and sharpness of cube texture [6,7]. The origin of the cube texture has been explained on the basis of two contrasting theories, namely oriented nucleation (ON) or oriented growth (OG) [8].…”