Abnormal grain growth in Ni-5at.%W

Effect of Annealing Atmosphere on the Recrystallized Texture and Abnormal Grain Growth of Ni–5%W Alloy Sheets

“…Indeed, hydrogen atmosphere increases the diffusion and mobility of atoms in the matrix, and thus, increases the grain boundary mobility in the alloy. [7] Indeed, oxygen in argon atmosphere diffuses into grain boundaries and decreases their motion. [14] The increased mobility of the grain boundaries accelerates the kinetic of recrystallization and then promotes the development of the cube orientation which has an advantage to grow during primary recrystallization due to a stored energy difference between the cube orientation and the cold rolling orientations.…”

“…[5] Like this, the superconductor will grow epitaxially on the cube textured substrate. [7,8] After strong deformation by cold rolling, a copper type texture is developed with the following main components: the aluminum component (S {123}<634>), the copper component (C {112}<111>), and the brass component (B {110}<112>). [6] To obtain a highly textured cube substrate, the material must be strongly deformed and annealed at high temperatures.…”

“…The cube orientation fraction is very low (about 1%) in the deformed state. Witte et al [7] studied the influence of the annealing atmosphere on AGG. [8][9][10] Let us note that during recrystallization, at high annealing temperatures, the non-cube grains can grow abnormally and prevent the desired hypertexture.…”

The Project SupraMetall: Towards Commercial Fabrication of High‐Temperature Superconducting Tapes

“…A detailed study of AGG in Ni–5 at%W showed that all minor texture components could grow abnormally. The only criterion was that they exhibited HAGBs relative to the cube grains . Also the annealing atmosphere had a strong influence on AGG.…”

Mechanical Properties of Nanocrystalline and Ultrafine‐Grained Nickel with Bimodal Microstructure

“…The most discussed reason is the pinning effect due to segregating elements and particles, [18] which was investigated for saccharin in nickel as it was used in our investigations by Matsui et al [22] and Kobayashi et al [20] while Witte et al [25] investigated the influence of tungsten in rolled sheets. The basic principle is the abnormal grain growth of some special grains while all other grains remain small.…”