Serrated grain boundaries in hot-worked aluminum alloys at high strains

Dynamic Restoration Process of Ni-30Fe Alloy during Hot Deformation.

“…12, one serration at the deformed boundary is estimated to contain 8.7 and 9.2 dislocation cells at the strain rate of 0.1/s and 10/s, respectively. The present result is consistent with the report by Konopleva et al 19) that a serration at the deformed boundary is intersected by 4-8 subgrains. Eventually, the critical compressive strain for the commencement of geometric recrystallization is calculated to be 2.9 and 3.2 at the strain rate of 0.1/s and 10/s, respectively.…”

Serration of Grain Boundary in Ni-300Fe Alloy through High Temperature Deformation.

“…Many studies have shown that serrations develop at the grain boundaries during hot deformation for various materials like Al, Al alloys, [1][2][3] Ni alloys, 4) and stainless steels. 4) Serrated boundary plays an important role in the microstructural evolution during the hot deformation.…”

Current issues in recrystallization: a review

“…29 and 34) [226,231,[241][242][243][244]. The latter may be much higher for Al-5Mg, leading to highly meandering GB susceptible to pinching-off [225,226,242,243]. When the elongating grain thickness approaches about 2u (dependent on T, m; ), some opposite GB serrations may meet causing pinching-off (2D view) with shortening of the grains but no further thinning (Fig.…”

“…Moreover, absorption of the subgrain boundaries (SGB) causes the grain boundaries (GB) to migrate locally; the resulting serrations have wavelength of about 2u, and amplitude of u/2 for Al (Figs. 29 and 34) [226,231,[241][242][243][244]. The latter may be much higher for Al-5Mg, leading to highly meandering GB susceptible to pinching-off [225,226,242,243].…”