subgrain

subgrain

[′səb‚grān]
(metallurgy)
The portion of a metal crystal or grain with an orientation that differs slightly from the orientation of neighboring portions of the same crystal.
References in periodicals archive ?
Characteristic traces in diffractograms help distinguish various deformational and annealing processes, such as grain coarsening, refinement, subgrain formation, grain rotation, slip, twinning, dynamic recovery and recrystallisation.
When the annealing temperature increases, the nucleation generates at the original high angle grain boundaries or the high angle subboundaries which are formed through the growth of the subgrain.
According to this, a decrease in tensile strength is mainly influenced by the dispersion of cementite particles more than by the subgrain formation.
The rocks present undulose extinction, deformation twinning, and evidence of dynamic recrystallization processes, including grain boundary migration, subgrain rotation recrystallization in quartz and plagioclase, and stylolitic surfaces in calcite.
Grain and subgrain characterisation by electron backscatter diffraction.
Six different types of quartz were distinguished in the aggregates with respect to their microstructure, deformation, and recrystallization: quartz with undulose extinction (Q-ue), quartz with patchy extinction (Q-pe), quartz with serrated boundaries (Q-sb), quartz with bulging recrystallization (Q-BLG), quartz with subgrain rotation recrystallization (Q-SGR), and quartz with grain boundary recrystallization (Q-GBM) (see Table 5 and Figure 7).
After chemical etching, the metal of the local the blade contained a distinctive struc-ture with the subgrain size of 15-40 [micro]m.
Quartz appears dynamically recrystallized, with evidence of moderate grain boundary migration and subgrain rotation.
The K-feldspar has local development of mottled texture due to variable inversion to triclinic microcline, and quartz has rare subgrain development.
Contents subgrain of koksikiem to 10%- Calorific value Qir from 27100kJ / kg- The ash content of 10% Ar- Sulfur content 0.
A considerable attention was also devoted to the examination of the subgrain and grain anisotropy, and three mutually perpendicular plane sections were examined.
The content of subgrain koksikiem to 10%- The calorific value Qir from 27100kJ / kg- The ash content of 10% Ar- Sulfur content 0.