Recrystallization and grain growth
are mechanisms that alter the microsctructure of a material without necessarily altering the phase.
The phenomenon can be explained by the more intensive grain growth
of the mechanically activated mixture due to the relatively long heating period (the heat-up rate was 2[degrees]C/min) and holding time.
According to Mikkola, trade secrets abound in the single crystal blade production world because companies don't like to share their proprietary methods of eliminating these grain boundaries and inducing grain growth
, a process known as "seeding.
Below certain temperature, the SMAT sample can maintain its ultrafine-grained surface layer since the temperature is still not high enough for severe grain growth
Since the nucleation of the twin-oriented domains takes place at the growth front of the crystal, the formation of the twin substructure is possible only if the grain growth
takes place in the <111>crystallographic direction.
No difference was noted between control and source:sink manipulated plants for allocation of dry matter to straw of spike at the beginning of rapid grain filling stage, but maximum straw of spike dry matter after anthesis significantly decreased after source:sink manipulation (Tables 1 and 2), indicating that glumes and awns can be effective on grain growth
during first half of seed filling period, but after this period, demand of kernel needs a stronger dry matter supporter, i.
The nano-particles in MMC act to inhibit grain growth
and hinder the movement of dislocations, thereby stabilizing the structure under elevated temperature and load," says Frost & Sullivan research analyst Rajesh Kannan.
According to ESL, use of a porous alumina weight or cover plate during the manufacturing process promotes creep flattening during the initial sintering process, without the grain growth
experienced in a second firing.
Figure 5 shows that during annealing at 375 K some grain growth
While nitrogen can be extracted from the soil, studies have shown that under drought conditions, nitrogen remobilisation from vegetative tissues is particularly important for grain growth
By carefully controlling temperature and timing of the heating phase, the Johns Hopkins engineers allowed about 20-25 percent of the copper's crystals to grow to a larger size in a process called "abnormal grain growth
However, heating too high will cause grain growth
in the overheated austenite, making the finished tool brittle.