grain growth वाक्य
उदाहरण वाक्य
मोबाइल
- Thus there is a driving force to produce fewer, more misoriented boundaries ( i . e ., grain growth ).
- However, there is some built-in self-control due to inhibition of matrix grain growth by the dispersed phase.
- The cooling rate can be used to control the rate of grain growth or can even be used to produce partially martensitic microstructures.
- Grain growth is suppressed by rapid heating over the range 1500 1900 �C; this minimizes the time the material has to coarsen.
- "' Grain growth "'is the increase in size of grains ( crystallites ) in a material at high temperature.
- And, here again as with Dye 3, steady state in grain growth was reached and continued through the post-glacial climatic optimum.
- However the grains are unstable with respect to grain growth and so will grow during annealing until the particles exert sufficient pinning pressure to halt them.
- Post deformation micro-structural studies were conducted on the formed components in order to analyze the microstructure in terms of grain growth, grain elongation, cavitations, etc.
- The addition of scandium to aluminium creates nanoscale Al 3 Sc precipitates which limit the excessive grain growth that occurs in the heat-affected zone of welded aluminium components.
- For example, researchers in Tianjin Cemented Carbide Research Institute add 1 % TaC into cemented carbide drawing dies to inhibit grain growth and refine grain size in the sintering process.
- If stress oscillations appear before reaching the steady state, then several recrystallization and grain growth cycles occur and the stress behavior is said to be of the cyclic or multiple peak type.
- An excimer laser or, alternatively, green lasers such as a frequency-doubled Nd : YAG laser is used to heat the amorphous silicon, supplying energy necessary to nucleate grain growth.
- Afterward, a thermal treatment, or firing process, is often necessary in order to favor further polycondensation and enhance mechanical properties and structural stability via final sintering, densification, and grain growth.
- Grain-boundary sliding is grain-size dependent and favors small grain sizes, since diffusion pathways are relatively short, and secondary mineral phases may enhance the process since they hamper grain growth.
- Directional solidification is when the material solidifies at one end and proceeds to solidify to the other end; this is the most ideal type of grain growth because it allows liquid material to compensate for shrinkage.
- In common with discontinuous grain growth is characterised by a subset of grains growing at a high rate and at the expense of their neighbours and tends to result in a microstructure dominated by a few very large grains.
- Afterwards, a thermal treatment, or "'firing "'process, is often necessary in order to favor further polycondensation and enhance mechanical properties and structural stability via final sintering, densification and grain growth.
- Abnormal grain growth is often recorded as an undesirable phenomenon occurring during the sintering of ceramic materials as rapidly growing grains may lower the hardness of the bulk material through piezoelectric effect and thus in these systems AGG is avoided.
- In comparison to phase transformations the energy available to drive grain growth is very low and so it tends to occur at much slower rates and is easily slowed by the presence of second phase particles or solute atoms in the structure.
- The size distribution of ice crystals changes with depth and approaches the Normal Grain Growth law via competing mechanisms of fragmentation ( producing smaller polygonal grains ) and grain boundary diffusion ( producing larger, vertically compressed, horizontally expanded grains ).
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