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A number of numerical and analytical thermal models have been carried out so far.
Introduction Grinding is a stochastic process based on the simultaneous action of multiple grains embedded in a bond.
Apart from this, it should be considered and controlled a large number of variables and parameters that influence the process; there may be damage and errors that affect the quality of ground parts.
Grinding is a sum of a large number of micro-machining processes, where each acts as an abrasive grain cutting tool independent.
The former corresponds to the interaction of each abrasive grain with the ground surface; the latter is temperature reached by the workpiece along the grinding due to the global action of the whole tooth.

B is a subcooling parameter depicted in Eq. 7: B=PrvclTsat-T∞Prlcv(Tstrip-Tsat) (7) where Pr is Prandtl number, c is the specific heat capacity and T is the temperature.
Grain growth model After recrystallization is finished, the newly formed austenite grains start to grow.
Grain growth is calculated by Eq. 18.
Grain growth logic is implemented to the virtual rolling model as follows: when recrystallization is on-going, grain size is reset to a minimum value of 10 um.
Grain size calculation is also included on the same axis as recrystallized fraction to show both in the same figure, as grain size and recrystallization are dependent on each other.

From the figure, with infiltration procedure number increasing, the titania sol amoun 50μm 50μm A B Fig.2 SEM images of carbon-titania composites.
From the figure, the titania gel grains can been found in some pores of template.
However, it can also be showed that many pores have little or no TiO2 gel grains.
From Fig.4, the titania gel grains adhere the wall of template, and more titania sol was infiltrated into the template than those infiltrated with the first route.

The multiple granular sodium bentonite grain size: d90 = 0.85 d10 = 0.074, which was subjected to activation by being milled once in a disintegrator.
For the tested concrete, Portland cement CEM I 42.5 R, aggregate broken basalt grain size of 16 mm and sand grains to 2 mm were used.
The addition of bentonite to the trial cement batch caused an increase in its volume, and this in turn affected the volumetric efficiency which ultimately reduced the number of individual components for 1 m3 of concrete.

Oxide glasses are the best known group of non-crystalline materials and comprise a large number of glass families.
(1) Here kB denotes the Boltzmann constant, T the absolute temperature, and Nion the number density of mobile ions.
In applying Eq. 1 we use the number density of Na ions, which is known from the glass composition.
Highly cooperative string-like atomic motions were observed in the grain-boundary region.
String-length distribution functions were reported for a grain boundary with a coincidence site lattice and another grain boundary without coincidence site lattice at 800 and 1400 K [29].

Number of publications per year related to SKP.
Fig. 1 shows that number of publications per year related to SKP dynamically increased from 88 publications in 1996 to 421 publications in 2013.
Measuring instruments The phenomenon described above has been used to construct a number of measuring instruments including the SKP.
It is seen in Fig. 10a that the grains which did not undergo corrosion are visible (D and G areas).
Intergranular corrosion between C and D grains also occurs.

On the grain boundaries in the scale, iron-silicate was found.
The reaction of an oxidant and a metal may depend on a number of factors Depending on temperature, time, atmosphere conditions and steel chemistry, energy barriers develop, which must be overcome for an oxide to grow.
Above 1170ºC, the eutectic temperature of FeO-Fe2SiO4, the oxidation is strongly accelerated, due to the presence of the liquid phase at the interface and in the grain boundaries.
On the grain boundaries in the scale, iron-silicate was found.
Above 1177ºC, the eutectic temperature of FeO-Fe2SiO4, the oxidation is strongly accelerated, due to the presence of the liquid phase at the interface and in the grain boundaries

Austenitic stainless steel generally poses problems in the measurement of strain due to its coarse grain and crystal texture.
The test was stopped when the number of cycles reached 1 x 10 7.
Austenitic stainless steel poses problems for measurement in the micro region due to its coarse grain and preferred orientation.
With respect to the grain size, that of the heat-treated specimen was greater than that of the pre-treatment specimen.
For the specimen used in the strain measurement, grain refining was conducted by cold rolling.

Coating structure Coating structure may be addressed to a number of levels.
A second approach consists in introducing secondary phases and even micro pores in order to inhibit grain growth by pinning the grain boundaries.
Another way to adapt coating properties is to favour particular grain growth orientations.
The flattening of grain boundary ridges was observed to suppress accelerated oxidation in those areas.
As there are a number of techniques to produce such a hot gas stream, there are also a number of different spraying tools.

By using the advantages of the thixoforming process, it is possible to reduce the number of forming steps, in some cases to a single one.
A number of examples are shown in table 1 (after Hirt et al. [1]), which illustrate the variety of achievable components.
Increasing the holding time lead to grain growth, migration of entrapped liquid (intragranular) to non-entrapped liquid (intergranular), and agglomeration of solid grains.
- due to the high temperature involved in the process, austenitic grain growth is significant.
A known solution to control the grain size at high temperatures is to use micro-additions of titanium to generate TiN precipitation and induce a "pinning" of the grain [59-61].