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In a number of studies [3, 4], the laser beam was applied vertically with respect to the surface of the wheel, i.e., at an incident angle of zero.
On the other hand, laser dressing that removes the wheel materials through ablation of the bonding material (resin) to expose cutting grain edges has been tested for aluminum oxide wheels [6,7].
A number of laser processing parameters could thus be predicted.
A large number of CBN particles are connected with vitrified bonds and there is porosity on the wheel surface.

These alloys have effectively no real grain structure, the total atomic disorder leads to the lack of magnetocrystalline anisotropy.
(ii) besides the alloy formation, the mechanical alloying induces a large number of structural defects and the progressive amorphisation of the alloy.
(iii) finally, the presence of a thin layer of benzene, obviously non-magnetic, on the powders surface will leads to a decrease of the number of magnetic atoms in the mass unity reducing thus the global saturation magnetisation of the powders [9].
Acknowledgment This work was supported by CNCSIS – UEFISCSU, project number TE-2012-3-0367.

Compared to the influences of precipitation hardening, other hardening effects like the grain size are usually neglected.
According to this theory the distance in the glide plane depends inversely proportional to the square root of the particle number density in the slip plane.
The particle strengthening according to [2, 3, 14] is calculated under usage of the Taylor Factor M, mean radius r, shear modulus G, Burgers vector b, a constant parameter β, mean obstacle strength F between obstacle and dislocation line and the total number of particles Nv as σp=Mb2 G Nv rβ F3/2 with F=i Fi NiFi
The increase in temperature leads to a significant decrease in volume fraction of the precipitation phase, Fig. 3(b), the particle number density, Fig. 3(c), as well as the yield strength, Fig. 3(f).

Orthogonal experiment table and results Factor Evaluation index Test number A (mm) B (MPa) C (min) D (℃) Bonding strength (MPa) 1 1 0.3 5 250 7.23 2 1 0.4 7 280 7.43 3 1 0.5 9 310 7.76 4 1 0.6 11 340 8.22 5 3 0.3 7 310 8.21 6 3 0.4 5 340 7.56 7 3 0.5 11 250 8.75 8 3 0.6 9 280 8.86 9 5 0.3 9 340 8.63 10 5 0.4 11 310 9.33 11 5 0.5 5 280 8.85 12 5 0.6 7 250 8.93 13 7 0.3 11 280 8.46 14 7 0.4 9 250 8.79 15 7 0.5 7 340 8.45 16 7 0.6 5 310 8.43 The mean values of the four process parameters at different levels are depicted by a line graph, as shown in Figure 4.
As the diameter of the cast steel shot increases, the bond strength of the metal-plastic composite increases first and then becomes smaller, because when the diameter of the cast steel shot is gradually increased, the surface nanometer gradually increases, the roughness gradually increases, which result in an increase in the contact area between the metal and the plastic, then the physical bonding force between the metal and the plastic increases, but when the surface roughness exceeds a certain value, the degree of unevenness of the metal surface is strengthened, the coating adhesion is discontinuous and number of craters on the surface of the metal substrate is increased.
When the grain size is continuously refined, the number of crystal defects in the surface structure of the metal matrix and the activity of the surface atoms increases.

Numbers ST SC(gL-1) FQ(%) IC(gL-1) -1 SDS 1 90 1 0 SLES 5 93 2.5 1 TX-100 8 95 5 Table 2.
Numbers ST SC FQ IC 1 -1 -1 -1 -1 2 -1 0 0 0 3 -1 1 1 1 4 0 -1 1 1 5 0 0 0 -1 6 0 1 -1 0 7 1 -1 1 0 8 1 0 -1 1 9 1 1 0 -1 But the trend and influencing level of these factors on the behavior of foam carrying nZVI are not fully understood.
Therefore, a number of theoretical and experimental studies were done on foam-carrying characteristic.
Transport of carboxymethyl cellulose-coated zerovalent iron nanoparticles in a sand tank: Effects of sand grain size, nanoparticle concentration and injection velocity, J.

Only a limited number of studies have been performed on the use of high calcium fly ash (Class C) as it has low wettibility with molten Al alloy.
The average grain size of Al6061-fly ash composites is smaller than that of Al6061.
The number of corrosion sites observed in Al6061 (Fig 6(a)) was distinctly lower than those present in the microstructure of Al6061-fly ash composites (Fig 6(b), Fig 6(c) and Fig 6(d)).
As a result, the number of corrosion initiation sites increases.

Further research shows that with sintering temperature rises, C3S in belite-barium calcium sulphoaluminate cement clinker gradually increase in number, improved in development, more evenly distributed, and clearer in crystal boundary.
It is found that in Fig.5 (a) and (b) C2S minerals are about 20-30μm, having regular form of round grain and clear boundary.

The results indicate that for the particles of cornstalks between 0 and 0.45mm, the dispersivity and foaming are difficult when the filling amount is beyond 35% because of the fine grain and specific surface area.
Main performance index of compound Polyurethane foam plastic board It is concluded form a large number of experimental results that compound Polyurethane foam plastic board has a better comprehensive properties when the size distribution of particles of cornstalks is 0.45～1.5mm, and the filling amount is 30%.

The sample quality is 500±1 grain, accurate to 0.19.
With the increasing number of weighted factors, the optimization α is needed for different error levels.

Infiltration in the casting process, WC grain by weight to the composite surface layer is mainly embedded in the surface composite layer, the more close to the substrate, WC particles move the more difficult the content is less, rarely seen in the transition layer of WC particles.
WC Local also increased integration into the molten iron in the iron matrix of tungsten and carbon content(As EDAX probe C, B element is not sensitive to atomic number 8 or above only gives the element EDS).