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Treatment at high temperature, respectively 1050°C/1h (fig.2c), makes the structure with very big grains, each of them having inside many lamellar distribution of a and b solid solution.
ACKNOWLEDGMENTS This work was supported by Romanian POSDRU project number 60203.

The mechanical properties of Al-Si alloys depend, besides the Si, Cu, Mg and Fe-content, more on the distribution and the shape of the silicon particles, the grain size, dendrite arm spacing, porosity distribution or profile, size, volume and morphology of intermetallic phases [1-4].
A number of factors define the metallurgical structure in Al-Si castings and that determines the properties.

Numbers of pyrolysis studies have been carried out based on combined feedstock such as sewage sludge with rice waste [3] and sugarcane bagasse with petroleum residue [4].
Then, dried coconut shells and rice husks were grinded into powder with grain size of (<1 mm).

After completion of the forging process, billet model will be formed as a ring internal gear, which is designed with parameters of tooth number 36, module 0.15, diameter 9mm, height 4mm, addendum diameter (inner diameter) 5.052mm.
Chang, Superplastic micro-forming with a fine grained Zn–22Al eutectoid alloy using hot embossing technology, J.

It depends on a number of factors such as the pH value of the solution, the degree of swelling of wood filler particles, the temperature, the presence of active groups, etc.
It is known that the hydration of cement grains with a wood filler is greatly different from the normal concrete.

Currently, a large number of different methods of surface modification are used in production.
The underlying hardened layer, the thickness of which can reach up to 1 ... 1.5 mm, depending on the technological modes of processing and the means of technological equipment, is a ferrite at the grain boundaries of which there is a small amount of iron and tungsten carbides.

whereis the initial concrete strength, is the parameter determining an increase in concrete strength due to lateral compression, is the yield strength of spiral reinforcement steel, is the deformation of uniaxially compressed concrete at maximum stress, is the initial modulus of elasticity of concrete, is the modulus of elasticity of spiral reinforcement steel, is the cross-sectional area of the spiral reinforcement is the spiral reinforcement pitch, is the diameter of the concrete core inside the spiral reinforcement, is the concrete axial strain at the i-th calculation step, is the corresponding tensile strain of the spiral reinforcement, is the stresses in spiral reinforcement at the i-th calculation step, is the spiral reinforcement prestress (if any), is the relative lateral pressure on the concrete core at the i-th calculation step ( ), mс is the material coefficient, determined experimentally (for heavy concrete, it is recommended to adopt mc=9, for fine-grained
To consider different stiffnesses of normal sections along the length l, the rod is divided along the length into an even number of equal sections (at least six).

In the manufacture of microsections, samples were processed on 4 numbers of sandpaper (sanding), followed by polishing by standard technology.
Grain size effect on wear resistance of a nanostructured AISI52100 steel.

Chemical precipitation technique has many advantages such as mild reaction conditions, less energy consumption, simple equipment and there are large numbers of variable factors in the preparation process which can be used.
The crystallite size of copper is calculated using Scherrer’s equation where, D is the grain size, K is a constant taken to be 0.94, λ is the wavelength of the x-ray radiation, β is the full width at half maximum and θ is the angle of diffraction.

Moreover, from outside to inside, there is a great decrease in the number of debris of microbial mycelia, accompanied by a decrease in CaC2O4 content of the rock.
Moreover, crystal grains of calcium oxalate are regular and dense because of participation of microbes.