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Magnesium (Mg) is normally used to improve the mechanical properties of the alloy through the precipitation of the Mg2Si and Al2CuMg intermetallics [1].
Heat treatment is one of the major factors used to enhance the mechanical properties of heat-treatable Al-Si alloys, through an optimization of both solution and aging heat treatment given to these alloys.
Eutectic silicon morphology, viz., particle size and shape, plays an important role in determining the mechanical properties of Al-Si alloy castings.
Once the responses, factors (6) and levels have been selected, see Table 3, the next step is to design the experimental runs.
The factors and their uncoded levels are listed in Table 3.

Introduction As one of the most important foundation material in twenty-first Century, because of its own with the special properties of materials, nanophase material has a significant role[1-4] in reducing the friction factor, improving the wear resistance, also the dense and self-repairing performance.
The tribological properties and self repairing effect have been tested.
Static adsorption properties.Due to the heat with friction of raising the surface temperature is the important factors why the surface of machine part is to invalidate.
Conclusion Through the test and analysis results, the following conclusions can be drawn: a) In high temperature and static conditions, RE nanophase composite material has good adsorption on metal substrate, and can be self-repaired in nano level, which shows its good tribological properties.
International Journal of Materials &Product Technology, 2003, 18 (4) : 338-343 [4] Zhang Zhe, Yang Qin, Wu Xian CaCO_3 nanoparticles in 45 # tribological properties of steel surface [J].

Zhang1 1School of Mechanical Engineering and Automation, Northeastern University, Shenyang, 110819 China agongyd@mail.neu.edu.cn, bliuyueming1000@163.com, cneuchj_2008@yahoo.cn Keywords: Micro-grinding, Surface quality, Micro-machining-system, Wear Abstract.
Machining Properties of Micro-grinding The grinding pin currently used in micro-grinding is shown as Fig.1, which holds abrasive particles on the cylindrical side and bottom face to machine different components.
(1) As the present study of mechanism of micro-grinding is still in the initial stage, many factors known and unknown may affect the surface quality, such as the abrasive particle size, the size of grinding tool, the stability of micro-machining system, the dressing of grinding pins and the random distribution of cutting edges, where compares the differences between the micro-grinding and conventional grinding from the machining and tool parameters only.
(2) As the results from theoretical formula and the actual experiment have several magnitudes difference[5], which is caused by uncertain factors in the machining process and the shape and distribution state of particles, but consider it only from the view of grinding parameters, this result is still meaningful.
Fig.5 Wear of micro-grinding pin Conclusion Through the analysis of machining properties from micro-grinding and the grinding pins wear, the comparison of surface quality attained between micro-milling and micro-grinding, the following conclusions can be drawn.

The rock abrasiveness is one of the fundamental parameters of the rock’s mechanical and physical properties, so the investigation on rock abrasiveness can guide the appropriate selection of the bit, the improvement of rock-breaking efficiency, the prolongation of the working time, the reduction of the cost and the improvement of the rock-breaking tools design[1].
Combined with technical parameters, collected through debugging the device, the orthogonal experimental method with three factors and four levels is used to determine the drilling parameters of rock abrasive experiment.
（4）The suggestion is to research the relationship between rock abrasiveness and physical mechanics property in the direction of rock mineral component and cement property to deduce the corresponding relation.
Strojniski Vestnik/Journal of Mechanical Engineering, v 58, n 4, p 263-270, 2012
Assessment of abrasivity by physico-mechanical properties of rocks[J].

The percentage of recrystallized grains of the alloy is found to be affected by dispersoid distribution.
Small additions of zirconium can often improve the properties of high strength aluminum alloys by forming metastable, coherent Al3Zr dispersoids, which have a strong influence on recrystallization, grain size and mechanical properties of wrought aluminum alloys [5-7].
During homogenization, there are two main factors influencing the precipitation of dispersoids, the supersaturation of the solid solution and the diffusivity of the solute in the matrix respectively [7].
Earlier research shows that the precipitation behavior of Al3Zr particles is affected by the heating rates during homogenization treatment [10, 13].
Wei, Effect of Homogenization and Aging Treatment on Mechanical Properties and Stress-Corrosion Cracking of 7050 Alloys, Metallurgical and Materials Transactions A. 38 (2007) 1760-1773

So, we think that both the interfacial capacitance and epitaxial strain may be becoming the crucial factors for size effects in ultrathin ferroelectric capacitors.
In order to describe the size effect of the ferroelectric thin film, some physically based models [14,15] have been developed using first principles simulations or phenomenological approach by considering the above two crucial factors.
In the present study, we extended the Landau-Ginzburg-Devonshire thermodynamic theory by considering the mechanical film/substrate interaction and the film/electrode interface.
The physical properties are uniform within each layer.
It will affect all physical properties of a single-domain ferroelectric film.

The research based on the properties of the occurrence of marine gas hydrate, used the principle of gas hydrate decomposition caused by vibration, by adjusting the excitation intensity, frequency, and amplitude.
Its frequency, amplitude, speed changes have the roles on hydrate reservoir and the overlying sediments, the roles including mechanical vibration, cavitation, shock, vibration acoustics, thermal effects and the formation compaction and many other factors, making pressure - temperature conditions in the hydrate reservoir change.
It based on the characteristics of gas hydrate reservoir, saturation and other factors.
This method integrates technologies such as vacuum and heating, the mechanism is simple, but it has many effecting factors.
It needs to further improve the experimental data in the experimental phase, and quantify the reservoir porous media, pore fluid physical- chemical properties accurately, which affect the decomposition of gas hydrate.

Table 1 represents the dominant parameters affecting the quality of the product.
Its mechanic properties are as table 2: Table 2 Mechanical properties of material material /b MPσ /s bσ σ 10 /%δ Hardness HBS Antirust aluminium 195 0.5 25 30 Experiment equipment and measure results.
The properties of experiment equipment as follows: The experiment was applied by using a J96CY-160 hydraulic pressure machine.
If the precision of simulation is to be improved, it is necessary to analyze the above factors and confirm the revised coefficient.
International Journal of Mechanical Sciences, 2001, 43: 2769-2790

Research on pressure perturbation excited by TEI and its influencing factors, can contribute to accurate pressure design, thus ensuring its reliability, reducing design margin and improving the compactness of the clutch assembly.
All of the mechanical energy converts to thermal energy by friction on the friction interface according to the energy conservation.
So the heat generated from sliding friction should be equal to mechanical energy loss.
Assumed that the friction element material is isotropic, physical properties of the materials keep the same in the process of shifting.
[11] Zhang Jin-le, Ma Biao, Zhang Ying-feng and LI He-yan, Study on the factors affecting temperature field and stress field of the wet shift clutch, Journal of Beijing Institute of Technology [J], 2010, Volume 30, No. 6

Optimization of operation frequency in the evaluation of TBCs using microwave technique Yu’e YANG1 a ，Gaimei Zhang2 b 1.School of Mechanical Engineering, University of Jinan，Jinan, Shandong 250022, China 2.
Reflection coefficient is a function of various parameters such as, dielectric layer’s thickness, standoff distance, dielectric properties, operation frequency, etc.
When an in-contact inspection technique was applied for detecting and evaluating the characters of TBCs, the operation frequency is one of the major factors to affect the reflection coefficient.
Metallic BC thickness does not affect microwave signals, so, in this case, TC was deposited directly onto the metal substrate.
The reflection coefficient and its phase at the sensor aperture can be written as follows: (1) Fig. 2 The structures of rectangular waveguide probes (a) WR28, (b) WR18 (a) a b B A P (b) b B P a A When microwave signals travel within TC systems, the permittivity of the TC affect the electric field, thereby affecting the reflection coefficient.