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Test material of workpiece is aluminium alloy（7075-T651）which mechanical properties are shown in Table 1.
Table 1 Mechanical properties of aluminium alloy (7075-T651) Material properties Computation unit Numerical value Tensile strength [MPa] 570 Yield strength [MPa] 505 Elongation [%] 11 Maximum shear stress [MPa] 330 Hardness [HB] 150 Density [g/cm3] 2.85 Design of Experiment.
In a turning operation there are many factors that can affect the cutting force.
In this paper these are selected as design factors while other parameters have been assumed to be constant over the experimental domain.
The experimental results are analyzed with analysis of variance for the second order response model developed for Dx, Dy and Dz, which is used for identifying the factors and the experimental errors significantly affecting the performance measures.

It was proposed that the excellent mechanical properties ensure the as-sprayed coating with low friction coefficient and wear rate under different lubrication conditions, In addition, the existence of pores was benefitted for the improvement of tribological properties under boundary lubrication.
Silicon element is added to Ni-B-Si systems to improve the self-fluxing properties.
Fig.3b shows a higher magnification view of the cross section of Ni-based coating, it can be seen that large pores and cracks exist in coating, which is harmful to the mechanical properties of coating.
Thus, excellent mechanical properties of Ni-based coating are the main factors for the improvements of tribological properties at heavy load.
It was proposed that the excellent mechanical properties ensure the as-sprayed coating with low friction coefficient and wear rate under different lubrication conditions.

Numerous studies have examined the mechanical properties of concrete/mortar containing FRCA.
The mechanical properties of the concrete mixes were evaluated using flexural and compressive strength tests.
This alters the concrete's microstructure and mechanical properties.
Fresh and mechanical properties of concrete containing recycled fine aggregate as partial sand replacement. 
Influence of local additions on the physicochemical and mechanical properties of cement paste. 

Urban sewage treatment process and selection principles Liu chunmei, Wang zhengyang JiangSu Institute of Architectural Technology, Xuzhou, Jiangsu 221116, China Keywords: city sewage treatment; selection principle; problems; Countermeasures Abstract: With the rapid development of modern society and economy, environmental problems have become increasingly prominent, especially the city water environment worsening, exacerbating the shortage of water resources, affecting people's physical and mental health, which has become the serious restriction factor of sustainable development of the city.
Biological contact oxidation unit in the form of many, according to the state of the water can be divided into Split and DC-style, from the oxygen can be divided into aeration, mechanical aeration, sprinkler type and jet aeration.
Sewage treatment process selection 2.1 Sewage treatment process selection basis and principles Process to select technical and economic factors should be considered.
The infrastructure investment programs and the annual operating expenses at the standard rate of investment income, after taking into account compounding factors, converted into useful life of the end of each year equal reimbursement of costs - annual cost, in comparison to the economic desirability of the lowest cost solution.
Problems and countermeasures of urban sewage treatment development measures 3.1 Issues facing the development of urban sewage treatment Wastewater treatment technology behind our sewage treatment stage using technology compared with the same period the level of foreign technology is still very backward, there is always a low efficiency, high energy consumption, high maintenance, automation and low defects, thus affecting their sewage treatment plant competitive tender .

The mechanical properties, such as elastic modules and fracture toughness, of the resulting coating are determined using the indentation tests.
Qiao et al. [6] indicated that worn out of the WC grains and the lifting of entire splats was affecting the sliding wear.
In addition, the effect of carbide size and cobalt content on the microstructure and mechanical properties of HVOF WC-Co coating were examined by Chivavibul et al. [7].
They analyzed the microstructures of the resulting coatings and they showed that the binder phase was a key factor affecting the microstructure of the coating.
Shinoda, Effects of carbide size and Co content on the microstructure and mechanical properties of HVOF-sprayed WC-Co coatings, Surface and Coating Technology, 202, 2007, 509-521

Hexagonal close-packed and lower symmetry metals often exhibit anisotropic mechanical properties because the dominant slip system forbids slip in certain lattice directions.
Likewise, the mechanical properties perpendicular to the rod axis are dominated by the interaction of grains with hard and soft plastic response.
The flattening off of the {0002} strain after applied tension is a consequence of the onset of PY slip affecting <0002> grains.
The EPSC can incorporate twinning as a mode of deformation, although, up to the present, it cannot include up-dating the texture which as we have seen plays a major part in the mechanical properties [10].
Conclusions Measurements of the residual and in-situ strains and the texture of Zr-2 rod by neutron diffraction have lead to an understanding of the factors which govern the mechanical behaviour of the material.

And the factors influencing the thermal conductivity of aluminum alloy is summarized.
Introduction The aluminum alloy, which has some key properties like high thermal conductivity, excellent mechanical properties, easy to surface treatment and low price compared with gold, silver, copper which is high thermal conductivity materials, has been widely used as the heat dissipating material.
The mechanism, effect factors and improving measures of thermal conductivity are introduced briefly.
Effect of the Chemical Elements Chemical element in the aluminum alloy is one of the main factors that affect the performance of thermal conductivity.
Effect of a short solution time on microstructure and mechanical properties of modified Al-7wt%Mg alloy .Journal of Light metals,2(2002)27-36

The stability of the properties of the T8 as welded condition was investigated after a 1000 hours at 85°C exposure.
The second one tested by DLR aimed at investigating the local properties of the microstructure.
Fatigue tests were performed on two types of specimens representing two stress concentration factors (un-notched Kt 1,036 and Kt 2,3 with a 6,35 mm hole diameter) and according to ASTM E466-82.
The good ductility of the weld nugget and the surrounding zones might also explained the promising behaviour in fatigue crack growth and in fracture toughness but other factors such as residual stress field [3] may also contribute.
Even if the post welding aging provides a hardening in the surrounding zones of the weld nugget, the global static and fatigue properties of the T8 post welding aged weld are similar to the T8 as welded condition.

Common used self-lubricating tool has self-lubricating function, but its mechanical properties are greatly reduced.
But, solid lubricants may lead to the decrease of mechanical properties of tool materials.
ZrO2-TiB2-Al2O3 nanocomposite ceramic die material with good mechanical properties was fabricated successfully.
However, it also can reduce mechanical properties and wear resistance of the ceramic tool material.
The mechanical properties of nano-micro composite materials can be greatly improved.

Pulse cleaning process affected the durability of the filter.
Porosity and mechanical strength of the filter, that are basic properties of filter elements, were 58% and 10 MPa.
Other factors such as pulse valve opening time and face velocity etc., were fixed.
The properties of the filters were analyzed after thermal shock and pressure shock tests.
Pulse cleaning process was shown to affect the durability of the filter.