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However, conventional fusion welding processes result in deterioration of the good mechanical properties of these ultrafine-grained materials due to the drastic grain growth of the ultrafine grains.
Thus, this process would effectively alleviate deterioration of mechanical properties of the ultrafine-grained materials.
Due to these positive factors, ultrafine-grained materials show great potential for practical application in the near future.
However, conventional fusion welding processes result in drastic grain growth of ultrafine grains in the heat affected zone (HAZ), which causes deterioration of the excellent properties of these materials [11,12].
Thus, FSW is potentially an effective welding process to retain the high mechanical properties of ultrafine-grained materials.

However, the literature studies have shown [2 – 24] that a wide range of DBM can be produced on the basis of magnesia binder (plasters, mortars, paint formulations, primer and putty, mixtures for floors, etc.) with improved physical-mechanical and performance properties.
To study basic properties of developed magnesia dry mixes; 3.
For studies of properties of MDBM mixtures were prepared with binder, filler and additives.
Results and discussion The results of determination of mortar properties are shown in Tables 1 and 2.
This solution prevents the formation of condensation inside the wall, and resists cold and other unfavourable factors inside the premises.

As the piezoelectric quartz crystal has high Q value and stable properties of the chemical and physical, people often use it to stabilize the frequency of the signal source and have achieved great success.
So the above factors should be comprehensively considered to determine the thickness, size and position of the electrodes.
After signal processing, it can suppress the interference factors on the output frequency, so as to get a better force sensitivity coefficient and stability.
So we should control carefully the incentive level according to different requirements in use process of the resonator, making the resonator work in state with better comprehensive properties [6].
Effect of Surface Structure on Properties of Integrate Quartz Resonator [J].

The aim is on the one hand to build structures more tolerant to damage, and on the other hand, to reduce the effect of this type of solicitation due to the severe degradation of the mechanical properties of these materials under impact damage [4], [5].
The authors showed that the impact energy level and the number of impacts are the main factors of damage.
A variety of research works are made on glass polyester composite material [9-11] which are used in various engineering industries because of their superior performance and tailor made properties.
Selzer et al. [15] investigated the mechanical properties and failure behavior of carbon fiber-reinforced polymer composites under the influence of moisture introduced into the specimens by immersion in distilled water.
Friedrich, Mechanical properties and failure behavior of carbon fiber-reinforced polymer composite under the influence of moisture, Composite 28A (1997), 595-604

Structure and photocatalytic properties of fixed porous TiO2 composite film on steel prepared by plasma electrolytic oxidation Yunlong Wang 1, a, Miao Wang2,b,Maosen Xu3,c and Yuemei Qin 4,d 1Center for photon Manufacturing Science and Technology, School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013,China 2Research institution of new materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013,China 3School of Power and Mechanical Engineering,Wuhan University, Hubei,430072, China 4Department of electronic and electrical engineering, Jiandong Polytechnic College, Changzhou, 213022, China Keywords: TiO2 composite film, photocatalytic, plasma electrolytic oxidation, steel Abstract.
The photocatalytic properties of the film were studied by testing the photocatalytic degradation of Rhodamine B.
In recent years, oxide based films with desirable properties worked on the surface of light Metals, especially Al, Mg, Ti and their alloys have been reported to prepared by means of a method called plasma electrolytic oxidation (PEO)[5,8-9].
The photocatalytic properties of steel fixed TiO2 composite film were primarily evaluated.
There are many factors that affect the photocatalytic activity of TiO2 films, such as crystalline structure, surface area.

Tunnel's tunneling already becomes the primary factor of the efficiency about the mine coal produce.
Shenyang North Heavy Industry Group, conducts a study about it and develops with independent intellectual property rights of the boring machine in China.
The impaction of the depth, energy, speed, diameter and other parameters are also affecting the distribution of rock stress.
The hole depth of penetration also affect the amount of disk cutter, it is shown in Fig.1.
The design of the cutting head is consideration of the changes in rock stress, it is shown in Fig.2 .The main factors affecting the rock stress are impact depth, energy, speed, diameter and other parameters. it is shown in Fig.3.

The mechanical properties of these materials are shown in Table 1 both for GLARE and Aluminum.
Therefore, to optimize the best parameters, three main factors have been chosen: BHF, CP, and BHG.
Considering these factors, Taguchi orthogonal array is L16, which reduces the number of experiments to 16 and that is quite significant.
The interaction properties were all set using the penalty function algorithm and set the friction factor to 0.005.
The elastic and plastic properties of aluminum and the elastic properties of glass fiber with engineering constants were imported into the material property module.

The scratch damage resistance and impact strength of PMMA sheets are necessary factors that have to be concerned by manufacturers.
A potential technique to improve the mechanical properties of polymer composites is brought about the concept in the crosslinking formation, without covalent bonds between them.
IPNs typically possess optimally mechanical and physical properties because of the synergistic effect of individual polymers [4].
The IPN technique is the method of simultaneous formation that can be used for mixing of organic and inorganic components at the monomer level to resolve a compatibility problem, IPNs typically possess optimally mechanical and physical properties [5].
Choi, Surface mechanical properties of poly (urethane acrylate)/silica hybrid interpenetrating polymer network (IPN) coatings, Progress in Organic Coatings, 97 (2016), 166-174

But it is should be noted that material wear is a systematic behavior, there are many factors affecting the wear behavior, such as material microstructure and hardness, ambient temperature, applied load, etc.
,among of these, the applied load is an important factor affecting the material wear[8].
Tribological properties of laser cladding high-temperature self-lubrication composite coatings [J].
Microstructure and tribological properties of laser clad CaF2/Al2O3 self-lubrication wear-resistant ceramic matrix composite coatings [J].
Microstructure and tribological properties of laser cladding Ni45-CaF2-WS2 self-lubrication coating [J].

Eccentricity is the important factor to affect the carrying.
When other factors remain unchanged, the change of oil supply pressure will lead a change about bearing flow.
With the oil temperature increasing, the viscosity of the oil reduces, and the flow properties of oil will be improved, so that the friction loss of bearing will reduce, and the heat will reduce.
Based on these factors, four factors and four-level orthogonal test can be obtained, and experimental results are shown as Table 2.
The P-value test was used to determine which factors are significant in affecting the results.