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Moreover, the reliability of metal equipment is determined by structural changes and mechanical properties under the influence of operational factors.
Also, factors affecting the degradation of the mechanical properties of steel are heat, corrosion and mechanical impact during the operation, including technological and unscheduled stops [2].
The magnetic properties of the layer is determined by structure of FeNi3 (strong ferromagnetic).
At this concentration of iron and operating temperature a layer of α-Fe (ferrite) with a bcc lattice and ferromagnetic properties can be formed.
Determination of the Mechanical Properties of Metals by Hardness.

I load force with the experimental data provided by the VIMS laboratory, analyze the biomechanical properties of femur and investigate the influence of anteversion angle parameter on mechanical properties.
I load force with the experimental data provided by the VIMS laboratory, analyze the biomechanical properties of femur and investigate the influence of anteversion angle parameter on mechanical properties.
An important element of the study is the influence of anteversion angle parameters on femoral mechanical properties.
According to the difference from the actual human body, change the anteversion parameters, load forces and study the mechanical properties of femur under different femoral anteversion angle.
The conversion factors for the coordinate system provided by the VIMS system is：Uxx=-0.1993; Uxy=-0.976; Uxz=0.088; Uyx=0.9736; Uyy=-0.2074; Uyz=-0.0953; Uzx= 0.1112; Uzy=0.0667; Uzz=0.9916.

Effect of Polar Molecule Urea on TiO2/Urea ER Fluid Properties and microstructure Suokui TAN 1,2, a, Xiaoping SONG 2,b , Li Qiao 1.c, Hongyan GUO 1,d, Song JI 1,e, Hong ZHAO 3,f 1Ningbo Branch of China Academy of Ordnance Science, Ningbo, China 2 Xi，an Jiaotong University，Xi，an China,3 Dalian University of Technology, Dalian, China atansuokui@126.com, bxpsong@mail.xjtu.edu.cn, cQiaoli040920@163.com , dnbguohongyan@163.com，ejisongnb@126.com，fzhaohong@dlut.edu.cn Key words：Electrorheological effect, TiO2/Urea particles, ER photograph Abstract：By way of mechanical properties test and microstructure observation，the effect of Urea on TiO2 particles has been researched，it has showed that ER fluid activity of the particles were closely associated with urea content.
But ER properties are not enough to meet the engineering needs.
There are many factors to affect the ER properties, particles modifying is one of most important and effective method [7-8].
This paper focuses on the research of morphology and properties of electrorheological fluid of TiO2/Urea under different electric field.
Effect of different Urea on TiO2/Urea GER photograph х225 Conclusions The properties of TiO2/Urea particles ER is increased with electric fields increased, Urea content of TiO2/Urea particles direct decide their properties.30%Urea TiO2/Urea particles ER has the best shear stress that it is 60kPa.

Assembly pressure plays an important role in the factors affecting the performance of a PEM fuel cell.
The variations of water contact angle, gas permeability, and in-plane electrical resistivity with the assembly pressure are also measured to explore the effects of assembly pressure on these physical properties.
Introduction Assembly pressure is an important factor that may significantly affect the performance of a PEM fuel cell.
Lin et al. [6] also investigated the effect of compression on the physical properties of GDL.
The ex-situ tests for the variations of physical properties of GDL with assembly pressure indicate that the noticeable changes in hydrophobicity, electrical resistivity, and pore structure should be the major factors which cause the deterioration of cell performance in high compression conditions over 3 MPa.

Predicting the influence of microporosity on the mechanical properties and fracture behavior of high-pressure die-cast AM50 magnesium alloy X.
A lot of research had been carried on to investigate the typical room temperature mechanical properties and microstructure composition of HPDC Mg alloys [3, 4].
The previous studies indicated that the mechanical properties of HPDC Mg alloy have a quantitative correlation with the areal fraction of microporosity.
The value of K is affected by crack size, geometry characteristics and loading.
Conclusion High-pressure die-cast AM50 alloy exhibits variability in tensile properties.

It is pressed for time to expand our study on pelton turbines, especially for the factors affecting silt erosion of inner wall of pelton buckets.
Padhy[7、8] discussed the factors, such as sediment shape, size and concentration and their erosion on buckets.
Shrestha [9] studied solid-liquid two-phase flow’s motional properties in pelton turbines and thecomputational analysis of pelton bucket tip erosion.
From all the discussions laid before, we got the main influencing factors for the silt erosion on inner wall of turbine buckets.
As there exist direct relationship between sediment concentration and size, the two factors work together to determine erosion level.

Therefore, the rapid drawdown of the water level induced landslides many factors, matric suction against the influence of shear strength is an important control factor.
Dongmei Sun pointed out that the matric suction in addition to affect the shear strength, the slope body cause of unsaturated flow and capillary water saturated zone can also affect the security analysis of the final results.
The change rule and the influence factors of stability of slope in the process of rapid drawdown of water table .
And the change of the soil parameters, the initial water level such factors on the slope safety would cause a great influence, in the future research is necessary for these parameters for further analysis.
But the conventional geological mechanical model test is limited by the model size, causes similar material mechanical properties is difficult to satisfy the similar ratio, and at the same time, size effect also make the model test results reliability is affected certainly.

Hence, it results in the changes in pavement material properties and variation in the pavement mechanical behaviors, that manifesting in longer loading time, lower modulus of asphalt mixtures, increased structural shear strain, etc., which are not conducive to asphalt pavements for resisting rutting deformation, shoving and other damages.
As the vehicle speed imposes a greater impact on the structural performance of asphalt pavements, its change will affect the loading time and equivalent frequency of vehicle load, thereby affecting the properties of asphalt and asphalt mixtures.
Thus, the impact of vehicle speed on the asphalt pavement properties is most important factor in respect of long sustained slope sections.
Thus, it should comprehensively take those factors into account during the determination of the delimitation criterion of long sustained slopes.
In which, the truck speed is the most important factor affecting the asphalt pavement performance of long sustained slope sections.

Nano-particles have an important impact on the performance of the solder, due to large surface area and surface properties [3].
The paper will analyze the mechanisms of nano-particles impact on the melting temperature, wettability and mechanical properties of composite solder from the characteristics of nano-particles, the crystal lattice structure and the interaction between particles and matrix.
The effect of nano-particles on mechanical properties of solders and joints The effect of nano-particles on the mechanical properties of solders.Adding nano-particles, including metals, intermetallic compounds, ceramics, carbon nanotubes, and POSS particles, can improve the mechanical properties of solder, shown in Table 1.
The impact of nano-particles on the mechanical properties of solder joints.Adding TiO2 nano-particles in Sn-3.5Ag-0.5Cu solder the shear strength of the joint increases by improving the content of nano-particle, and shear strength increased by 13.4% with containing 1% TiO2 nano-particles [24].
This will affect the mobility of liquid solders and reduce wetting spreading

In addition to the influence of mechanical stresses during the service, corrosive environment affects metal structures, machine parts, which leads to the process of gradual accumulation of damage.
Metal fatigue is the process of gradual accumulation of damage under the influence of variable stresses (deformations), leading to a change in properties, formation of cracks and destruction [1-5, 15].
Metals and alloys are divided by changing the physical and mechanical properties during fatigue into: cyclically hardened, cyclically softened and cyclically stable.
, V (CRE) Coefficient a, [V] N0, [cycle] φ0 Value 0.05 -6.9 0.4 [V] Standard error 0.01 3.10 0.02 p – single normalizing factor Fig. 4.
Zakirova, Change in mechanical properties of two-layer steel 16GS + 08Kh13 in the process of long-term operation, Metal Science and Heat Treatment, 51 (9-10) (2009), 450-453.