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In this work, the crimp properties of PTT/PET bicomponent filament with different component ratios were investigated.
Generally, the curling produced by mechanical processing can not come up to such effect.
Brand et al. [1] investigated the mechanical principles of natural crimp of fiber.
Luo et al. [4] analyzed the factors affecting crimp configuration of PTT/PET bi-component filaments.
Therefore, this work made an investigation on the self-curled property of PTT/PET bicomponent filaments with three kinds of component ratio under heat treatment, and analyzed the factors affecting the crimp property.

Cobalt was chosen for that purpose because it provides improved properties, high wettability and good adhesion between dispersed diamond particles.
The consequences on the wear resistance of saw blades, as well as on other physical and mechanical properties of the “diamond-cobalt-doping agent” composites were investigated.
Such process technique permits to obtain segments with industrially required properties.
The addition of Si affects the binder tribological and mechanical properties, which improve the adhesion between the binder and the diamond surface [3-5].
By contrast, these factors do not practically influence the wear resistance of the tool.

A suitable crown has good mechanical properties to replace the function of the enamel without hampering the opposing tooth.
The following factors can affect the translucency of zirconia: powder particle size and sintering temperature [7], fabrication method [8], and existence of different additives [9].
Alumina has similar properties as zirconia, but alumina has lower mechanical strength than zirconia.
Lithium metasilicate is known to have good machining properties and high mechanical strength.
The common important characteristics of all-ceramic systems, such as the formation of nanocrystals and the amount of porosity, affect optical and mechanical properties.

Residual stress on the machined surface and the subsurface is one of the most important factors that can influence the service quality of a component, such as fatigue life, tribological properties, and distortion.
The material properties are widely selected to describe the material property more precisely.
Material properties used for FEM simulation.
One of the most important factors that affect the accuracy of FEM simulation of metal cutting is the material flow stress model.
( )( )mn CTBA −+= − 1ε σ (1) Table2 Constants of material constant for AISI 52100 constitutive equation A (MPa) B (MPa) C n m 11.032 4783 12.9×10-4 0.0946 1 Considering the mechanical properties of AISI 52100, since the temperature plays a fundamental rule on the material behavior, so the mechanical properties of AISI 52100 in function of temperature is selected from different authors, the elastic characteristics are chosen from Guo [12] and the thermal characteristics are derived from Umbrello [8].

Processing forming is is one of the important factors of measuring material quality.
Namely, the material is not affected by the influence of the external environment, and can withstand the changes of natural factors and the desturction of surrounding medium.
Therefore, in the choice of materials, you need consider that the materials are not damaged when they are vibrated and shocked. 2) Temperature and humidity Materials have thermal expansion and contraction properties.
If the humidity is big, the metal will rust, and the plastic will not only produce rust, but also make it deform. 3) Climate Ultraviolet rays, rain, ice and snow weather are the bigger some factors affecting material.
Design is inseparable from the material, therefore, designers only have mastered and been familiar with material properties, fully analyse various influence factors , and according to the specific using conditions, reasonably and boldly choice various materials, can design novel products which conform to the trend of the times, meet people's needs.

This paper will study on mechanical characterization of AFM to meet the minimum cutting thickness and influence factors.
Minimum cutting thickness that atomic force microscope mechanical scribing can reach is connected with the diamond tip radius, the physical and mechanical properties of the material being cut.
In this experiment, the specimen is copper, mechanical properties of material surface had great influence on the machining results.
Nanoindentation measurement of aluminum surface properties was shown in figure 4.
Fig. 5 AFM images(Al) AFM mechanical scratching influence factors based on the minimum cutting thickness.Some other factors affect the minimum cutting thickness, such as the smoothness of the surface, noise and other factors can not be ignored [7].

Suppose that there are n factors that affect the structural failure, then the matrix (n×3) which is composed of the sensitivity vector of the n factors is called the sensitivity matrix affecting the structural failure.
Negative sign has opposite effect. δi reflects the relative changes between the factors.
The experimental and statistical data of the mechanical properties of materials indicates that the shear strength [τ] and allowable deformation [λ] of materials also obey normal distribution.
xi(i=1, 2, …, n), and range the factors affecting the structural reliability sensitivity.
Conclusions In this paper the reliability sensitivity of the cylindrical helical spring was analyzed with the variation coefficient method, the sensitivity of various factors affecting spring failure was also calculated.

Steel slag is alkaline slag, with lower temperature, the viscosity increases sharply, the liquidity variation, it is one of the important factors affect the steel slag processing, According to the need for different liquidity of steel slag to choose the corresponding steel slag treatment technology.
According to mineral composition of steel slag, regardless of the quenching or slow cold they are all in crystal mineral, not the vitreous body structure. 2.3 Cementitious property of steel slag Cementitious property of steel slag (steel slag activity) is the important parameters which affects the effect and way of use.
The influence factors to steel slag are mainly basicity and the content of silicate. 2.3.1 Basicity of steel slag Steel slag basicity can evaluate the cementitious property of steel slag to a certain extent, the basicity of steel slag which is used in cement standard should be above 1.8, but the improvement of cementitious property of steel slag is not get along with the development of basicity of steel slag, the alkalinity of steel slag is usually between 3.0～4.5 when cementitious property gets best result [4].
Conclusions (1)The feasibility of steel slag which is used in the production of cement, admixture of high performance concrete, road engineering lies in its cementitious property, the influence factors of cementitious property are the basicity of steel slag and the content of silicate in steel slag
The main factors influencing the stability of steel slag are the morphological changes of dicalcium silicate (C2S), the content of free calcium oxide and free magnesium oxide in steel slag

In this paper emphasis is placed on developing a better understanding of the effect of Ti and N on the microstructural development and mechanical properties of these new steel types.
The results indicated that steel with a Ti/N ratio lower than the stoichiometric value provide best mechanical properties.
This segregation is significantly important during hot rolling and thermo-mechanical processing (TMP) of slabs by affecting the microstructure and mechanical properties of final products.
Therefore, the studies of thermo-mechanical processing of low Mn steel as well as understanding the behavior of precipitates in those steel are essential factors on hot rolling processes.
The behaviour of centreline precipitates during hot deformation has been examined to clarify their effect on the mechanical properties of final products.

Effect of dopants The mechanical properties of alumina are influenced for the selection of additives [13,18-20] and dopants [15,21-25] utilized in sintering, that affect the distribution of grain size and the phases formed in the grain boundary.
It is known that the utilization of rare earths influences the mechanical properties, including fluency, fracture toughness and strength, among others, although it is unclear that the mechanism of the properties modification [24].
Taking into account that the rate of alumina wear is dependent of grain size [12] and the fracture toughness is affected by impurities, it is possible to establish the relation among mechanical, microstructural and tribological properties, considering on the information of average grain size and dopant concentration in the grain boundary [25].
The changes of the grain size and the presence of dopants in the grain boundary produced measurable changes in the mechanical properties and in the tribological behavior; however, those changes were smaller in magnitude [26].
However, in specific cases, the influence of the grain size of alumina on the mechanical properties interferes less than the formed intergranular phases, as shown by the results using Ti.