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Cutting parameters are the important factors that significantly influence surface roughness of the machined parts.
Seven levels were selected for each of the four factors.
The steel is widely used for pressure die casting, extrusion and hot forging because of its excellent comprehensive mechanical properties such as good red hardness and roughness.
The nominal chemical composition and material properties of AISI H13 steel are given in Table 3 and 4, respectively.
(3) where, η is the value of S/N ratio (unit: dB), yi is the value of surface roughness for the experiment in each factor/level combination (unit: μm), n is the number of combined noise factors.

The basic aim was to investigate the correlation between the wear volume and other mechanical properties (hardness, indentation fracture toughness) of this ceramic composite, and to find a mathematical model, which can predict the wear volume of the investigated materials.
Inhomogeneity analysis and their influence on the mechanical properties of the tested composites are published [2].
Wear is a complex system property, which is dependent on many factors (i.e. contact geometry, surface roughness, microstructure, fracture toughness, speed, load, humidity, temperature, etc.).
As a first step Eq. (1) was used to assess the wear volume because of its simplicity, i.e. requiring only two material properties.
Kuzsella: Some tribological properties of a carbon-derived Si3N4/SiC nanocomposite, Journal of the European Ceramic Society, 24 (2004) pp. 3431-3435 [2] Zs.

Drag, which typically takes the form of pressure head losses within a pipe, is one of the factors that contributes to the decrease in flow rate.
Brandfellner et al. showed that with 100 ppm of PAM can reduce the drag by up to 80% and the performance of the DRA affected by other factor including molecular weight distribution of the additives [5].
On the other hand, biopolymers, such as guar gum and xanthan gum, have been studied widely for their DR properties and mechanical stability under turbulent flow conditions.
Finally, the recorded viscosity reading was analyzed to determine the fluid’s properties.
Thus, it can be concluded that the HL solutions exhibit Newtonian behavior as the introduction of natural polymer did not affect the apparent rheological properties of the liquid [10].

In the low matric suction stage, matric suction mainly contribute to shear strength by affecting the cohesion, yet in the high matric suction stage by increasing both the internal friction angle and cohesion; in the transition matric suction stage, the contribution of cohesion decreases while the contribution of internal friction angle increases.
The unsaturated soil deposits might undergo severe changes in mechanical behavior in response to increases in negative pore-water pressures.
Soil properties The soil used in this experiment was obtained from a certain department site in Xiamen.
There are many factors contributing to hysteresis effect.
Properties of unsaturated soils and slope stability of expansive soils[C].

(i) Mechanical method.
(iii) Mechanical and chemical method.
In this way, the properties of different coating materials are compared to decide which one is desirable.
The thermophysical properties of the material are shown is Table 1.
Because of these factors, its machining mechanism is much different from that of WEDM-LS.

The determination of the actual mechanical properties of materials, for existing structure, it is possible by means of an appropriate sampling and laboratory testing.
On the other hand, a wide-range of these mechanical properties can be observed within the same structure.
Therefore, the Italian codes [10] require the use of the so-called “confidence factors” (FC), which are closely linked to the level of knowledge achieved in the experimental investigations.
The concrete behaviour is significantly affected by the amount of transverse reinforcement through the confinement effect.
For this reasons, it was considered necessary to set some procedural rules about the choice of the constitutive laws of materials, finite element modelling of the structure and definition of the non-linear properties.

Products of the material is ABS, the material has a high impact strength and mechanical strength, dimensional stability, resistance to chemical and electrical properties of good performance, ease of molding and machining, and other characteristics; have a certain moisture absorption, forming in the workpiece surface scarring, bubble, in injection moulding dry processing should be carried out before.
Melt in cavity flow and a number of factors, such as polymer properties and structure, injection plastic parts of temperature, pressure and time, as well as moulds and equipment, therefore faced with complex structures, the quality and accuracy of more sophisticated models, even experienced on-site technical staff, it is difficult to guarantee a one-off production of qualified products[5].
Injection mold gate location setting is directly related to melt in the mold cavity within the flow, thus affecting the polymer molecular orientation and product forming of warp.
Weldline and mechanical p roperties of injection molded polyethylene /polystyrene / copolymer blends.

Several parameters of casting process such as melt superheat, preheating temperature of mold, thermal conductivity of coating and flux powder, which affect the temperature distributions in both cast pipe and mold and the changed positions of melt solidifying at last are investigated.
Schematic diagram of the calculation for the angle factor.
Pittman: Configuration Factors for Exchange Radiant Energy between Axisymmetrical Sections of Cylinders, Cones, and Hemispheres and Their Bases (NASA Tech.
Mills: Recommended Values of Thermophysical Properties for Selected Commercial alloys (ASM Int., U.S. 2002)
Wada: Summary of Thermal Properties for Casting Alloys and Materials (National Technical Information Service, U.S. 1982)

The channels that can be seen in the centre of the plate are usually obtained by mechanical methods, which submit the graphite plate to stress.
The advantage of this method when compared to others is the fact that there is no contact with the surface, thus not affecting it and, even so, allowing measurement precisions up to 25µm.
The properties of the plate are presented on the table 1 [8,9].
A parameter to account for is the reflection factor of this kind of material.
Depth measurements were less affected by this phenomenon, only showing an uncertainty of less than 10%.

Errosion-corrosion Critical Performance of Surface Nanocrystalline 20 Carbon Steel in Condensate Water Xiaolei Zhua, Xiaofeng Lub , Xiang Lingc School of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing ,China azhuxiaolei856028@126.com, bxflu@njut.edu.cn, cxling@njut.edu.cn Keywords: Ultrasonic Shot Peening; Surface Nanocrystallization; Errosion-corrosion; Critical Property Abstract: In this paper, the ultrasonic shot peening (USSP) technology was used to obtained surface nanocrystalline of 20 carbon steel.
Therefore, its fatigue resistance, abrasion resistance and corrosion resistance can be improved by enhancing material surface properties of metal construction, which is of great significance to prolong the life of metal construction.
It is well known when grain size of the materials decrease to nanoscale or sub-micron, material properties tend to become isotropic, which improves the material surface hardness and strength effectively.
Thus, the scholars have widely studied the method of material surface nanometer and properties of nanocrystallization materials.
But there are many factors that affect the corrosion resistance of nanocrystallization material, such as the character of alloying element, grain size, grain construction and so on.