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Optimal properties are achieved by tempering in the temperature range of 750 °C to 760 °C.
This is associated with a decrease in plastic properties – an increase in the tensile strength and a decrease in notch toughness.
The phenomenon of secondary hardening can occur at the beginning of long-term operation, even if the creep properties are satisfactory.
(in Czech) [4] Sztefek, R., Vodárek, V., Schwarz, D., Jarolímová, M.: Microstructural paremeters and mechanical properties of the thermally simulated HAZ samples of T 24 steel, METAL 2015, Brno, Czech Republic, Juny 3rd – 5th, pp. 907 – 909
[6] Mráz, L´. et al.: Bevels with the utility properties of steel T24, Zváranie, No. 5-6, 2012, p. 105-113.

Functional properties of nanostructured materials are different from that of conventional materials, the relevant technology to decide the rapid development and wide application space.
To illustrate the performance index filling nanometer CaCo3 monofilament in tensile strength, elongation and dry heat shrinkage rate and mechanical properties is far more than the mainstream products in the domestic similar.
This can store energy for textiles, while retaining the mechanical properties of fabric.
Effects of nano materials on cell are in many aspects, including the induction of cell apoptosis, cell cycle, induce the release of inflammatory factors, induce oxidative stress, reduced cell adhesion col etc..
ROS is the result of nanoparticles cause inflammation and toxicity, main factors.

In general, the uniform distribution of reinforcement particles inside the matrix,good wettability between the particle and matrix, and suitable bonding strength of the reinforcement /matrix interface are thought to be the major factors controlling the properties of this kind of materials[2-4].To overcome these problems, in-situ technique has been used to fabricate the Al-MMCs,the reinforcements synthesized by in situ chemical reactions during sintering are finer in size,thermodynamically stable and distributed uniformly[5].
Fig.2 Microstructure of green samples and Al-Si-Al2O3 composites Mechanical properties.
It can be found that the structural homogenity of samples A2 and B2 are better than A1 and B1.So A2 and B2 are chosen to test their mechanical properties.Table 3 gives the values of the density, Vicker hardness, tensile strength(σb) and elongation(δ) for samples A2 and B2.
Further studies of other properties to Al-Si-Al2O3 composites are in progress.
Table 3 Density and mechanical properties of the composites Sample No.

Most of the processing problem is due to much heat [2], the characteristics of the low thermal conductivity causes much cutting heat in the processing, affecting the deformation and friction between the tool - chip.
Although the two kinds of theories for different material properties, but these two kinds of theory have no clear boundary, and these two theories are complementary to each other.
Simulation study serrated chip on high speed milling of GH706 There are closely related to the formation of serrated chip and the nature of the material, and the cutting speed is the main factor affecting of cutting temperature.
Fig.3 Structure of cutting edge Fig.4 Model of the cutting system The cutting speed is the most important factor affecting the cutting temperature, so the simulation experiment uses the single factor test method.
Milling workpiece material is nickel-based superalloy, Trademarks GH706, hardness HRC 51.5, length 171mm, width 44mm, height 49mm.Its material properties is shown in table 3.

Slope instability of open pit mine will affect on personal and mining work, thus affecting mining economy.
The southern slope stability of Jilinguole 2 open-pit coal is influenced by various factors such as slope gradient (slope Angle, slope height, slope shape ,etc) and the physical and configuration of mechanical properties about rock ,soil and groundwater which are located in the slope .The stability of open-pit coal mine slope depends on the importance of problem that open-pit coal mine slope design and construction scheme.
Fig. 1 Simplified rendering of the mine stope Fig.2 Entity model that after improved grid Fig.3 FLAC3D model Three-dimension analysis of irregular slope deformation in jilinguole 2mine This physical and mechanical parameters selection of this open-pit coal mine rock is shown in table 1 Tab 1 Physical and mechanical parameters of rock Stratigraphic Characteristics Bulk modulus K[Mpa] Shear modulus G[Mpa] Density ρ[g/cm] internal friction angle φ[°] Cohesion C[Kpa] Sand 5.53 0.96 1.93 15.5 0 Clay 7.6 1.7 1.93 15.5 26.3 Gravel 8.4 2.8 1.95 26.5 280 Coalseam 4.86 8.65 1.32 39.64 2270 Mudstone 1.42 0.69 1.32 8.79 27.65 Regularity analysis of displacement field Research on the overall displacement distribution of Jilinguole 2 mine three-dimensional model .Look at the displacement cloud picture of the model including the overall and vertical direction is shown in figure 4 and figure 5.By these two parts of the cloud picture analyze the mechanics characteristics of three-dimensional
Edge (slip) slop discussion of safety factor in engineering design [J].

It was shown that presence of AgI strongly affects crystallization properties.
It is known that presence of precipitates strongly affects electrical properties of described materials.
From described here results it is obvious that their mechanical properties are also effected.
Here additional factor affecting pressure induced volume change must be taken into account.
It was shown also that presence of precipitates not only affects electrical properties of investigated materials but also their mechanical properties.

The nanocomposite of nano-hydroxyapatite/bacterial cellulose (nHA/BC) obtained by depositing in simulated body fluid (SBF), incorporating their excellent mechanical and biological properties, is expected to have potential applications in bone tissue engineering.
The implanted materials are available for bone regeneration which is the initiation and regulation of the remodeling process induced by a continuous interplay between growth factors and cytokines [1].
Osteoblast (OB) cells, appropriate three-dimensional scaffolds and growth factors are three important elements of tissue engineered bone.
The scaffolds act as the matrix within tissues and provide a support for nutrients, cytokines, growth factors and cells [3-5].
The nanocomposite of nHA/BC obtained by depositing in simulated body fluid, incorporating their excellent mechanical and biological properties, is expected to have potential applications in bone tissue engineering.

The effect on copolymerization and emulsion properties were investigated, and the polymerization condition was optimized.
We had a test on the practical heat-insulating properties on a prototype device.
Solar heat affects daytime surface temperature and hence impacts building heating and cooling costs.
How hot a house gets depends on many factors and a major one is the surface solar reflectance.
The hollow ceramic micro-spheres should be immersed by dispersant for 30 minbefore adding, then all these ingredients were dispersed in lower rate (around 500 r/min) by a mechanical agitation.

The mechanical and chemical properties of mild steel are shown in tables 1 and 2 Table 1: Mechanical properties of Mild steel Table 2: Chemical composition of Mild Steel In this study the experimental plan has feed rate, spindle speed and depth of cut as the controllable variables and the response variables are Energy Consumption (EC) and Material Removal Rate (MRR).After preliminary experiments were conducted by using one variable at a time approach, the feasible ranges for the machining parameters were selected.
In Table 10 above, the combination of A3, B3, and C3 shows the largest value of the GRG for the factors A, B, and C respectively.
The values of each of the factor level in twenty seven experimental runs are set to be the comparability sequences for three controllable factors as shown in Table 12.
Therefore, the order of importance for the controllable factors to EC, in sequence is feed rate, spindle speed and depth of cut.
Then the order of importance for the controllable factors to MRR, in sequence is depth of cut, feed rate and spindle speed.

RFA, however, has negative influence on mechanical properties and durability of RAC because of a large number of mortars attached to its surface, therefore had been restricted in structural concrete for a long time.
The properties of RFA from three different types of recycled aggregate sources with twice regeneration were tested and evaluated according to different standards.
Thus, it was speculated that the key factor which influenced the properties of recycled aggregate was the adsorption mortar.
It could be seen that adsorption mortar is one of the key factors which affect the performances of recycled aggregate.
Although the RFA performances are generally inferior to those of natural aggregate, aggregate properties can meet the mainstream specifications of domestic and international after the recycling treatment.