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Explains the effect of the silicon content on Fe-Cr alloy damping performance, the results shows that the silicon content affects obviously on damping properties of Fe-12.8Cr two element alloy, Fe-12.8Cr two element alloy can be with better damping properties when the silicon content is about 0.6%.The domain area and domain interface mobile ability affect on the damping performance of Fe-Cr two element alloy, which ensure the appropriate grain size to increase the domain area and improve the magnetic domain wall moving ability can improve the damping properties of Fe-Cr based alloy.
On this basis the author choose silicon as a third group element to research the damping properties of Fe-Cr based damping alloy.
Fig.2 The δ MAX curves of the alloys with mass fraction of Si% Grain boundary relaxation theory shows that friction of ferromagnetic damping alloy depends on two main factors of the domain areas and the domain wall moving ability [3], when the domain wall quantity and its mobile ability are reasionable, friction of alloy reaches the maximum value.
Conclusion (1) The silicon content affects obviously on damping properties of Fe-12.8Cr two element alloy, Fe-12.8Cr two element alloy can be with better damping properties when the silicon content is about 0.6%
(2)The domain area and domain interface mobile ability affect on the damping performance of Fe-12.8Cr alloy, which ensure the appropriate grain size to increase the domain area and improve the magnetic domain wall moving ability can improve the damping properties of Fe-12.8Cr two element alloy.

In order to investigate the influence of MA conditions on the microstructure and thermoelectric properties, MA synthesis were carried out under various conditions with different milling times.
The purpose of the present study was to synthesize nano-grained CoSb3 by MA-SPS method and to investigate the relationship between MA process and thermoelectric properties.
The thermoelectric properties were investigated by the measuring the Seebeck coefficient and electrical resistivity using the ZEM-2 system.
The difference in electric transport properties was possible caused by the volatilization of some Sb element during the SPS process at the high temperature.
The thermoelectric properties of the SPSed samples were greatly affected by the status of MAed powders, especially the phase structure and particle size.

Oxidation stability is one of the most important properties of biodiesel, which primarily affects the stability of biodiesel during storage for long time.
Factors affecting biodiesel oxidation stability Oxidation stability of biodiesel is affected by two kinds of factors including: external factors, such as heat, catalyst, air, light, additives; internal factors, such as the type and content of fatty acid methyl ester, the natural antioxidants.
It showed that sesamol and soluble polyphenols had the same properties with BHA and BHT.
Although over-dosing can reduce oxidation stability and in extravagant doses can deleteriously affect other fuel properties.
Further work is necessary to better understand the factors and mechanisms which affect the oxidation stability of biodiesel/petro-diesel blends.

The Effects of the manufacturing errors of a group of sprags on the Engagement Properties of Sprag Clutch Maohui Qing1, a, Hongzhi Yan1, b and Wuzhong Tan1, c 1School of Mechanical and Electrical Engineering, Central South University, Changsha 410012, China aqingmaohui@sina.com, byhzcsu@csu.edu.cn, ctanwuzhong@163.com Keywords: Manufacturing errors of a group of sprags, Simulation, Engagement properties Abstract.
Established the geometric model of overrunning clutch and the dynamic model using Adams, and then analyzed the engagement properties of the overrunning clutch with actual manufacturing error.
Introduction The flexibility and reliability action of overrunning clutch is one of the key factors affecting the safe operation of the aircraft [1].
H J Peeken’s analysis pointed out that the clutch rapidly wedging action may cause of sprag suddenly ran out[2].FC Williams analysis of the dynamic characteristics of the sprag clutch, established the clutch multiple factors sliding model in the process of wedging [3].C Chassapis established the sprag clutch nonlinear rigidity dynamic analysis model in the process of wedging and wedged state[4].In the domestic, Chen Xiangyuan, Liang Weisen and others studied the sprag overrunning clutch manufacturing process[5].The Northwestern Polytechnical University Professor, Wang Jinhua studied wedge overrunning clutch radial deformation [6].
Mechanical design and manufacturing, 2008(4):130-132.

The physical and mechanical properties of FRP bars and reinforcement of beam are shown in table 1, and table 2.
Physical mechanical properties of FRP rebars FRP rebars class Diameter[mm] ffu[MPa] Elongation[%] Modulus of elasticity[GPa] CFRP rebars 9.5 adhersing sand 1779 1.65 136 GFRP rebars 9.5 adhering sand 993 2.31 72 Table 2.
Base specimens Base specimens adopt series A test model, and have the same size and the same physical and mechanical properties of FRP bars like previous one.
Table 3 shows the physical and mechanical properties of concrete.
Physical mechanical properties of concrete Concrete (C30) fc [Mpa] εc [10-6] ft [Mpa] Ec [Mpa] ν 20.1 1640 2.01 30000 0.2 Table 4.

Results and discussion Mechanical properties.
Among the factors affecting the strength, fiber spinning solution concentration was the most obvious one.
The addition of crosslinker can improve the mechanical properties of fibers and the fibers’ forming.
Crosslinker can increase the density of the fibers crosslinking point, improve the mechanical properties of fibers.
And discussed the effects of different factors on the fibers strength, the strength of the fibers were low.

Assessment of Engineering Properties of Geosynthetics with Seaming Methods Han-Yong Jeon Department of Applied Organic Materials Engineering, Inha University, Incheon, Korea(Rep.)
Introduction Geosynthetics have their seaming methods such as mechanical or chemical seaming techniques due to their own structures, physical, chemical and thermal properties.
Seam properties of geotextiles and geocomposites were examined by ASTM D 4884(; test method for seam strength of sewn geotextiles) and those of geogrids were investigated through ASTM D 4884.
Especially for geogrids, creep deformation tests were done to determine the reduction factor of geogrids to affect the long-term performance by ASTM D 5262 and GRI GG 3(b).
In here, reduction factors of the geospacer seam are smaller than those of the band seam and this means geospacer seam is more effective than the band seam.

Fusion welding on the structural steel changes the microstructure of welded joint and influence the mechanical properties [1-2].
The chemical and mechanical properties of base material and electrodes are presented in Table 1 and 2, respectively.
Mao et al., “Effect of Nickel Contents on the Microstructure and Mechanical Properties for Low-Carbon Bainitic Weld Metals,” J.
Lee, “Factors Affecting the Inclusion Potency for Acicular Ferrite Nucleation in High-Strength Steel Welds,” Metall.
Tian, “Influence of Ti on Weld Microstructure and Mechanical Properties in Large Heat Input Welding of High Strength Low Alloy Steels,” J.

From the analysis of variance (ANOVA), both flow rate and injection temperature give highest contribution factor to the mechanical properties of the kenaf/PP composites.
Tuo et al. approached the optimum parameters on mechanical properties of kenaf fiber-reinforced composites using Taguchi method of experimental design.
From the analysis of variance (ANOVA), both flow rate and injection temperature give highest contribution factor to the mechanical properties of the kenaf/PP composites.
ANOVA was also used to investigate the collected data to obtain which significant factors would affect all responses.
The highest percentage contribution was also shown up by flow rate factors (D) followed by injection temperature factors (A) for both evaluation criteria.

With the development of 1D nanostructure, dimensionality and size of the materials have also been regarded as critical factors that may bring some novel and unexpected properties.
The properties of metallic nanoparticles depend on shape [6].
The unique and improved surface-enhanced Raman scattering properties [8], mechanical properties, magnetic properties, and electronic properties [9] are possible with anisotropic nanomaterials compared to spheres.
As it is already reported in the literature [21], the Nd2+ caution possesses various chemically stable species under various pH value, which maybe the crucial factor affecting the morphology of the precursor Nd(NO3)2.
Moreover, formulation of Nd2O3 in an easy handled and relatively good mechanical properties nanostructures became a reachable mission.