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Zheng1,c 1Department of Mechanical Engineering, Tianjin University of Science & Technology, Tianjin 300222, PR China 2Department of Industrial Engineering Texas Tech University,Lubbock,TX,79415,United States azhfuying@tust.edu.cn, bhong-chao.zhang@ttu.edu, c tjzhenghui@tust.edu.cn Keywords: Elastomeric sealing, Reciprocating sliding, Efficiency-reinforcement design, Seal failure Abstract: The high efficient, high reliability and energy-saving development of modern machinery equipments challenges the higher request for hydraulic sealing technology.
In case of alternating and reciprocating motions, together with the formation of lubricating film, the sealing interface separates a little because of the interaction of all kind of factors, and result in the shaping of leakage gate.
According to new seal design, the seal leakage, the pressure and film thickness distributing, friction and lubrication states of seal interface can be obtained and the “no leakage” roughness asperities criterions of seal can be identified by developing the seal elastohydrodynamics model and thermomechanical non-linear model According to seal ANASYS model, the main affect factors of seal and the deformation of key point can be analyzed and identified for forecasting the seal life, According to seal test, how the seal materials, work situation, oil pressure, temperature, shape and size, roughness asperities affect seal behavior can be investigated and analyzed.
This model can be used to investigate how seal geometry, seal and fluid physical properties, and operating conditions affect seal behavior.
The seal behavior of efficiency- reinforcement seal design can be test by seal experimental measurement, and identify the affect factors to elastomeric reciprocating seal ability and seal service life.

The plastic forming of sheet metals processes experience very complicated deformations affected by process parameters such as material properties ,the die shape ,the blank shape ,the sheet thickness, the BHF, the friction ,and so on.
Fig. 1 The forming limiting diagram It should be pointed out that the thickness reduction of tearing zone is satisfied with follow Eq.4: （4） Where is the factor of maximum thickness reduction . is the initial thickness of blank sheet.
Fig.2 Punch and die geometry (a) (b) Fig.3 The blank shape 08Al was selected as simulation material, original blank sheet thicknessis 2mm,Material properties of 08Al are given in table1.
Table1 Mechanical properties of 08Al and values of the parameters used in the simulation deep- drawing Mechanical properties of 08A Values of the parameters Young’s modulus() 206.8GPa Yield stress() 110.3MPa Poisson’s ratio () 0.3 Strength coefficient(K) 537 MPa Strain-hardening exponent (n) 0.21 Coefficient of normal anisotropy(r) 1.8 Finite element models are shown in Fig.4.
Metals and Materials International, Vol.7,No.2(2001),p.133-142 [4]Tung-Sheng Yang .Int J Adv Maunf Techno.lVol.37(2008),P58-64 [5]L.Gunnarson,E.Schedin.Journal of Material Process Technology, Vol.114,No.1(2001),P168-173 [6]Youxia Bao,Wei Xu,Gang Liu.Chinese Journal of Mechanical Engineering,Vol.37,No.2(2001),P105-109.

The effect of External Voltage on Pulsed Electrohydrodynamic Printing Xin YUAN1, a, Zhengyu BA1,b and Zhenhua XIONG1,c 1State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China a*kevinyuanxin@sjtu.edu.cn, bbazhengyu@sjtu.edu.cn, cmexiong@sjtu.edu.cn Keywords: external voltage; deposition frequency; pulsation mode; EHDP.
Apparently, the deposition frequency of droplets is a key parameter, and it is influenced by various factors.
Results show that volume of the liquid accumulated at the apex of the nozzle changes during the non-electric field period, which affects taylor cone deformation time and deposition frequency.
They also found nozzle and liquid properties can greatly influence the pulsation frequency.
The detail properties of ethylene glycol is tested as follows: conductivity is s/m, relative dielectric constant is 38.66, surface tension is 48 mN/m(), viscosity is 16.9 mPas(), density is 1115 kg/.

Presence of MF before or after deformation does not change the mechanical properties of crystals [3, 4].
When discussing the assumed mechanisms of MF effect on plastic properties of magnesium-containing alloy, it is necessary to take into account one more factor related to presence of iron (up to 0.4%) in the aluminum alloy.
The intermetallic particles of that form per se adversely affect the mechanical properties of aluminum alloys by reducing their plasticity and increasing their porosity.
Therefore, the aim of the further part of our work was experimental investigation of the effect of static MF on mechanical properties of aluminum alloy with CAl no less than 99.9%.
Petrzhik, Magnetoplastic Effect: Basic Properties and Physical Mechanisms, Crystallogr.

Analysis on welding crack of subcritical power station boiler platen superheater header Yanting Feng1,a, Xiangfeng Zheng1,b, Xuexia Xu1,c, Guozhen Dong1,d, Yong Wang1,e, Peng Sun1,f 1 Boiler Inspecting Department, Hebei electric power research institute, Shijiazhuang, 050021, China a13503206410@139.com, bhepri-zxf@he.sgcc.com.cn, c13739765966@139.com, dhepri-dgz@he.sgcc.com, ecn, ehepri-yongw@he.sgcc.com.cn, fhepri-sunp@he.sgcc.com.cn Keywords: Platen Superheater Header, Failure Analysis, 12Cr1MoV,Welding Crack Abstract.Welding crack analysis was carried out on tee joint crack of boiler platen superheater header (12Cr1MoV) of subcritical power station applying finite element analysis,microanalysis, mechanical properties test, chemical composition analysis, metallography examination and SEM observation etc.
Structure analysis showed that there existed a series of improper factors in the tee joint design.
Conclusions and Suggestions According to above discussions, the Causes of the crack are the integration results of several factors led to crack origination at the step of tee joint where is also melting line including improper tee joint strcture, non-special welding process applied when welded and heat treatmented, large welding standard and residue post-weld stress not decreased effectively by heat treatment.
Split-rod should be carried out for those with defects to remove the metal of weld seam and heat-affected zone.

Other properties such as flexibility, good power-weight ratio and resistance to radiation can make CIGS solar cells ideal for use in space, the automotive industry and complex structure building integrated applications.
The manufacturing costs and cell efficiency are critical factors for its wider applicability in terms of an economical point of view.
FS-laser processing generated the edge of protruding objects with almost no heat affected zone.
Note that the results show a flexible Mo/P1 film can be successfully scribed with heat-affected zone by FS-laser pulses.
The P2 layer is usually scribed by using a mechanical machine.

Because the microstructure and properties are more opportunity for creating new alloys and much better than traditional application with a much higher possibility, [1,2,3].
The stabilization of the simple solid solution phase is very significant in terms of the microstructure and properties which can be obtained in these materials, [1].
The material does not have magnetic properties (is nonmagnetic).
[8] Y.Zhang, Mechanical properties and structures of high entropy alloys and bulk metallic glasses composites, Materials Science Forum 654-656, pp.1058-1061, (2010)
[12] Chen Y, Duval T, Hung U, et al., Microstructure and electrochemical properties of high entropy alloys-a comparison with type-304 stainless steel, Corrosion Science 9, pp.2257-2279, (2005)

The tailings dumps have also adversely affected the landscape and the topography of the area.
There are many factors affecting the biomineralization [11] process.
Calcium carbonate precipitation is a rather straightforward chemical process governed mainly by four key factors: (1) the calcium concentration, (2) the concentration of dissolved inorganic carbon (DIC), (3) the pH and (4) the availability of nucleation sites.
The mill tailings were collected from a iron mine dumps in Nanjing, The chemical properties of the mill tailings are shown in Table 1.
Microbial Processes and Mechanisms Affecting Bioremediation of Metal Contamination and Influencing Metal Toxicity and Transport.

This is particularly true for corrosion [2,4] and tribological properties [5,6].
The surface properties after HCPEB must be determined by the final structure-phase states generated by this thermo-mechanical treatment.
A more advanced dissolution process of the carbides [14] together with the ultra fine grain size of the matrix grains [14, 19] are considered to be important factors for the stabilization of the  phase in the top surface layer.
The heavy deformation taking place during the HCPEB treatment after high number of pulses are of different natures depending, among other factors, on the staking fault energy of the treated materials.
This layer can improve drastically the corrosion properties.

When osteosarcoma is located in the iliac wing, the reconstruction is important because it may affect the weight-bearing function.
By far, titanium and its alloy are the most frequent biomaterial used as implant prosthesis due to the excellence in biocompatibility, high corrosion properties, high mechanical properties, and also low modulus elasticity compared to other metallic material such as stainless steel or cobalt-chrome alloy [17-19].
Material properties for cortical bone, titanium, and Ti-6Al-4V are assigned to the 3D model to obtain comparative study on stress and strain distribution between natural bone and the titanium iliac implant.
Properties of The Materials Used in FEM Study Property Cortical bone [21] cp-Ti [22] Ti-6Al-4V [22] Density (kg/m3) 1900 4500 4380 Young’s modulus (GPa) 17 116 114 Poisson’s ratio 0.29 0.34 0.35 Yield strength (MPa) 114 140 882 a b c Figure 1.
Other properties such as elastic modulus, toughness, bending strength or other properties such as high corrosion properties and high biocompatibility are needed to be explored experimentally [30].