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Programming of the tool path represents topology data and that is combining of such factors as tool motion and so-called CC (cutter contact) points in tool path as well as CL (cutter location) points of cutter position [5].
There are few data about how any active surface and its morphology do affect on process of the material shaping into definite product.
Thus, any surface can obtain different quality which is expressed through measured data as its surface texture, tolerance and properties of the surface layer.
Because of variety of the free-form shapes, there is wide set of factors affecting objectives and ranges of research in this subject.
Journal of the Brazil Society of Mechanical Science. & Engineering. 2007, Vol. 29, No. 3, 313-318 [8] Toh C.K.: A study of the effects of cutter path strategies and orientations in milling.

Based on the above discussion, research on grinding PCD tools at present mostly focused on grinding mechanism and single factor's optimization under the definite condition, lack of researching and optimizing integrated effect of certain factors on grinding process.
Experimental Method This study chose PCD tools with E Six CTB002 brand material whose mechanical and physical property is shown in Table 1.
This experiment chose grinding speed (rotational speed of grinding wheel), grain size of grinding wheel and grinding pressure that affect grinding process at the most, and was carried out in orthogonal experimental method, L9(3 4 ) orthogonal table with 3 factors and 3 levels.
The experimental factors and levels are shown in Table 2.
Therefore, to grinding efficiency, the best grinding efficiency is rotational speed 3500r/min, grain Table 2 Value of experimental factors and levels Factor 1 Factor 2 Factor 3 Factor level Rotational speed [r/min] Grain size [µm] Grinding pressure [Pa] Level 1 1500 09 5.5 Level 2 2500 15 4.0 Level 3 3500 22 2.5 size 22µm (or 9µm), grinding pressure 2.5Pa.

Effects of Graphite Shape on Thermal Fatigue Property of Thin Wall Graphitic Cast Irons Yung-Ning Pan1,a, Chen-Chi Fan1,b and Chih-Hung Chang1,c 1 Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan a panyn@ntu.edu.tw, bfaner@mail.hsivhs.tpc.edu.tw, cr98522712@ntu.edu.tw Keywords: Cast iron, Thermal fatigue, Thin-walled casting Abstract.
Furthermore, adding some 0.5%Mo to the irons significantly improves the thermal fatigue property, in some cases even by a factor of 2, implying that the role of Mo outweighs the influence of graphite structure in promoting thermal fatigue property.
In order to realize how the thermal fatigue property is affected by the graphite structure, 6-mm section plates were cast for evaluation due to the fact that a meaningful representation of compacted graphite structure can be obtained in this section.
Both properties in turn are related with alloy composition and microstructure [5-11].
Adding some 0.5%Mo to the irons significantly improves the thermal fatigue property, in some cases even by a factor of 2, implying that the role of Mo outweighs the influence of graphite structure in promoting thermal fatigue property.

Stress intensity factors are important parameters to compute fatigue crack propagation rate.
Introduction Due to good mechanical properties at room temperature, good weld ability and corrosion resistance, 5XXXaluminum alloy are widely used in housing construction, automobile manufacturing, ship structural, etc.
Stress intensity factor is an important parameter to compute fatigue crack propagation rate, and the change of stress field distribution and the stress intensity factor at crack tip will directly affect the fatigue crack propagation rate.
Meshing does not need to conform to the geometric properties of crack in extended finite element analysis, and a geometric description of crack becomes the key point to simplify the track of a crack.
XFEM was used to calculate stress distribution and stress intensity factors and C3D8R unit with 6006 units and 19200 nodes were adopted.

Through judicious control of reinforcing solid particulate phase, selection of matrix and suitable processing technique, composites can be prepared to tailor the properties needed for any specific application.
The effects of individual control factors are assessed by calculating the response and the results of response analysis lead to the conclusion that factor combination of A1, B2, C4, D3 and E3 gives the minimum wear rate as evident from Fig. 2.
In this work, a statistical method is implemented to correlate the control factors.
Factors like BFS content, impact velocity, erodent temperature, impingement angle in declining sequence are significant to minimize the erosion rate.
The size of the erodent is identified as the least significant control factor affecting the erosion rate of such polymer composites.

The rate of the dendrite growth was affected by the concentration of the medium used.
In conjunction with this, the solder material used has become a dominant factor that will affect the reliability of a product.
Referring to [4], the overall properties which include mechanical properties and reliability of lead-free solders as Sn-Pb solder replacements is undoubtedly very promising.
Yet, the properties of these lead-free solder alloys in corrosive environments have not been widely reported even though it is an important issue in automotive, aerospace, maritime and defense applications.
Tanaka, Factors leading to ionic migration in lead-free solder, ESPEC TECHNOLOGY REPORT No 14. 2002 [10] D.Q.

The Effect of Magnetic Field on Crystallization and Some Properties of Silver Azide Crystals A.P.
Introduction A magnetic field is one of factors relevant to crystallization alongside with concentration of input reagents temperature acidity of the reaction environment, and availability of complexing agents etc.
Furthermore, magnetic treatment changes some physical properties of systems (electrical conductivity, density, surface tension, dielectric permeability, magnetic susceptibility, and viscosity) [2,4].
The properties above relax gradually for some months (at least 6).
The characteristics of samples are modified and tend to have properties uncharacteristic for this class of materials (initiating explosives).

Whereas from the onset of the development and use of such coating, there have been much concern about possible detrimental effects of the coating and coating process on the mechanical properties and fatigue behaviors of coating/substrate system.
The differences in chemical composition between the coating and the substrate material lead to an inevitable mismatch in their physical and mechanical properties [4].
The results indicate that the presence of protective coating does affect the fatigue life of the alloy according to strain range level and temperature.
The DBTT is affected by several factors, including coating composition, coating application process, coating thickness, surface finish and strain rate [2, 3, 6, 7].
Mughrabi, in: Thermo-mechanical fatigue behavior of materials, ASTM STP 1371, edited by H.

There are many factors causing the failure of the engine.
Different microstructures correspond to different high cycle fatigue properties [2,3].
At such a high temperature, the microstructure of single crystal superalloy will change slowly, which will affect the fatigue property of the alloy.
The coherency between the matrix and the precipitates has a significant influence on the properties.
Tang et al, Effects of low angle boundaries on the mechanical properties of single crystal superalloy DD6, in: R.C.

Ti-6Al-4V is unique in that it combines attractive properties with inherent workability and good weldability.
Fig.2 Finite element model Mechanical and thermal physical properties of TC4 at different temperatures can greatly affect the simulation precision, therefore, those properties should be cared about.
Thermal physical properties of TC4 show a rising tendency with higher temperature.
Fig.3 Temperature dependence of mechanical properties of TC4 Fig.4 Temperature dependence of thermal physical properties of TC4 In the solution of finite element matrix, the boundary condition included welding condition, fixture condition, and thermal condition.
The compressive residual stress is the critical influencing factor to cause wave-like deformation.