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It focuses on the effect of important process parameters on the microstructure and mechanical properties of the resulting part.
Parts with better optical, thermal, electrochemical, and mechanical properties have been obtained.
Starting from the raw material, the powder grain size affects the density and consequently the mechanical properties of the produced parts [95, 96].
Some studies showed that AM produced Inconel 718 (UNS N07718) parts contained small cracks that may affect mechanical properties in all directions especially in the building direction [100-102].
These factors affect the density of additive parts and consequently all the mechanical properties and material characteristics.

Hence this project aims at obtaining the best surface finish by optimizing various process parameters affecting the machining conditions.
Introduction Wire Electric Discharge Machining (WEDM) is one of the greatest innovations affecting the tooling and machining industry.
No. of two level factors = 1 Deg of freedom of 2 level factor = 1*(2-1) = 1 No. of three level factors = 6 Deg of freedom of 3 level factor = 6*(3-1) = 12 Total Dof of factors and levels = 1+12 = 13 In general if there are 'n' experiments from an orthogonal array, Degree of freedom of orthogonal array = n-1As per the rule, Degree of freedom of orthogonal array >= Degree of freedom of factors & levels Here the degree of freedom of factors and levels is 13.
It also contains one 2-level factor and seven 3-level factors.
[2] Juhr.H, Schulze.H.P, Wollenburg.G, Kunanz.K ‘Improved cemented carbide properties after wire EDM by pulse shaping’, Journal of material processing technology Vol. 149, (2004) pp. 178-183

Natural fibre based composites are gaining more importance now-a-days due to their specific properties.
Composites are preferred over conventional metals in various fields due to their light-weight, high strength-to-weight ratio and stiffness properties.
They are low density materials possessing high specific properties [1].
The factors and levels are given in Table 2.
The interactions of factors are less significant than individual factors.

Meanwhile, this article discussed the acting force types of the particles inside briquette and influencing factors of lignite molding from the point of agglomerating mechanism.
The interaction between the particles within the coal type and size Mechanical meshing force.
According to the chemical mechanical theory that mechanical and optical, electrical, magnetic, thermal, radiation and other forms of energy, also can cause physical changes in the physical and chemical properties of chemical reactions.
This mechanical force induced by the chemical reaction of substances, known as the mechanical chemical.
Visible, solid bridge bond strength is affecting the type block one of the main factors.

For ceramic materials, toughness and strength are two main factors that affect erosion resistance rather than hardness.
Table 1 Chemical composition of Cr15Mo3 in mass percent (%) Material C Mo Cr Si Mn P S Cr15Mo3 2.91 2.76 15.2 0.24 0.92 0.08 0.15 Table 2 Composition of the ceramic materials used in the experiments Material Composition Density (g/cm3) α-Al2O3 95% Al2O3 3.75 ZTA 80%Al2O3 + 20%ZrO2 4.08 Si3N4 84% Si3N4 +16% Y2O3 and Al2O3 3.40 Table 1.3 Mechanical properties of the ceramic materials used in the experiments Material Bending strength (MPa) Fracture toughness KIC (MPam0.5) Hardness HV2 (GPa) α-Al2O3 350 3 14.0 ZTA 600 5 14.5 Si3N4 850 7 16.0 (a) Cr15Mo3 (b) α-Al2O3 (c) ZTA (d) Si3N4 Fig. 1 Microscopic structures of Cr15Mo3, α-Al2O3, ZTA, Si3N4 Experimental equipment and parameters Experimental equipment adopted here is a rotary disk erosion wear tester with flowing suspensions of solid particles.
So the fracture toughness of ceramic materials should be thought as an important factor influencing the erosion resistance.
Compared to the hardness, the toughness and the strength are both main factor that affect the erosion resistance of ceramic materials.
Xi'an: College of Mechanical Engineering, Xi'an Jiaotong University, 2000.

Conduct appearance observing and sealing property test on welded pipe joint.
Therefore, as for welding process, technical parameters (heating temperature, welding pressure and time), flow property of material fused mass, surrounding temperature etc. are all key factors guaranteeing molecule dispersion and coiling, and all work shall be done by focusing on the accuracy and stability of technical parameters.
If any of these parameters varies, the formation of crystalline zone of melted surface will be affected, which will affect the welding quality of joints.
As shown in Fig. 4, under the condition that temperature and pressure are determined according to the technical regulations, shift time (T3) and pressurizing time (T4) are important factors ensuring welding quality of pipe joints.
[3] Preparation and mechanical research of MC nylon and nanometer composite materials [J] China Plastics Application 2005.33 (7): 7-9.

Essentially, each of the various guideway systems possesses different kinematical and dynamic properties, which may thus bring machine tool to demonstrating different dynamic performances.
The contact stiffness of a sliding surface can be the function of the interface pressure and was verified to be an important factor affecting the contact stiffness and the machining performance [8].
The use of the Turcite-B slidways can also increases the damping property of the tooling system.
Kh represents the Hertz constant and is determined from the contact geometries and material properties of the contact bodies [9].
Sliding interface The contact properties of the elastic interface layer such as Turcite-B in the sliding guide system can be modeled by the following exponential relationship [10] (5) where dn is normal deformation (mm), Pn is normal pressure (N/mm2), Cn is coefficient of normal contact flexibility, and m is coefficient of non-linearity of deformations.

Introduction The temperature of the workpiece rises during plastic deformation because of the heat generated by mechanical work.
The heat generation due to plastic deformation affects the initial temperature field.
The factor determines the portion of plastic work converted into heat.
The value of this factor is close to unity.
These physical properties correspond to carbon steel AISI 1015.

While in case of compacted bottles caps plus pull-tab of cans (waste materials aggregate), concrete mechanical properties are a little below the reference mix.
Othman [7] specified that loading of impact type greater than 40m/s, a local reaction happened in structure as a result of the interval time of affecting load so quickly.
In current study, the mechanical properties estimations of sustainable concrete has been done using waste of metal bottles cans and caps of soft drink and juices at situations of quasi-static, as well as objectives to calculate dynamic properties during impact load of liquid flow through employing CEB-FIP Model Code.
Table 2 Mix details No. w/c Cement Sand Gravel Slump M0 0.5 440 Kg/m3 578 Kg/m3 948 Kg/m3 100 mm CEB-FIP Model Code The estimation of the concrete dynamic properties may be accomplished through the (DIF) Dynamic Increase Factor.
The use of waste materials (bottle caps fibers) in the mix will improve the mechanical properties of the mix of concrete.

Elastomeric Properties in Thermosetting Polymer Induced by Nanoclay Addition Emee Grace T.
However, there are still diverse claims regarding the type of morphology and distribution responsible for the improvement of mechanical properties [3-8].
In this study, PCN were prepared using unsaturated polyester – organomodified montmorillonite (UP-MMT) to understand how the compressive properties of a thermoset was affected with nanoclay addition.
These factors could be reasons why larger aggregates start to form at higher filler content.
“Structural and mechanical properties of polymer nanocomposites”, Materials Science and Engineering, Vol. 53, pp. 173-197, 2006