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Due to these situations, the properties and qualities of gear materials are highly affected.
So, improving the mechanical and toughness properties of the existing gear material is very vital and compulsory since these properties have a direct impact on gear fatigue failure.
These situations affect the qualities and mechanical properties of the transmission gear materials.[1, 2].
Figure 8: Influence of Ni-content on impact toughness of experimental and predicted values The fracture toughness is an essential material property that is overseen on various factors, the most significant of which is microstructure and nonmetallic inclusion size of materials.
Therefore, ANN modeling can predict accurately the mechanical and toughness properties of alloy steels.

In micro/nano meter scale, the surface effect may have a significant impact on the mechanical properties of the materials and then affects the life, duration, and reliability of the product.
To find out solutions for these problems, it's quite important to find out the mechanical properties of the material under nano-meter scale.
In this study, we utilize spring components to represents the elastic mechanical properties, as shown in Figure 5(a).
Both of these factors result in the high indention hardness.
Spring components to represents the elastic mechanical properties (a) spring components (b) Elastic/Plastic startup switch Fig. 6.

Metal matrix composites (MMCs) have been found to possess tremendous prospective engineering applications that require materials offering a combination of lightweight with considerably enhanced mechanical and physical properties.
Introduction Metal matrix composites (MMCs) derive their excellent mechanical properties from the combination of a hard reinforcement phase such as silicon carbide (SiC) and a ductile matrix material such as aluminum.
Although many factors affect the tool wear of a CBN and PCD inserts, machining parameters such as cutting speed, feed rate depth of cut, and work piece properties have a significant influence on the tool wear for a given machine tool and work piece setup.
The tool wear is less on PCD tool insert because of its superior material properties.
Karthikeyan, Assessment of factors influencing surface roughness on the machining of glass fiber - reinforced polymer composites, Materials & Design, available on line from www.sciencedirect.com

Introduction The silicon carbide (SiC) reinforced aluminum matrix composite has been considered as a promising material in high technology fields owing to its high specific strength and stiffness, excellent high temperature properties and wear resistance.
In metal matrix composites (MMCs), the cohesiveness between the matrix and the reinforcing particles is also an important factor affecting the mechanical properties of the MMCs.
In the present work, a simple microwave-enhanced wet etching method was applied to modify the SiC surface and its effect on the chemical and mechanical properties of Al/Cu-coated SiC was examined.
The compaction, sintering and mechanical properties evaluation using three-point bending test (ASTM B312-96 specification) were conducted following the same procedure described in ref. [5].
The amount of dissolved copper into solution was dependent on the surface properties of the SiC materials.

On the other hand, the residual stresses may serve as a positive factor in the process for shaping blank with predetermined geometrical and mechanical parameters.
There are some experimental parameters affecting the course of the process: the deformation rate, the level of heating, the holding time at high temperature and the cooling time.
All of them can be taken into account in the model by adding the viscosity properties (creep) of elastic-plastic material.
This module allows you to take into account only those material properties that have the greatest impact at this stage of deformation.
Preform adapts to loading only due to manifestations of creep properties.

Recently, zirconia materials are getting much attention for dental implants because of its toothlike color, mechanical properties, good corrosion and biocompatibility.
These materials have attained main stream use because of their excellent biocompatibility, favorable mechanical properties, and well documented beneficial results [3].
Choosing the material for implantation and dental restoration depends on several factors, such as: device functionality, type of interaction with the host organism, and duration of use (short-term biocompatibility, long-term biocompatibility) [13, 14].
The state-of-the-art technological ceramics will also be used that exploit in engineering applications is for their mechanical properties in particular.
Because it does not change its properties in the oral cavity and is bioinert, which not affect tissues, it has been used in dentistry for up to 15 years.

In the transient analysis phase, the same time were not allowed to repeat operation, the initial conditions were defined in small increments of time will affect the transient analysis method for solving efficiency and result analysis.
Examples and Computational Analysis Physical Properties of Materials.
Stern shaft mechanical seal performance related to different ambient temperature.
Due to the station ring material of high modulus of elasticity, station ring deformation was mainly affected by temperature, and the temperature change was the same trend; and the elastic modulus of the material static ring was relatively smaller, the surface deformation in addition to affected by temperature, but also the force
In the process of loading, the parameters change rule by time adequately described the friction of mechanical face seal of thermal-mechanical effects, namely the friction heat will cause thermal deformation, thermal deformation caused by uneven contact and the contact area was reduced, thereby cause contact area to reduce and temperature rise.

Hierarchy of mappings from process route to microstructure to properties to performance.
Uncertainty in assigning local properties of phases is significant.
Materials design typically involves multiple objectives mapping into several property domains; for example, gas turbine engine blades involve thermal, chemical, mechanical and thermomechanical properties.
Relevant examples of noise factors are variation of ambient temperature, morphology changes, etc.
Y X Type I, II, III Robust SolutionUpper Limit Lower Limit Deviation or Objective Function Deviation at Optimal Solution Deviation at Type I, II Robust Solution Deviation at Type I, II, III Robust Solution Design Variable Type I, II Robust Solution Optimal Solution Y X Type I, II, III Robust SolutionUpper Limit Lower Limit Upper Limit Lower Limit Deviation or Objective Function Deviation at Optimal Solution Deviation at Type I, II Robust Solution Deviation at Type I, II, III Robust Solution Design Variable Type I, II Robust Solution Optimal Solution y = f(x,z) x= Control Factors z= Noise Factors y= Responses y = f(x,z) x= Control Factors z= Noise Factors y= Responses y2 = g(y,z) z2= Noise Factors y2= Responses y2 = g(y,z) z2= Noise Factors y2= Responses Design 1 Design 2 Constraint boundary : Feasible region : Infeasible region x space y space y2 space Design 1 Design 2 Constraint boundary : Feasible

There are several factors that affect geopolymerization, including the type and ratios of the starting materials as well as the curing conditions of the initial mixture.
The experimental design involved the variation of three control factors in five levels.
Factors, such as the curing conditions and the composition of the precursor, strongly affect the structure and properties of geopolymers.
Mehrotra, Influence of granulated blast furnace slag on the reaction, structure and properties of fly ash based geopolymer, J.
Nikraz, Properties of fly ash geopolymer concrete designed by Taguchi method, Mater.

In addition, the mechanical and physical properties of MMCs can be tailor made to meet specific design criteria.
Interfacial thermal resistance is one of the most important parameters since it is related to the solidification time and mechanical properties of the casting.
Interfacial thermal resistance depends on a number of factors including the thermo physical properties of the melt and mould and the formation of air gap between the casting and the mould.
This results in better mechanical properties.
Interfacial thermal resistance is one of the most important properties since it controls the solidification time and mechanical properties.