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Fine microstructure and excellent weld shape can be obtained by choosing reasonable technology parameters and the mechanical properties of welding joint can also be promoted.
The increasing of Al in magnesium alloy is beneficial to thinning the grain and to improve the mechanical properties.
The Mechanical Properties of Welded Joints of Magnesium Alloy Wang et al [17] used CO2 laser welding system to weld AZ31 magnesium alloy and studied the microstructure and property of the welded joints.
This shows that using laser welding technology to weld AZ31 magnesium alloy can improve the mechanical properties of welded joints.
The pores may be reduced by adjusting the parameters, preheat and eliminating the factors of gas, but they can't be entirety avoided[21].

Microscopic observation and tensile test were carried out to estimate the microstructural characteristic and mechanical properties of the bimetallic material.
The mechanical properties of the coatings were closely related to formation of the components.
Wu, Interface microstructure and mechanical properties of laser welding copper–steel dissimilar joint, Optics and Lasers in Engineering. 47 (2009) 807-814
Liu, Microstructure and mechanical properties investigations of copper-steel composite fabricated by explosive welding, Mater.
[8] Qinying Wang, Yuchen Xi, Xiaoyu Liu, Microstructure and mechanical properties of interface between laser cladded Hastelloy coating and steel substrate, Trans.

Thielen et all [7] compared the mechanical properties between non reinforced and reinforced cement spacer of hip arthroplasty.
Table 1: Material properties used for the finite elements models [7].
This method was applied to optimize the mechanical and the geometrical properties of reinforcements for cement spacer.
Williams, Factors affecting the outcome of total shoulder arthroplasty.
Viceconti, Fracture properties of an acrylic bone cement.

Most of the studies are going on to optimize the parameters to attain maximum mechanical properties in ferritic and austenitic dissimilar welding.
As the total factors that we are considering are three i.e, welding current, speed and gas flow rate.
The total number of combination of parameters obtained are (factors)leveli.e, 33.
This TIG welding process produces narrow HAZ and good mechanical properties of the joints which increasing life.
Effects of TIG Welding Parameters on Morphology and Mechanical Properties of Welded Joint of Ni-base Super alloy.

The Φ is a constant factor of 3 and k 3.2.
This can be attributed to the change of microstructure and mechanical properties.
Hvizdo: SiC/Si3N4 nano/micro-composite — processing, RT and HT mechanical properties .
Tsuge: Mechanical properties of unidirectionally oriented SiC-whisker-reinforced Si3N4 fabricated by extrusion and hot-pressing.
Hayashi: Room temperature mechanical properties of SiC-whisker/Si3N4 ceramic composites.

Also, the preheat temperature, thermal conductivity of mold material and thermal convection coefficient known as the influencing factors of thermal stress and decreasing stress measures have been studied.
Also, the influencing factors of thermomechanical stress and decreasing stress measures have been studied.
As the model in the cooling process is impacted by gravity and chemical reactions and other factors, the material properties of the casting are not uniformly distributed.
Owing to the range of temperatures experienced in the process, the model must account for any appreciable temperature dependencies in thermo-physical properties of the materials employed in the casting process.
Influencing Factors of Thermal Stress Basicly study five key points and compare.

Advanced engineering ceramics have been widely used in modern industry due to their excellent physical and chemical properties.
End electrical discharge milling and mechanical grinding compound machining method is employed to machine SiC ceramic in this paper.
Introduction Due to their excellent physical and chemical properties, advanced engineering ceramics are already being used in the aerospace, automotive, tool field, etc.
The hardness and strength of the workpiece are no longer the dominating factors that affect the tool wear and hinder the machining process.
To utilize the advantages of electrical discharge milling and mechanical grinding, the area of mechanical grinding should be the same as the area of electrical discharge milling, so the diameter of the abrasive stick, dm, should be the same as the diameter of the electrode, dd.

Introduction In vivo, the sclera and scleral fibroblasts have been in mechanical environment because of the internal pressure and eye movements, the mechanical stimulation play an important role in sclera remodeling of myopia development and recovery by means of regulating the biochemical and biomechanical properties of the sclera and scleral fibroblasts.
Scleral pathology (e.g. scleral thinning, the loss of scleral tissue, the weakening of the scleral mechanical properties) is a major cause of high myopia development [6].
Therefore, we hypothesize that the mechanical stimulation can affect the sclera remodeling by regulating the scleral fibroblasts after PSR surgery.
Li, “The study of the role of MMP–2, TIMP-2 and growth factors in lens-induced myopia”, Chinese Journal of Optometry & Ophthalmology, vol. 10, pp 17-20, 2008
Zhang, “An experimental study on collagen content and biomechanical properties of sclera after posterior sclera reinforcement”, Clinical Biomechanics, vol. 23, pp 17–20, 2008

Fracture initiation is a key factor of hydraulic fracturing, as lack of research on fracture initiation position.The perforation geostress mechanical model of low permeability reservoir is built according to the rock mechanics, seepage mechanics, elastic-plastic mechanics, considering solid-fluid coupling and rock material nonlinearity.
Facture initiation is a key procedure affecting the fracture success.
Instance validation In order to verify the correctness of the method and theory, simulating and calculating fracture initiation pressure of Daqing well Ao 332-32, and its formation parameters and mechanical properties of rock are shown in Table 1, the fracturing operation curve is shown in Fig. 4.
Table 1 The rock mechanical properties of AO 332-32 well Permeability / Elasticity modulus /MPa Poisson ratio Internal frictional angle /0 Extent of porosity /% cohesion /MPa Initial geostress /MPa 16.6 2.996E+04 0.25 450 16.9 8.23 30 22 19 Fig. 5 Distributing nephogram of maximum principal stress around the perforation area Fig. 4 Fracturing operation curve of AO 322-32 well The actual fracture initiation pressure of wellhead is 35 MPa from operation curve.
The distribution and magnitude of pore pressure directly affect the position and pressure of fracture initiation, therefore, the following will focus on how the distribution of transient pore pressure around the perforation affects fracture initiation.Using the method abvoe, calculation results and fracture initiation pressure is shown in Table2 .

Mechanical properties of (001) Mo and (001) Mo - 1.5 at.% Ir single crystals have been studied by nanoindentation.
Mechanical properties of the (001) Mo and (001) Mo - 1.5 at% Ir single crystals.
So, the addition of Ir to Mo increases the τcrit value by a factor of about two.
Summary Mechanical properties of pure Mo and Mo - 1.5 at% Ir single crystals (nanohardness, elastic modulus, critical shear stress for dislocation nucleation) have been studied by nanoindentation.
The last factor is decisive for the increase of the Mo - Ir single crystal hardness.