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This leads to their premature failure associated with the formation of local washout in the wall, and necessitates the development of a test method for steel oil field pipes for corrosion-abrasive wear, taking into account both factors of abrasive wear and corrosion process factors.
Accordingly, when modeling the process of wear of pipes leading to their failure, it is necessary to take into account the main factors that affect both the nature of corrosion and the intensity of the abrasive effect of this mixture on the material of these pipes, i.e. on the conditions of their operation in the oil fields [5-12].
These factors determine the intensity of corrosion processes in the pipe material and allow to simulate operating conditions during testing.
Effect of high-temperature heating on the structure and properties of aluminum alloys in the production of drill pipes.
Influence of dynamic austenite decomposition on the microstructure and mechanical properties of pipe steel.

The mechanical properties of the roots were determined and tested on individual roots in the laboratory and measured for every two months.
Tr=FmaxπD24 (Eq.1) Tensile strength of roots depends on its physical and the mechanical properties.
Plant root alone cannot improve the soil strength but certainly will promote some level of stability in which is dependent on many other factors.
Factor of safety (FOS) of unrooted and rooted slope Factor of Safety Slope Unrooted Rooted A 4.97 1.50 B 6.33 1.87 C 3.69 - Conclusion The relationship of physical and engineering properties of Eugenia Oleina shows that as the diameter increase, the tensile strength decrease.
“Root biomechanical properties during establishment of woody perennials.” 

Because of multiple constructions, the ground roughness, adhesion, permeability resistance, wear resistance are greatly affected [2].
When the dosage is not enough, the flow properties of concrete can not reach the specifications [3].
Thereby the density and uniformity will be affected, and ultimately the mechanical properties and durability damage.
And the mortar surface quality is affected seriously by the laitance and floating dust.
When water consumption changed while other factors remained, the maximum of the mortar strength appeared.

For clinical application of bone tissue engineering, biodegradability and biocompatibility are critical factors because ideal bone substitutives should be gradually and completely replaced with newly formed bone tissue.
For the production of CMP-polyethylene composites, small changes in particle size and morphology were shown to have significant effects on the mechanical properties of the composite [6, 7].
The mechanical properties of CMP will be very dependent on the particle property and microstructure of the final sintered product [7].
Summary The effect of heat-treatment condition on the properties of CMP powders in the powder synthesis was investigated.
The effect of heat-treatment temperature on the average particle diameter of the CMP powder will be reflected in the mechanical properties of ceramics body.

Several relations for calculating these two factors are shown in Table1.
Table 1: Bearing capacity factors Investigators Mayerhof [2] Hansen [3] Vesic [4] Simulation of Bearing Capacity of Foundation on Granular Soils Material Properties.
The test material properties are given in Table 2.
Table 2: Properties of sand sample Property Values Cohesion () 0 kPa Internal angle of friction () 33.1o Maximum dry unit weight () 16.6 kN/m3 Optimum moisture content () 7.0% Simulations.
The value of bearing capacity factors are obtained from Table 1.

Figures 1 and 2 are applications of alloy modeling tools that have the ability to predict potential phase stability issues and directly correlate to certain mechanical properties.
Fabricating large components such as rotors from large ingots requires developing predictable metallurgical microstructures that can meet the statistical design allowances for mechanical properties.
Slow cooling of superalloys from above the solvus temperature can sometimes result in coarse lamellar precipitations that would have a deleterious effect on mechanical properties.
Alloy and heat treating procedures need to be balanced to insure that mechanical properties can be achieved in thick sections.
MacKay, Design of a Creep Resistant Nickel Base Superalloy for Power Plant Applications Part 1 – Mechanical Properties Modelling, Materials Science and Technology, Vol 19, Mar. 2003, pp. 283-290

Introduction Titanium is a well-known biomaterial, successfully used in the biomedical field, for the fabrication of implants due to its low density, stability in biofluids, good mechanical properties and biocompatibility [1-2].
The native oxide layers on Ti are spontaneously rebuilt in biofluids whenever they are damaged due to an aggressive pH or mechanical factors [3, 4].
Having stability and biocompatibility, and taking into account all the coating and surface activation methods, titanium is one of the most attractive implant material [3,4], but building a nano-tube structure could lead either to an improvement of a quite large range of properties as changing of hydrophilic - hydrophobic balance, increasing biocompatibility, changing nano-porosity, stability, etc.
Such properties are important not only in tissue engineering, but also in other domains, as self - cleaning, solar energy conversion, controllable wettability, electrochromic devices etc. [11-12].
Surface roughness No Electrolyte composition Ra (nm) Rq(nm) 1 HF 0.5% 3 5.4 2 HF 1% 2.4 3.3 3 0.5% HF + 5 g/l Na2HPO4 1.1 1.5 4 1 M (NH4)2SO4 + 0.5% NH4F 3.6 4.6 The results indicate that the composition of anodized solution affects the morphology of the surface of titanium.

Three mechanisms such as the temperature gradient, the buckling mechanism, and the upsetting mechanism have been identified to explain the thermo-mechanical behaviour in laser forming, depending on part geometry, laser process conditions and the complex interaction of many thermal and mechanical factors [4-6].
With the continued heating the bending moment of the plate opposes the counter bending and the mechanical properties of the material are reduced (deteriorate or are impaired).
In laser forming process, steep temperature gradients and thermal cycles lead to severe microstructural changes in the heat affected regions within very short time.
They also create the conditions for the dynamic recrystallization which in combination with phase transformation are the key factors leading for grains refinement.
It is well known that the grain size, morphology, distribution, shape and volume fraction of the martensite phase together with achieved residual stress critically control the mechanical properties, especially fracture, fatigue behaviour and corrosion resistance of steels [14].

Zn and Mg elements, as the main compositions, significantly affect the microstructure and properties of Al-Zn-Mg-Cu alloy [3, 4].
Therefore, the homogenization has played a key role in ameliorating mechanical properties.
The homogenization temperature is also a major factor affecting the dissolution of AlZnMgCu phase.
Cao, Investigation on microstructure and mechanical properties of Al-Zn-Mg-Cu alloys with various Zn/Mg ratios, J.
Li, Effect of homogenization treatment on microstructure and mechanical properties of DC cast 7X50 aluminum alloy, Nonferrous Met.

The reason is that these materials display superior chemical inertness, optical, electrical, and magnetic properties, corrosion and oxidation resistance, such mechanical properties as high wear resistance and hardness and high strength and stiffness at elevated temperatures.
Machinable Glass Ceramic (MGC),as a type of glass ceramics and Aluminum Nitride Ceramic (AlN) representing the category of structural ceramics are of special interest due to their wide range of applications and properties.
The tool wear in the machining of advanced ceramics is mainly affected by tool materials and cooling conditions [11].
It was found [34] that a lot of pits occurred in the lower surface zone affecting the surface quality.
Yang, Q.Xuanhui, Structure and properties of AlN ceramics prepared with spark plasma sintering, Mater.