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There is a general agreement that the most important factor affecting longevity of orthopedic implants is the formation of wear debris, which has been linked to problems such as tissue inflammation, bone loss, toxicity and implant loosening [4-6].
The Co–Cr–Mo alloy is one of the most used metal implant alloys for artificial joints and provides a good combination of mechanical properties, corrosion resistance and biocompatibility [4, 7].
While other researchers have analyzed the mechanical properties and tribological properties of a Co-Cr-Mo alloy after undergone nitriding process and they found a correlation between carbide concentrations and wear resistance increased with increasing treatment time and temperatures [8].
Effects of Plasma Nitriding on Mechanical and Tribological Properties.
Tribo-Corrosion Properties of Cobalt-Based Medical Implant Alloys in Simulated Biological Environments.

Among the causes there are anthropogenic factors such as increasing the supply of nutrients and pollutants into the sea, over-fishing on the coast, recreational diving [3], as well as natural factors such as coral bleaching by heating water [4, 5].
There is a need to propose projects that integrate most of the variables that may be affecting the ecosystem.
This really affects the coral reef ecosystems.
Some samples were also extracted to test compressive strength according to NTC 220 [20] as a measurement of mechanical performance of concrete with which the plates were developed.
Mechanical properties of recycled aggregate concrete under uniaxial loading.

Effects of the Particle Size Variety of Metal Oxide on the Absorption Property of Long-wavelength Infrared Laser Weifu Wang1,3,a, Yugui Zheng2,b, Jianhua Yao1,3, Miao Zhang1,3 1 Key Laboratory of E&M (Zhejiang University of Technology), Ministry of Education & Zhejiang Province, China, 310014 2 State key laboratory for corrosion and protection, Institute of Metal Research, China, 110016 3College of Mechanical engineering, Zhejiang University of Technology, China, 310014 a wwfphd@yahoo.com.cn, bygzheng@imr.ac.cn Keywords: Metal oxide, Absorption capacity, Particle size, Long-wavelength infrared laser Abstract.
In order to study the influences of aggregate size on CO2 laser absorption property, several special absorbing coatings were prepared from four kinds of different particle sizes (45 μm, 13 μm, 6.5 μm and 1.6 μm) TiO2 powder.
Through the comparison of surface morphologies and the quantitative area analysis of heat affected zone, the effects of particle size variety on absorbing capacity are investigated.
Form the figures obtained by OM observation, the laser heat affected zone (LHAZ) could be identified and the areas of the LHAZ on cross-section were calculated by a software “Image J”.
Coefficient K is the affect of other factors on S0 and S1.

Introduction Concrete filled steel tube (CFT) structure has the merits of superior mechanical property in addition to economy which make it popularly be used in building construction industry nowadays [1,2].
Concrete Visual Model Concept and Properties of Concrete Visual Model.
This solution has properties of high viscosity and high transparency.
The advantage of water absorptivity high polymer resin is the stable properties along with time due to insensitively affected by ambient temperature and humidity.
According to the experimental result, the flow ability and viscosity of the water absorptivity high polymer resin solution is primarily affected by two factors, mixing time and dosage of water absorptivity high polymer resin add in 1 liter water.

Therefore, the investigation of bond properties plays an important role in the design of structures reinforced with GFRP bars.
Bond behavior between FRP bars and concrete is a complex mechanism affected by numerous factors: the type of reinforcement (material and surface treatment), the geometry of the rebar (shape and diameter), the location of the rebar in the reinforced concrete (RC) member, the length of the anchorage, the thickness of the concrete cover, the compressive strength of the concrete, type of loading, etc. [1].
The standard methods for experimental determination of bond properties are the pull-out test and the beam-bond test.
Bond properties are defined as Reinforcement bond with use of the bond model by Bigaj (1999) [7].
Kaklauskas, “Mechanical Properties of the Bond Between GFRP Reinforcing Bars and Concrete,” Mech.

Introduction Aluminium is becoming a key material in several industrial applications, i.e. automotive and aeronautical industry, heat exchangers and ship building [1-3], due to its excellent physical and mechanical properties as well as its outstanding corrosion resistance [4-7].
As engineering applications concern, wear resistance, ductile property, residual stress are also essentials [17, 18].
deposition time, current density and the liquid agitation on the coating properties  of aluminium have been experimentally investigated in [19].
The agitation affects the quality of the coating of the external surface.
Frankel, Pitting Corrosion of Metals- A Review of the Critical Factors J.

It is not only the number of components in a system that affect the properties of the composite, processing method also does.
The mechanical properties improvement especially fractural toughness is one of the major areas of concern in ceramic research [3, 27].
Kuo, Mechanical properties of Al2O3/ZrO2 composites.
[13] Orange, G., et al., High temperature mechanical properties of reaction-sintered mullite/zirconia and mullite/alumina/zirconia composites.
Ai, Effect of initial particulate and sintering temperature on mechanical properties and microstructure of WC-ZrO2-VC ceramic composites.

For metallic hollow sphere structures (MHSS), only fewer published works are found in the open literature and are mostly related to the elastic properties and initial yield behaviour [15-20].
At this point properties of the model like size of the simulation model, material behaviour and material properties, symmetrical and periodical boundary conditions, dynamic factors and additional mesh properties are defined.
Figure 6 shows how the Young's modulus was varied and how it affects the first steps of the simulations.
The results are the same for both material cards, so the different properties, as mentioned above, don't matter for the simulations.
Ashby: Cellular Solids: Structure and Properties (Cambridge University Press, UK 1999)

Fracture toughness testing of irradiated materials requires the use of miniaturised specimens and evaluation of TIG welding (tungsten inert gas arc welding) weldment properties is an important issue because necessary for production of nuclear fusion reactors.
Kohno [4]) studied about the mechanical characteristic of JLF-1 steel.
The mechanical properties of the JLF-1 base metal and weld joint are shown in Table 2.
From the tensile properties, the specimen of T-direction represented a lower strength and elongation at the room temperature (RT) and 400°C.
In other words, if specimen have equal shape factor (BN / le), crack-tip constraint becomes equal.

This affects both, the technological and the organizational level. 1.2 Process Chain in tool production.
With both technologies surface properties can be adjusted in a defined manner.
The use of an electro-mechanical drive allows working frequencies up to 500 Hz.
In addition to the initially milled surface structure, especially the rolling force and line spacing were identified to be the crucial factors in terms of the achievable surface quality.
The mechanical properties are shown in Table 1 Table 1: Mechanical properties of materials 2.3 Measurement of Surface Roughness.