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Experimental results Variation of Material Properties with Aging Time.
Figures 2~3 show that the yield strength and fracture properties also decreased with aging time.
Generally, corrosion resistance and strength can be affected by these precipitations.
Our conclusion could be stated as follows: (1) The yield strength, tensile strength and fracture properties of aged CF-8A stainless steel decreased with aging time up
The decrease in strength and fracture toughness was considered to be the influence of the factors such as chromium precipitation at the austenite-ferrite boundaries, sulfur precipitation and accelerated aging conditions

Because of these factors, the foamed cement composites become less homogenous and its component cohesion making it weaker.
However, Class F fly ash is more widely use in the manufacturing of fly ash concrete in industry, due to one of its properties that able to create concrete with higher ultimate strength compare to Class C fly ash.
After polystyrene beads had been decomposed, it left quite a lot of hollow cells all around the structure that looks similar to the honeycomb structure, these hollow cells shaped structure provide the cement composite with minimal density and relative high out-of-plane compression properties and out- of-plane shear properties [5, 6].
Mechanical properties of cement foams in shear.
The effect of foam polystyrene granules on cement composite properties.

After the identification of essential mechanical properties of the developed coatings, the main goal of the presented work is to identify the conditions responsible for the occurrence of wear and thermal damage in application-related tests.
By doping with vanadium, tungsten or titanium, the coating properties can be further improved, especially hardness and tribological properties at higher temperatures.
These two coating systems vary in layer composition and layer properties.
The coating properties are illustrated in Figure 2.
Mayrhofer: Composition, microstructure and mechanical properties of boron containing multilayer coatings for hot forming tools, Surface & Coatings Technology, vol. 205, pp. 24-28, 2011 [18] W.

Molten Ti is lively, and it is easy to react with the mold material during in the investment casting, and hence to form casting defects such as α contaminated layer in the metal near the surface and gas porosity, resulting in the deterioration of the surface quality and castings mechanical properties.
Introduction Ti3Al-based alloys are high-temperature structural materials, and be found a potential applications in aeronautical, aerospace, marine, and automotive industries, owing to their low density, high specific strength, excellent corrosion and creep resistance, and appropriate high-temperature properties[1-4].
So they can take place chemical reaction with almost all of the mold materials to form a brittle reaction layer, and then the casting surface was contaminated, the surface quality and mechanical properties of the casting decreased [10-12].
Because the titanium has high chemical activity, Ti element can react with the mold material, even the mold material is the ZrO2 (Y2O3 stabilized), which is consistent with the properties of Ti.
Beijing: Defend Industry Press, (2001),103 [10] Dippel J D, Klingensmith L G: Factors Which Affect the Quality of Titanium Casting. 17th Nationals SAMPE Technical Conference[C], New York: SAMPE, (1985）,151 [11] Krone K Herstellung, Eigenschaften und Verwenden von Titangus Z：Metall[J], 67(1976), 30 [12] Colley R H.

Finite-element Analysis The use of composite materials is ever increasing due to the various advantages they possess in terms of mechanical and chemical properties, tailoring to specific needs, weight savings, aesthetics, etc.
The properties of composite material and metal are listed as table 1.
Because the composite material property is direction dependent this will affect the dynamic performance.
It is found the rotational load is the major factor.
Anisotropic inhomogeneous deformation of composite materials will affect the dynamics properties of the high-speed rotating flywheel rotor.

Further the migration of different elements and formation of compounds on the machined surface was investigated using EDX and XRD analysis. 1.0 INTRODUCTION Ti and its alloys have wide industrial applications in the area of aerospace, automotive, medicine for medical prostheses due to their excellent corrosion resistance, light weight and mechanical properties.
Due to its stated properties as well as requirements of precise machining, the traditional machining processes results in high machining cost and degradation of machining performance.
However, due to this high temperature, the mechanical and metallurgical properties of machined parts may be affected adversely.
Peak current was identified as the most significant factor followed by pulse-on-time affected the micro-hardness.
Journal of Mechanical Science and Technology 2014, 28 (7), 2831-2844

To investigate these factors influencing the wrinkling initiation experimentally, a modified and the requirements customized test form based on a simple test geometry, the so called Yoshida buckling test, is created.
Furthermore functional properties as insufficient mechanical strength or lack of corrosion properties due to material overlap are negative effects of winkles.
However, to be able to apply this testing procedure to technical relevant curvature and sheet thickness ranges, an adjustment of process and sample geometry to the specific properties of the test setup is necessary.
Here, in particular, the friction and the radius of the punch are the major impact factors.
Journal of Mechanical Sciences, 42 (2000) 1683-1714 [11] R.

Mechanical properties of this alloy are as follows: Rm = 225 MPa, A = 3.5%, Re = 130 MPa and surface hardness at the level of 80 HV.
By intensive mechanical and thermal treatment this values could be extended to: Rm = 375 MPa, A = 13.5%, Re = 160 MPa.
In our research we have been concentrating on the surface machining uniformity which is essential due to: · Precision tools: wear resistance, fatigue resistance [5]; · Friction couples: uniform wettability, lubricating features, maintenance-free work; · HDD (Hard Disk Drives) plates, semiconductor wafers: coatings with physical properties uniformity [4]; · Optical equipment: wavefront undisturbed detection, undistorted picture recording, uniform light reflection [7]; · MEMS sensors’ membranes and plates: surfaces with physical properties uniformity [3, 6]; · Decorative surfaces: light reflection.
Symbol Description Unit Equation Rv deepest valley measured from the zero level nm Rp highest peak measured from the zero level nm Rt total height span of roughness profile nm Ra mean modulus of height nm Rq mean rooted square of height (RMS value) nm Rskew skewness factor of the profile height histogram - Rkurt kurtosis factor of the profile height histogram - where: hi - normalized height of the roughness sample, [nm].
The main advantage of the proposed methods lies in its applicability to the data from the very different surface machining techniques, leading to the surface roughness statistical parameters differing in orders of magnitude, without affecting its main goal – estimation of the surface machining uniformity.

One of the crucial factors, affecting the durability of reinforced concrete transport constructions is the aggressive medium, irreversibly degrading the concrete properties and causing the corrosive changes of the reinforcement elements and their bond failure.
There is a common understanding that not only effective measures for repair and renewal of damaged constructions are needed, but first of all the methods for estimations of the durability of reinforced concrete constructions, subject simultaneously to a mechanical loading and aggressiveness of environment.
Inelastic behavior of concrete with degradation of elastic properties is described with scalar parameter of damage and tensor of plastic deformations.
The difference of the presented model from the elastic-damage and elastoplastic models consists in the possibility of simultaneously taking into account the accumulation of residual strains and degradation of elastic properties.
The simulation of the reinforced concrete plate destruction under corrosive attack on the reinforcement We consider the periodicity cell (Fig.4) of the problem about a strip, weakened by a system of periodic circular holes under uniform pressure p, which is a mechanical mimic of the corrosive attack.

In the design of strain gauges, the material, structure and the location of the strain gauges are important factors in determining the accuracy of the sensor.
In this paper, the elastomer material is selected as 30CrMnSiA, which has good mechanical properties, elastic modulus, elasticity effect (elastic hysteresis, creep and stress relaxation), the effect has little effect on the forming sensor.
In this software, the static structure analysis of multi - component elastomers includes the following steps: the definition of material properties, the establishment of geometric model, the division of grid, the application of load and constraint, the solution and the result. 4.1 ANSYS Workbench model establishment First, delimit the material properties, the choice of the elastic body is carbon steel 30CrMnSiA, the main linear elastic parameters defined: elastic modulus E is 212 × 109Pa, Poisson's ratio μ is 0.3, density ρ is 7800Kg / m3.
The main factors affecting the patch depend on the beam of the height h and the thickness d.
First taking a certain type of sensor as an example, the parameter control equation which affects the strain output is established by using the static stator beam model in material mechanics.