Search results

This paper discusses the state of knowledge regarding Cr release, the chemical and mechanical factors that most significantly affect Cr release, and the potential toxicity of Cr as it applies to longterm implantable medical devices.
The corrosion of implants can be influenced by numerous factors that may not be completely accounted for in a simple thermodynamic analysis.
Merritt and Brown have noted that the inflammatory response of tissue to an implant, and infection, may lower the pH; hence, increase corrosion, as well as affecting the metal binding to proteins in the serum, synovial fluid, and cells [1].
Body cells can affect alloy corrosion in the body by changing the local chemical environment.
Lin et al. also noted that macrophage cells lower local tissue pH and release RCS, such as NO, H2O2, and O 2 during wound healing and tissue remodeling which may alter alloy surfaces and affect CoCrMo alloy's corrosion properties.

So the crucial factors were taken into account and the unimportant factors were neglected.
The Rheological Model It was verified that the rheological property of the semisolid metal affects by some facters:the shearing rate, shearing time, the ratio of the solid phase, the shape and distibution of the solid.
The effect of the Technique Parameters on the Temperature Field in Casting-rolling There are many factors such as the temperature of casting-rolling, the velocity of casting-rolling, the gap of twin roll, the temperature of roll and the diameter of roll affect the process of casting-rolling.
It was mainly affected the quenched layer of the strip.
Mechanical properties of magnesium alloy, sheets produced by semi-solid roll strip casting[J]．Mater Sci Forum, 2003, 426(4):617 [9] H.

The mechanical properties of the material have been represented in the Table 1.
Table 1 Mechanical properties of Al 7075-T6 Materials Range Unit Modulus of Elasticity 7.2e10 N/m^2 Poisson's ratio 0.33 - Ultimate Tensile Strength 5.7e8 N/m^2 Tensile Yield Strength 5.05e8 N/m^2 Thermal expansion coefficient 2.36e-5 1/K Thermal Conductivity 130 W/(m.K) Fig. 3 Billet model in forging In the actual operating condition, centrifugal force is acting on the connected pin between the holder and the arm according to the rotating of the propeller shaft.
On the other hand the minimum safety factor, 7.8, was much higher than the usual unmaned aircraft safety factor, 3.
It can be affected to the increasing of forming load.
And the minimum safety factor, 7.8, was much higher than the usual unmaned aircraft safety factor, 3.

Cement-based composite materials in the reinforcement and matrix interface effects can affect their stability and mechanical properties.
The addion of the length and dosage of polypropylene fiber and other factors on the fiber-reinforced cement-based composites have a great impact.
Yumei He, Luwen Xu [19] studied the types of plant fiber and plant fiber content of the cement-based composite material properties through the plant fiber cement composites basic mechanical properties of the test data.
Fiber mechanical properties of polymer cement concrete.
Tensile Mechanical Properties of Cellulose Fiber Reinforced High Ductility Cementitious Composites.

The heat is transmitted for matrix, resulting in loss of mechanical properties of the composite.
According to the authors, the increase of temperature affected the mechanical properties of these materials.
Vilar et al. [17], in your research, studied the dynamic-mechanical properties of a composite reinforced with carbon-fiber with NiTi wires.
Physico-Chemical properties The properties of the resin and NiTi wires used in the present work are shown in Table 1.
Santos, Dynamic mechanical properties study of an aeronautical composite CFRP with embedded shape memory alloys wires.

It was emphasized that optimizing interference fit and material properties is essential for enhancing bushing durability and reliability in harsh operating conditions.
The material chosen for the con-rod should have good mechanical properties for getting optimal performance[29]. “42CrMoA has a good combination of strength and toughness in the quenched and tempered conditions” [2].
Fig. 3 Boundary conditions. 2.2.2 Orthogonal simulation test Selection of experimental factors A number of factors affecting the interfaces of the interference fit between the con-rod and bushing significantly influence the fretting characteristics of the bushing, including relative slip amplitude between the interference fit surfaces, contact load, geometry, tangential force, friction coefficient, and so on.
Friction and interference coefficient are two adjustable factors that can be realized throughout the machining and assembly processes.
Robusto, Tribological properties of connecting rod high strength screws improved by surface peening treatments, Metals 10 (2020) 344. https://doi.org/10.3390/met10060344 [5] Q.

It can change the surface properties of the material and play the role of electromechanical, thermodynamic, optical properties and others in preventing corrosion and improving wear resistance.
Table 2 shows the orthogonal experiments in 4 factors and 4 levels for Ni-W-P/ graphene composite coatings.
Table 2 Results of orthogonal experiments in 4 factors and 4 levels for Ni-W-P/graphene composite coatings experimental No.
Kysar, et al, Measurement of the elastic properties and intrinsic strength of monolayer graphene, Science. 321 (2008) 385-388
Li, Microstructure and properties of Ni-W-P/graphene composite coatings by electrodepositing.

For ceramic matrix composites produced by PIP process, the fiber/matrix interface plays an important role in determining composite mechanical properties and fracture behavior and it is a key factor affecting material properties.
And subsequently Cf/SiC CMC specimens of excellent properties were manufactured Experimental Materials preparation.
Results and discuss Effect of heat-treatment temperature on materials structure and properties.
The microstructure and mechanical properties of Cf/SiC samples including three-point flexural strength and fracture toughness were determined and analyzed to investigate the effect of PyC interface on the structure and properties.
Conclusions (1) Mechanical properties of Cf/SiC composites are greatly improved when carbon-fiber preform are processed by high temperature heat-treatment in preparing specimens utilized polycarbosilane/ diviylbenzene solution as precursor.

· Because of the synergetic interaction between mechanical and environmental conditions the effect of loading frequency can greatly affect crack growth rate.
The elastic properties for the base and weld metal are different (Table 2).
The crack growth properties are also different for the two stress ratios of 0 and 0.85 (Table 2).
If a point is within the weld region, then weld properties are applied, otherwise base properties are applied.
Table 2 – Elastic properties, crack growth laws, threshold and failure (units: da/dN m/cycle, K MPa-m1/2.)

Factors influencing the bulk density and compressive strength of the wall materials were discussed in detail.
The raw materials, mechanical properties and microstructure of the wall materials are charaterized.
Factors influencing the bulk density and compressive strength were investigated.
Fig.2 Mechanical properties of samples Fig.3 XRD patterns of wallmaterialssamples a b c d Fig.4 SEM photos of wall materials samples SEM photos of sample 3 were taken.
The key factors in obtaining superior mechanical properties for wall materials are the quantity and the quality of the hydration products.