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The results showed that the Cf/Al-Cu composites had better mechanical and tribological properties compared to Al-Cu alloy.
However, most investigations of Cf/Al composites focused on the interfacial improvement and mechanical properties [4].
Mechanical Properties Table 1 is the density, hardness and ultimate tensile strength of the specimens.
Conclusions (1) The incorporation of carbon fibers in Al-Cu alloy improved the mechanical and tribological properties greatly
Effects of some factors on the tribological properties of the short carbon fiber reinforced copper composite, Materials & Design, Vol.25, 2004, 489-493.

Weld parameter is an important factor affecting micrographic structure and mechanical properties of weld joints.
Weld thermal cycle affects micrographic structure and mechanical properties of weld joints.
Weld heat input is an important factor affecting weld thermal cycle 1.
The chemical composition and mechanical properties of welding materials are also shown in Table 1 and Table 2.
Mechanical properties of experimental materials.

Abstract: The complicated geological condition of the deep roadway is the important factors to influence the stability of the surrounding rock and the safety of mining.
Research [1-2] shows that chemical damage of chemical solutions will weaken the link between mineral particles and make the physical and mechanical properties of the particles change, chemical solution but also corrosion the composition of the rock, so it will make the rock character weak.
The coefficient of difficulty and risk index would be used as the index to evaluate the engineering rock stability of deep engineering, and this can reflect the mechanical characteristics and engineering properties of deep rock engineering.
The instrument can be widely used for engineering measure. basic mechanical properties test of all kinds of materials (including brittle materials, such as concrete, rock and metal material) can be conducted by this instrument.
(a) immersing or not (b) different reagent (c) different PH value (d) different time Fig.2 Curves of Load - deformation The experimental results show that, the underground environment has great influence on mechanical properties of high strength rock.

The Chemical composition and mechanical properties are listed in Tables 1 and 2.
The factors are assigned and the experiments are carried out.
The horizontal axis corresponds to control factors.
[11] Essam Moustafa, Effect of Multi-pass Friction Stir Processing on Mechanical Properties for AA2024/Al2O3, Materials, 2017
Ceretti, Process Parameters Effect on Mechanical Properties and Fatigue Behavior of Friction Stir Weld AA6060 Joints, Vol. 134, 2012

Mechanical Properties of Micro-Porous Metals Produced by Space-Holding Sintering T.
The mechanical properties were studied using compressive tests.
The mechanical properties of porous metals have been extensively investigated [7-13].
However, there are other factors such as pore size, geometry, etc that affect the mechanical properties.
The characteristics of the porous nickel specimens were studied by scanning electron microscopy (SEM) and the mechanical properties were investigated by compressive tests.

Grain size influences mechanical properties and grain coarsening retards densification upon sintering, thus resulting in the poor overall product properties.
During the last 10 years, research has been performed on nanocrystalline materials in order to investigate the enhancement of mechanical, optical, magnetic and electronic properties [6].
This correlates well with the observation by [18] who found that the sintering temperature was a prime factor affecting the final density of the ceramic.
This is regardless that the sample 4 exhibited the overall best densification and highest mechanical properties.
Study of factors influencing the microstructure and phase content of ultrafine Y-TZP.

The effects of material constitution on the properties of mechanical properties, dry densityand thermal conductivity for thermal insulation materials.
Analysising the test results by adopting the principle of mathematical statistics , it only needs a few representative tests to obtain the performance influence factors on the cement-based lightweight thermal insulation material, and determines the main factors in order to find the better proportion range.
By Tables 2 and 3, each factor affects each index.
The main performance of thermal insulation material is the coefficient of thermal conductivity and mechanical properties.
It is seen that the cement-bead ratio is the main factors affecting them from the data analysis.

This will results in the degeneration of mechanical properties and induce and the occurrence of embrittlement of the cladding materials [1-3].
Thus it is very significant to study the effect of He bubble on the mechanical properties of the CLAM alloy.
A two-dimensional finite element model is used to simulate the effect of helium bubble on the mechanical properties of CALM alloy.
These results indicate that the size and linear density of helium bubbles affect significantly the mechanical properties of the CALM alloy.
The microstructure and mechanical properties of China low Activation martensitic steel [J].

The present study evaluated the mechanical properties in compression parallel to grain of five pieces of wood from the roof structure of a residence undergo the fire in the rural area of Itapeva/SP.
Due to the diversity of Brazilian native woods and the factor that each species has a different mechanical behavior of each other in various applications, it is necessary to study the strength and stiffness in mechanical stresses of these species at high temperatures, aiming that projects of wooden structures can offer greater safety in case of fire.
The factors affecting the ignition of wood are well known in general: dry wood, thin wood pieces, and light wood species ignite quicker than heavy species [2].
The softening of the polymers is accompanied by significant changes in mechanical properties, especially the modulus of elasticity influencing the mechanical performance of wood [3].
These values showed a little contradictory, since with the loss of mass due to the thermal degradation it is expected the existence of a decrease in all resistances, as pointed out by Figueroa and Moraes (2009) and Eurocode 5 [9], which conclude that temperature inversely affects the mechanical properties of wood.

Experimental investigation and modeling of the homogenization processes during synthesis were used to analyze peculiarities of mass transfer and factors affecting diffusion.
This will provide improvement of mechanical properties simultaneously with better cost-effectiveness of the process.
Upon sintering, hydrogen is continuously evacuated to 20-30 ppm so that mechanical properties are not degraded.
Fine-grained microstructure is another important criterion to attain high balance of mechanical properties.
The aim of this study was to analyze peculiarities of mass transfer and factors affecting diffusion upon synthesis to attain a uniform, nearly dense material with reduced grain size at relative low temperatures and short time.