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Although unalloyed titanium is soft and does not exhibit a notably high strength, its alloys like Ti-6Al-4V demonstrate remarkable mechanical properties including high strength and hardness as shown in Table 1 [23].
Table 1: Properties of aerospace alloys at room temperature.
Aluminium alloys are among the most commonly used lightweight metallic materials as they offer many different interesting mechanical and thermal properties.
Particularly, average of these grids’ emission factors is taken as the 𝛼elec.
Table 4: Electricity carbon emission factors.

Domestic and foreign scholars have had a lot of studies on determination method and influencing factors of surface roughness [1].
The surface quality of solid wood products is one of the most important properties influencing further manufacturing processes such as finishing or strength of adhesive joints.
Laminated lumber with smoother surfaces will have a better glue line, resulting in higher strength properties.
Surface roughness of wood can be affected by various factors such as annual ring variation, wood density, cell structure, and late wood/early wood ratio.
In order to know surface quality and dimensional properties, it is necessary to employ theoretical models for prediction purpose [4].

Also the effect of added fluorides on the mechanical properties of final product was monitored.
This fact is probably due to several factors.
All these factors had negative influence on the compressive strength of alkali activated materials.
Unfortunately, the dosage of AlF3∙3H2O to alkali activated BFS affects negatively the compressive strength, therefore the compromise between the mechanical properties and the efflorescence must be taken into consideration.

Setting up the FEM model of a spacecraft catheter connector, analysis its static strength and optimized its structure, Shorten the diameter and reduced the weight of catheter connector, within the requirement of properties.
Constitutive Model of Material Properties and Non-metallic Materials.
The friction coefficient affected by many factors which related to the contact pressure, contact surface roughness, surface texture, etc., need a large number of experiments to study .The friction coefficient of this subject shown in Table 2.
[2] Courtney, T.H: Mechanical Behavior of Materials(McGraw-Hill, USA, 1990)
Cheng: Volume I of Mechanical Design Handbook (NO.4).

Literature review Droplet spreading is influenced by many factors.
One of the most important factors is surface roughness.
Methodology There are three major processes in the development of the 2-dimensional model which are domain identification and mesh development, solver and properties set up, and model initialization and solution monitoring.
In general, higher impact velocities result in greater values of spreading factors and early splashing as compared to lower impact velocities.
The texture of the substrate also affects the droplet impact behavior.

The interpretation of ECT signals, however, is known as a truly difficult task due to the influence of various factors including the variation in geometry and material properties of steam generator tubes.
They are also affected by the non-flaw factors that include localized variation in electromagnetic properties of the SG tubes as well as the geometric variation such as dent, bulge and diameter change.
Existence of the external objects such as support plate and sludge with magnetite is one of the important factors affecting ECT signals.
(a) Diameter changes and (b) variances in electromagnetic properties of the tube.
Two factors in diameter changes were considered: amount of diameter change ( r∆ ) and the slope of diameter change ( eLr /∆ ).

Through this development, the improvement is defined by enhancing surface properties by wear resistant and TBC on the selected gas turbine combustor components such as transition piece, bull horn and flow sleeve.
Wear resistant materials in this paper refer to Haynes 25 (the other name is L605) and Stellite 6. [4] Haynes 25 is a cobalt-based alloy which combines good formability and excellent high temperature properties.
These factors can lower weld ductility and promote cracking.
They are resistant to wear, galling and corrosion and retain these properties at high temperatures.
The measures may involve improvement in modification of surface properties to reduce wear.

Thermal-mechanical treatment has been proved to be a effective way to improve the overall property of aluminum alloy[1].
In current strengthening theory, mathematical expressions of different strengthening method are given respectively, and the material’s strength is given as simple superposition of different strengthening factors’ contributions [2, 3].
Results and Discussion Mechanical Properties.
Mechanical property is the most important technical specification in structural material evaluation.
Fig. 2 Evolution of mechanical properties for cold rolled samples in the process of aging at different temperature, (a) 120°C; (b) 100°C Characterization of Precipitation.

Li et al. [7] presented a new approach to the modeling and simulation of the forces in helical end milling, where the forces are modeled by means of the predictive machining theory, and machining characteristics are predicted from fundamental work piece material properties, tool geometry and cutting conditions.
Experimental workplace and applied type of ball end milling cutter An idea of applying Taguchi designs is based on a fact that not all factors that produce variability of results can be controlled and such uncontrollable factors are referred to as noise factors.
Taguchi designs are to identify controllable factors that minimize the effect of the noise factors in experiments.
Results and their interpretation Measurement of all the components of the forces when ball end milling clearly shows that there is definite relationship between the forces as such and relevant effect of the control factors from Table 1.
Because of wide variety of factors affecting ball end milling of form surfaces, measurements were performed in milling planar surfaces.

In the low stress intensity factor range (△K) region, the FCP rate in Nugget Zone (NZ) was lower than that in AS of the HAZ, but in the high △K region, the situation was contrary.
Compared with the standard of International Institute of Welding (IIW), FCP rates in all regions were lower and it concluded nice fatigue properties of FSW 7075-T6.
However, data concerning mechanical behavior of FSW joints is still destitute.
Table 1 and Table 2 summarize its typical chemical composition and some mechanical properties.
This phenomenon is affected by the combined action of two facts.