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The solid-state joining process produces welds with improved mechanical properties and reduced distortion.
Higher Carbon Steels are extensively used in different industrial applications such as shipbuilding and automobile industries due to their superior mechanical properties.
Experimental Work Identification of Predominant Factors.
The main parameters are caused to the temperature effort and then affecting the tensile properties, Hardness property variations occur in all FW joints.
This sample experiment was conducted by keeping one of the factors is constant and the other factor is changeable.

Clarifying the role of the factors, influencing the properties of the composites, enable us to choose the suitable processing method for obtaining the composites and to improve the different properties of these systems.
The achievement of metallic properties in such composites depends on many factors, and it is just the possibility of controlling the electrical and physical characteristics.
By now, hundreds of publications have reported certain aspects of the mechanical and thermal enhancement of different polymer systems by CNTs [29]. 2.2.1 Mechanical properties The superlative mechanical properties of carbon nanotubes make them the filler material of choice for composite reinforcement.
The presence of an interfacial resistance between the nanotube and the matrix material has been cited as the principal factors affecting heat flow in CNT polymer composites.
LORENTS, "MECHANICAL AND THERMAL PROPERTIES OF CARBON NANOTUBES," Carbon, vol. 33, pp. 925-930, 1995

Mechanical strength and anti-corrosion of materials will affect pressure vessel application.
Composite material pressure vessels failure factors are affected not only by subjective factors but also objective factors. 4.1 Subjective Factors Composite pressure vessels are generally made of glass fiber, carbon fiber, Kevlar fiber or Aramid fiber.
According to different fibers, strength properties are obviously different.
Stress break is one of materials properties.
Carbon fiber has a good bearing load property under long-term loads, therefore it is used widely. 4.2 Objective Factors Besides the subjective factors, there are also some objective factors as followed: (1) Load cycle: as mentioned above, material properties loaded have a certain cycle.

Other workers used a five-factor, 2-level, 1/2 fractional factorial designs with 4 centre points to identify critical factors affecting shrinkage porosity in permanent mould casting [8].
Porosity is a common defect in cast and sintered aluminium alloys and strongly influences their final mechanical properties, i.e a drop in strength and ductility of the materials.
In summary, reducing porosity and fold defects will not only improve the mechanical properties but also increase the production efficiency and marketability of castings [10].
Experiment Details Brainstorming session was conducted to summarize the factors affecting the quality of the LFC castings into a cause–effect diagram as shown in Fig. 1.
Farnsworth: Identification of critical factors affecting shrinkage porosity in permanent mold casting using numerical simulations based on design of experiments, J.

These materials have very good hot mechanical properties [25].
The effect of sampling direction on mechanical properties was examined.
Mechanical properties of SpNSR and SpNSP group.
Mechanical properties of Sp BT-FSW and Sp C-FSW specimens.
In addition, the welding parameters (rotational and advance speed), and manufacturing process are major factors in the BT-FSW welding process.

In this paper, poly β-hydroxy butyrate (PHB) was extracted from H2 production fermentation residue of photosynthetic bacteria, the best separation and extracted conditions was optimized, the interaction of different factors affecting the extraction rate of the PHB was analyzed, the molecular weight and the purity of extracted PHB were also studied.
PHB had general chemical synthesis plastic properties, also had some particular properties such as biodegradation and biocompatibility which was considered as a new alternative polymer plastic products to eliminate "white pollution" and obtained widespread attention[3]. besides, PHB also had piezoelectric, optical activity and utilization of renewable materials during the process of biosynthesis can be used in many fields such as medicine, pharmacy, agriculture, electronics, and have broad application prospects [4-6].
In this paper, the separation and extraction conditions of PHB from H2 production fermentation residue by photosynthetic bacteria were studied, the correlation of different factors affecting PHB extraction rate was analyzed, and the extracted PHB were also identified with GC analysis.
PHB extraction also affected by cell concentration, Extracted pH, extraction temperature and other factors, based on the single-factor test result take cell concentration, Extracted pH and extraction temperature as independent variables, take PHB extraction rate as response value, using response surface analysis to research different factors on the impact of PHB extraction rate, study the relationship between the different factors, and optimize the best extraction conditions, the results shows in Figure 4 - Figure 6[15,16].
In summary, among the three factors of extracted pH value, cell concentration and extracted temperature affecting the extraction rate of PHB extracted pH value was the most significant factors influence the PHB extraction rate, cell concentration followed ,and extracted temperature was the weakest factors, which has the same conclusion with the three factors p-valu.

This machinability study three factors and three levels is used to optimize the process parameters, in this work from the investigation of mechanical properties it was notice that Al6061 Alloy with various weight percentage of nano tungsten carbide (WC) aluminium composite is superior in mechanical properties than the Al6061 Alloy with varying the weight percentage of Silicon carbide (WC).
It is cleared from percentage of contribution that cutting speed is the majorly affecting factor of (33.54%) followed by depth of cut (29.68%) on MRR.
"Titanium particulate metal matrix composites–Reinforcement, production methods, and mechanical properties."
"Investigating the mechanical properties of tungsten carbide metal matrix composites with Al 6061." 
"Modeling of mechanical properties and high temperature wear behavior of Al7075/SiC/CRS composite using RSM."

The Effect of Structure on Mechanical and Corrosion Properties of Austenitic Steel Subjected to Neutron Irradiation Marina M.
Corrosion behavior, mechanical properties are analyzed in the temperature range of 20…650 °С.
One of the most important factors connected with the radiation resistance is material’s susceptibility to intergranular corrosion.
The mechanical properties of steel samples 18Cr-9Ni in initial state and after ECAP Тtest.
The mechanical properties of AISI 321 steel samples after irradiation in BOR-60 reactor at T = 350 ° C and damage dose 5.3 dpa Тtest.

The eight control factors were designed in an L18 factorial orthogonal array experiment, and the effects of the control parameters on the surface properties were critically evaluated in the experiments.
Statistical Variation Estimation affecting Coating Characteristics Table 3 Selecting significantly factors from analysis of variance Symbol Sum of Squares Degree of Freedom Mean square F-test Contribution percent A 0.089 1.0 0.089 3.301 1.44 B 0.243 2.0 0.121 4.504 3.93 C 0.602 2.0 0.301 11.167 9.74 D 1.213 2.0 0.607 22.489 19.62 E 0.324 2.0 0.162 6.004 5.24 F 1.405 2.0 0.702 26.039 22.72 G 0.714 2.0 0.357 13.228 11.54 H 1.540 2.0 0.770 28.550 24.91 Error 0.054 2.0 0.027 1.000 0.87 Total 6.185 17.0 100.00 The analysis of variance explores the control factors that significantly affect the quality characteristics of integrated properties.
It can be found that travel speed, powder feeder rate, carrier gas and primary gas accounting for nearly the 78.79% of total variance affecting the integrated properties.
The experimental results identify that travel speed, powder feeder rate, carrier gas and primary gas are the main parameters among the eight control factors that significantly influence the surface properties in plasma sprayed coatings, in which these factors account for nearly 78.79％the experimental variation.
By applying significant factors from analysis of variance in the grey relational analysis, the surface properties could be effectively improved in this study. 3.

Additionally, the central composite design method of Box-Wilson for second order factors was used to predict the EPS and BA effects on the polystyrene concrete properties.
Besides, the main properties of the tested specimens also were investigated.
Levels and intervals of the CCD varying factors Parameter factors Description factors Levels varying factors Intervals varying factors -1.414 -1 0 +1 +1.414 BA amount (%) x1 14.5 20 30 40 45.5 10% and 5.5% EPS Amount (%) x2 24.5 30 40 50 55.5 10% and 5.5% The number of the CCD experiments for the two factors is indicated by formula (2): N = 2k +2×k + m. (2) where: k is the factors number (k = 2) and m is the trials number repeating at the center (m = 5 as suggested by Williams [1] and Wackerly et al. [2]).
In the future, further investigations have to be carried out to study the ways where bottom ash as a natural fine aggregate replacement and expanded polystyrene waste as a lightweight aggregate in concrete, which affects the rheological properties of fresh concrete, mechanical and durability properties of hardened mass.
Mechanical properties of EPS lightweight concrete, Construction Materials, 164, CM4 (2011), 173-180