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Introduction Boron carbide B4C is technical ceramic with superior mechanical and chemical properties.
The development of microstructure, mechanical and tribological properties change was revealed according to phase's transformation.
Instrumented indentation (Zwick Z 2.5/TS1S tester, EN ISO-14577-1) was used to quantify the mechanical properties of the composites.
The phase transformation influenced the mechanical properties change in B4C/Al composites.
Table 1 Mechanical properties of B4C/Al composites.

The surface properties requirements and possible of the modified technology Including the mechanical properties of AZ31 magnesium alloy surface: Using properties of the AZ31 magnesium alloy surface (wear resistance, corrosion resistance), AZ31 complete performance of magnesium alloy surface (surface is easy to fall off).
The choice of lubricant is one of the important factors in forming and the forming surface quality within the influence of magnesium alloy plate hot incremental.
Corrosion resistant properties and modification technology.
Magnesium alloy has a hydro-xy-apatite coating besides the mechanical properties necessary external (such as strength, toughness etc.).
Many kinds of ion implantation into elements, the injection process is controllable, without affecting the accuracy of material surface, the modified layer can make the surface corrosion, abrasion resistance and anti-fatigue ability greatly improved etc.

Three levels defined for each of the three factors were summarized in Table 1.
Stainless steel 1Cr18Ni9Ti (equivalent to AISI 321H) was used in the simulations as well as experiments, the chemical composition and mechanical properties are given in Table 2.
Table 2 Chemical composition and mechanical properties of 1Cr18Ni9Ti Chemical composition (wt %) 0.07 C, 0.29 Si, 0.7 Mn, 0.03 P, 0.002 S, 9.27 Ni, 17.47 Cr, 0.06 Ti, Balance Fe Mechanical Properties Tensile strength: 550-570MPa,Yield strength:244-258MPa, Hardness:187HV,Elongation:47%,Reduction of area:69% Results and discussion Validation of simulated results.
Other factors which are pooled do not present a statistical significance on the Fx.
But the error (P=48.6%) affects it significantly.

However, the results were wanting because of many factors.
Finally they concluded that nano-measurement is too far removed from representing macro wood mechanical properties stemming from the complexity of wood structural hierarchy [8].
It is well known that the physicomechanical properties of wood are controlled by three factors: the proportion of void volume (can be determined from the wood density); the organization of the cell wall ultrastructure (in addition to the ultrastructure of the cell wall, variety and proportion of cell types), and the moisture content [9].
Crystallinity affects significantly the physical, mechanical and chemical properties of cellulose fibers, including wood hardness [11, 12].
Čufar, Mechanical properties of sapwood versus heartwood in three different oak species.

Effect of α2 Precipitation on Creep and Tensile Properties of Ga-Added Near-α Titanium Alloys T.
A balance between mechanical properties is important to develop high-performance alloys for practical use.
It is well known that these mechanical properties are also dependent on factors of microstructure morphology such as the volume fraction and size of equiaxed α, the thickness of lamellar, etc.
In this study, W was added to the alloys because NIMS is investigating the effect of W addition on mechanical and environmental properties, although W addition is usually avoided because W could be an origin of fracture, forming hard density inclusion.
Thus, the effective factors such as microstructure morphology including the formation of α2 precipitates and chemical composition are unsurprisingly different between the tensile and creep properties.

The design variables influence factors and rules on the optimization results are summarized.
The traffic of gas tank related to material, structure, assembly process, tractor performance, road conditions and other parameters .The design pressure affect gas storage capacity, minimum wall thickness of the tank design impact the mass and strength.
In topology optimization, The design variables are the density of unit; in size optimization, the design variables are the properties of structural units, in the morphology of optimization, shape design variables is a linear combination of disturbance factors.
Fig. 7 reflects the various design points for stress distribution; Fig. 8 reflects the design variables affect the trend of the masst of the tank; Fig. 9 reflects the design parameters of the output point; Fig. 10 reflects the design sensitivity analysis variable degree of influence on the output parameters.
Mechanical design and manufacturing,2009(7),p.52,in Chinese

Carried out microstructural observations of the weld by optical microscope and tensile properties evaluated in welded condition at ambient and cryogenic (20K) temperatures are compared with parent metal properties.
Because of their high chemical reactivity, titanium alloys readily absorb gases (oxygen, hydrogen and nitrogen) and results in many problems such as low mechanical properties with catastrophic failures.
The chemical composition and mechanical properties of the billet were reported in Table 1 and Table 2 respectively.
Tensile properties of LBW welds in Ti–6Al–4V alloy at evaluated temperatures below 4500C, Mater.
Effects of microstructural factors on quasi-static and dynamic deformation behaviors of Ti–6Al–4V Alloys with Widmanstatten structures.

During the process of rapid prototyping based on robotic pulse MAG forming, the coefficient of weld reinforcement is crucial to the geometric accuracy and mechanical property of metallic parts.
Introduction Metal forming technology based on welding technology has lots of advantages such as simple equipment, high production efficiency, shaping tightness and good mechanical properties [1-7].
Their factors and levels were listed in table 1.
The range analysis results listed in Table 2 show that the order of the significance (from high to low) of factors which affect the coefficient of weld reinforcement is arc length correction, welding speed, wire feeding speed and loop inductance.
These factors have significant influence (97.8%) on coefficient of reinforcement.

The use of plant fibers, jute in this study, as reinforcements outside the polymer concrete, acquires mechanical properties, traction, and flexion, more than appreciable, however, other characteristics must be studied to ensure better integration on the market.
Resin properties provided by Maghreb Pipe are presented in Table III.
Physico-chemical and mechanical properties of jute yarns and fabric can be found in the early work of Bouguessir et al. [14].
Bourchak, Effect of eco-friendly chemical sodium bicarbonate treatment on the mechanical properties of flax fibres: Weibull statistics.
Latelli, Mechanical properties of polymer concrete made with jute fabric and waste marble powder at various woven orientations, Int.

Model of performance and affecting factors should be constructed with ANN at first.
results with orthogonal method Many factors have direct impacts on composites’ mechanical performance, three factors, such as Al2O3 volume fractions, processing temperature and stirring time are treated to be important, corresponding results are shown as table 1.
Composites,Part A 33 (2002) ,p.1135–1140 [5] M.C.Gui, J, M.Han , P.Y.Li: Microstructure and mechanical properties of Mg–Al9Zn/SiCp composite produced by vacuum stir casting process.
Materials Science and Technology, Vol.20 (2004), p.765-771 [6] Hu L X, Wang E D: Fabrication and mechanical properties of SiCw ZK51A magnesium matrix composites by two-step squeeze casting.
[12] Dong Zhibo, Wei yan-hong, Zhan xiao-hong etc.: Optimization of mechanical properties prediction models of welded joints combined neural network with genetic algorithm.