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They also offer improved high temperature performance, as well as better wear resistance properties.
Reinforcement with continuous fibers or whiskers yields large increases in mechanical properties, but with extreme directionally.
As the particles have no preferred orientation, the material properties are largely isotropic [2].
It also allows other physical phenomena such as defect formation and microstructural changes of the material, as well as other important factors such as die wear, etc., to be examined, which are difficult and costly to do by experimental means.
This mean that the effect of metal matrix properties did changed the deformation of material flow in the extrusion process [5].

Mild steel possesses unique properties that enables their continual use in engineering applications such as being recyclable, ease of fabrication, adjustable metallurgical, mechanical and physical properties, low cost and ready availability [1, 2].
The physical and mechanical properties of aluminum can be modified precisely to the specific demands of various applications.
Research on plant extracts are promising but have been hampered by their biodegradability, short shelf life and poor adsorption properties.
The values of the mean square ratio are greater than the theoretical significance factor thus the statistical relevance factors are relevant.
Obot, Inhibitive properties, thermodynamic and quantum chemical studies of alloxazine on mild steel corrosion in H2SO4, Corros.

Proper design of bearings is among factors of controlling material flow in this process and has an important role in scrap rate reduction.
Proper design of bearings is among important factors in the control of material flow in direct extrusion process.
This method doesn’t affect stable time steps, and also exerts more precise force for compensating penetration.
One of the important factors in bearing design is uniformity of material flow out of the die.
Middleditch: Bearing Length for Extrusion Dies: Rationale, Current Practice, and Requirement for Automation, Journal of Mechanical Processing Tech.

INTRODUCTION Application of variable loading to machine components leads to a change in the material properties caused by many different factors.
Properties of the steel under loadings: [5, 13]: - static: Re = Sy = 458 MPa, Rm = Su = 682 MPa, E = 2.15·105 MPa, A5 = 24.3% and Z = 44.3%; - cyclic: m = 9.80, b = -0.1033, c = -0.4755, ef’ = 0.2179, sf’ = 1204 MPa, n’ = 0.1976, K’ = 1233 MPa.
The shape of the loop is affected by the level of maximal stresses.
Mrozinski, Stabilization of cyclic properties in metals and its influence on fatigue life, (in Polish), Monographs nr 128, Publishing house University of Science and Technology, Bydgoszcz, 2008
Ligaj, Description of cyclic properties of steel in variability conditions of mean values and amplitudes of loading cycles, Fatigue Failure and Fracture Mechanics, Book series: Materials Science Forum, vol.: 726 (2012), pp. 69-76

Introduction Al-Mg alloy sheets have been used as an auto body panel material, because of their well balanced properties such as press-formability, ductility and mechanical strength.
Comparative study has been conducted on the properties of the sheets by AWR and by conventional rolling (CR).
T4 sheets kept for 7days at 293-298K after the SHT were examined for the mechanical properties, Lankford value (r-value), drawability, crystallographic texture and bake-hardening (BH) response.
Other tensile properties of the T4 sheets by CR and AWR are summarized in Fig.3.
We believe there is room for optimizing heat treatment conditions and other factors for further improvement of the AWRed Al-Mg-Cu alloy sheets, especially in bake-hardening response, and we are now making an effort on that point .

Moreover, to estimate the bond strength, K factors (fracture toughness index) at different bonding ratios were evaluated using a finite element method simulation.
K factors at different granule sizes were evaluated at the crack tip during shearing and compared with each other.
(1) Table 1 summarizes the mechanical properties of materials used in this FEM analysis.
Through simulation, we concluded that the granule fracture was mainly affected by KI, which results from the rotational motion of a granule by shear movement.

M Casals [4] explains that, researchers analysed 3647 errors in 68 buildings, defects were settled in 3 categories –location, sub-contractors involved, affected building element .it refers failure is due to poor workmanship by subcontractors and the location affected mostly is roofs and floors.
L Sousa [6] observed that, this study looked at two types of stone in Portugal to see how these factors & quality of these stones by analysing mechanical properties, weathering effects, fracture patterns.
Roofs: For bigger buildings in particular, steel trusses, beams, and decking may be common, which affects the percentage overall.

Polyetheretherketone (PEEK) has been considered as a suitable polymer in such coatings based on its biocompatibility and mechanical stability [4].
Among biomaterials with bioactive properties, bioactive glasses (BGs) are well known for their ability to interact with biological fluids inducing the formation of a hydroxyapatite (HAp) layer on the surface, which induces effective attachment of bone in vivo [5].
Among the elements that posses a beneficial effect, boron (B) is very interesting for its ability to stimulate wound healing in vivo, to release growth factors and cytokines, to increase the extracellular matrix turnover and for its role in bone physiology and angiogenesis [7, 8].
XRD analysis (Fig. 1c) confirms the presence of hydroxyapatite already after one day of SBF treatment. 45S5-B1 and 45S5-B3 glasses showed the same behaviour, which indicates that the presence of B2O3 does not modify the bioactivity of 45S5 glass and that it can substitute both SiO2 and P2O5 without affecting the glass reactivity.
Immersion tests in SBF demonstrated thus that incorporation of boron to the 45S5 glass composition does not affect its reactivity in SBF solution.

It is not difficult to see from above influence factors that the sizes of δ- phase is the most significant.
(a) (b) (c) (d) Fig. 3 Schematic of peritectic reaction in continuous casting slabs (a) shape of solid-liquid interface and distributions of carbon atoms (b) peritectic reaction (c) formation of the micropores (d) granulation of γ- phase Effects of δ→γ Phase Transformation on the Crack Formation of Continuous Casting Slabs The formation of micropores mentioned above is the result of the phase transformation shrinkage during the δ→γ phase transformation at high temperature, generating the great influence on mechanical behavior under high temperature of steel.
However, the micropores formed under high temperature will not obviously affect the room mechanical properties of steel, because these micropores will be vanished under the squeezing action of bulging force caused by the expansion appearance during γ→α phase transformation at lower temperature.
At high temperature region, the plasticity of γ- phase is relatively high because the micropores formed by γ→δ phase transformation do not influence obviously on the mechanical properties of the steel.

And even in presence of high signal-to-noise ratios, the factors influencing their properties are multiple, e.g. presence and type of lubrication, temperature, load, defect (presence, size, position, type).
amplitude, rms, energy) to more sophisticated analyses (AR models, statistical properties, wavelet transform).
The absence of a couplant and the vinylic glue have produced, in presence of an almost constant input signal, a spread of results which is not acceptable but even wax, grease and cyno-acrylic glue are affected by some variability.
Lim: Mechanical Systems and Signal Processing, Vol. 21 (2007), p. 1115
Mba: Mechanical Systems and Signal Processing, Vol. 18 (2004), p. 849