Materials Literature
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L. A. OGANESJAN Lake Problems Institute of Russian Academy of Science, St . Petersburg, Russia V. RIVKIND Department of Mathematics, St. Petersburg University, St. Petersburg, Russia Abstract . A short review is given about research in FEM in St . Petersburg We review briefly some of the mathematical results on the FE…
The aim of this contribution is to study, how the homogeneized coefficients qij depend on the shape of w and how this information can be used in material optimization of composite structures. Since we shall use the optimal shape design approach, we shall consider the restricted c lass 0 of admissible inclusions w, def…
This thesis focuses on the effects of finishing milling on fatigue damage. Machining processes such as milling are known to incur high thermomechanical loadings, which alter the geometrical (roughness) and mechanical (residual stresses, strain hardening) properties of the surface and sub-surface of produced parts. The…
ADVERTISEMENT RETURN TO ISSUEEditorialNEXTGuest Editorial: Responsive Host–Guest SystemsFeihe Huang and Lyle IsaacsView Author Information Zhejiang University University of Maryland, College ParkCite this: Acc. Chem. Res. 2014, 47, 7, 1923–1924Publication Date (Web):July 15, 2014Publication History Published online15…
The density, viscosity and sound velocity of five Schiff bases (1-5) derivatives in DMSO solutions have been studied at 303.15 K over a wide range of concentration. From these experimental data, some acoustical parameters such as Molar volume (Vm), Specific Acoustic Impedance (Z), Adiabatic compressibility (βad), Inte…
It is found that service life of Russian-manufactured ploughshares is determined by ray-shaped wear and abrasion of a deepening part of plough-point, but service life of imported components is determined by wear of cutting-blade parts of the frame. Some kinds of one-sided chisels wear can be repaired and do not cause…
When the dimension of a material is reduced from a large size, the properties remain the same at first, and then small changes occur, until finally when the size drops below 100 nm, dramatic changes in properties can occur. Materials can be nanostructured for new properties and advanced performances. This field is ope…
The increase in surface Gibbs energy of polypropy¬lene (PP) by cold barrier plasma is a promising alternative to chemical modification. The advantage of using this discharge method compared with other types such as corona or glow discharge, consists in a better process control by homogenous plasma formation and in an…
Electronic-transport properties of zigzag single-walled SiGe nanotubes of four different chiralities are studied by using density functional theory combined with nonequilibrium Green’s function formalism. Band structures of ( n,0) SiGeNTs ( n = 4−7) are computed using 1 × 1 × 100 k -point sampling. Transmission coeffi…
Equal Channel Angular Pressing is a severe plastic deformation technique to produce Ultra Fine Grain (UFG) microstructure in bulk materials. The strain induced due to the severe plastic deformation depends mainly upon the channel angle and the processing route followed. Various dies with different channel angle are mo…
Silicon is an important alloying element in Al alloys because the presence of Si improves the hardening strength of Al alloy and improves the wetting between the matrix and the reinforcement. In the present study, Al/SiC bonded specimens were fabricated by means of different temperatures and holding times. The microst…
As fossil fuels are becoming less reliable and more costly, the Proton Exchange Membrane Fuel Cell (PEMFC) is emerging as the primary candidate to replace the stationary and transport applications. In this study numerical simulation on PEMFC is done by commercially available Computational Fluid Dynamics (CFD) software…
Al7075 and Al2O3 powders were synthesized via high-energy ball mill for 15 h. Al7075 powders were mixed with 10 vol. % Al2O3, compacted by cold uniaxial compaction at 400 MPa. The green pellets were degassed at 350 oC for 30 min, and then sintered in the temperature of 600 oC under argon atmosphere for 120 min. It was…
The explorative attempt to harness new materials that could be utilized for manufacturing products with sophisticated geometry for aerospace and automotive applications necessitate the exploitation of Al-Si-Mg alloy family. Al-14Si alloys which posses 1% Mg exhibits a microstructure that contains primary Si particles,…
Diamond like carbon (DLC) is a metastable form of amorphous carbon containing fraction of sp2 and sp3 bonds. Their mechanical properties depend on the sp3 content as well as on the number and size of graphitic nanoclusters. It is noted that properties change significantly depending on the method of preparation of thes…
Abstract The aggressive properties of natural waters arise due to their specific physical properties and chemical composition. The latest analyses of certified natural and healing mineral water sources according to Act No. 538/2005 were used for the evaluation. A total of 53 sources in 26 localities were evaluated; th…
This paper helps in understanding the effects of cryogenic treatment on microstructural variation, hardness and wear behavior of Ti-6Al-4V alloy. The microstructure indicates white β-phase dispersed on the grain boundaries of dark α-phase. Cryogenic treatment at-186 °C for 10 h led to the transformation from β-phase t…
Higher manganese silicide film ( HMS , MnSix, x = 1.73–1.75) with addition of Si : B has been prepared on quartz substrate ( SiO2) by magnetron sputtering of MnSi2and Si : B (1 at.% B content) targets. It is found that the Si : B -added HMS film has a much lower electrical resistivity (R) but maintains its high Seebec…
In the present study, wear performance of Al 2219-SiCp composite was investigated and the process parameters were optimized and modeled using Response Surface Methodology (RSM) technique. In the development of the model, weight fraction of the reinforcement, sintering temperature, applied normal load on the pin and di…
The effect of intermetallic phases and grain size on ductile to brittle transition temperature of Aluminium-Iron alloy (Al–11% Fe) was investigated in this research work. An Izod impact testing method was adopted to study the DBTT in the temperature interval of 77 K to 373 K. The ductile-brittle transition points: fra…