Materials Literature
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In this research, it was searched that magnetostrictive materials for sensors by using combinatorial method. Combinatorial method is the one of the useful method that could search for optical composition of alloy materials or novel alloy materials. In this method, samples having various compositions are synthesized on…
Pravilno izvedena tehnologija zaštite može se znatno produljiti vijek službe broda. Najraširenija metoda zaštite u brodogradnji su premazi. Zaštitni premazi se koriste za privremenu zaštitu limova prije obrade te za trajnu zaštitu od korozije i obraštanja sagrađene brodske konstrukcije. Nekvalitetni premazi ili njihov…
A new fabrication method for realizing ordered nanopillar array is developed. In this method, firstly, a nanodot array is fabricated by combination of Nano Plastic Forming (NPF) and thermal dewetting, which does not involve costly and complicated processes such as EB-lithography. Then the Au-capped nanopillar arrays a…
The elastic-plastic constitutive equation with the stress-dependent effect on phase transformation is proposed, but there are few experimental examples to verify the accuracy of the equation. Therefore,the transformation plasticity (TP) strain during pealrite reaction of S45C was measured when the hollow specimen was…
In order to develop a new heat transfer procedure of impinging jet, we conduct a DNS (direct numerical simulation) of controlled impinging jet. As a proposed procedure, a nozzle is rotated around a given axis normal to the impinging wall. Prom view of instantaneous velocity magnitude and instantaneous vortex structure…
The surface of a TiNi shape memory alloy (SMA) tape was treated by ultrasonic shot peening (USP), and the influence of the USP on the bending fatigue properties was investigated. The results obtained can be summarized as follows. (1) If SMA was shot-peened, the fatigue life becomes longer. The larger the bending strai…
The effect of crystal orientation on indentation hardness and its microstructural evolution in HCP metals, i.e., magnesium, was investigated by experiments and calculations. The experimental results obtained by nanoindentation showed that the hardness of prismatic plane was slightly harder compared to that of basal pl…
The mechanical properties of low-density expanded polypropylene(EPP) are investigated by the newly designed testing machine. In order to prevent bucking, the shape of compression specimen are a cube which is formed by the adhesion of multi EPP sheets. The strain rate dependency of the flow stress was observed. Stress…
In the literature, there are experimental studies, confirming the significant effect of the degree of concentration of the active components of corrosive medium on the corrosion process. These results are presented in tables and graphs that describe the dependencies of the time before corrosion damage on the mechanica…
The deformation mechanism of the extruded AZ31 magnesium alloy rod under various deformation conditions was studied. From the result, the yield mechanism of AZ31 magnesium alloy is a non basal slip from 423K to 673K when this material is subjected to tensile stress parallel to the extruded direction to which transgran…
Homogeneous Charge Compression Ignition (HCCI) engines are being widely researched today, having attracted considerable interest for their low emissions and high efficiency. However, HCCI engines have a narrow range of stable operation owing to the occurrence of extremely rapid combustion at high loads and misfiring a…
Microstructure dependence of elastic modulus and internal friction of APSed CoNiCrAlY was investigated using resonance ultrasound spectroscopy. The freestanding coatings with different spraying powder sizes are prepared. Further, the annealed coatings were prepared. The specimens were oscillated using a transducer, an…
We present theoretical and experimental results on the fracture behavior of single-edge precracked giant magnetostrictive materials under magnetic fields. The crack was created normal to the direction of easy magnetization. Three-point bending fracture tests were carried out, and the fracture loads were measured. Plan…
Nanometric multiferroic LaFe1-yi£? yO3, (0.0 ≤ y ≤ 0.03, step 0.01) samples were successfully synthesized using citrate autocombustion method. The X-ray diffraction (XRD) data reveal that all the samples have single phase orthorhmbic structure. The high resolution transmission electron microscope (HRTEM), energy dispe…
Generally, chrome thin film is used for shading material of a photo mask. Pattern precision of the chrome mask is unstable in chrome wet etching, and process cost and environmental risk increase in chrome dry etching using chlorine gas. In this study, we investigate dry etching method using non-chlorine gas for the Cr…
To understand deformation mechanisms of non-basal slip in magnesium, [1010] tensile tests were carried on pure magnesium single crystals in various temperatures. While the crystal fractured as brittle manner at room temperature, the crystals were deformed by {1011}<1123> first order pyramidal slip and showed ductility…
Focused-ion-beam chemical vapor deposition (FIB-CVD) is a useful tool for nanostructure fabrication because it enables us to fabricate the arbitrary three-dimensional (3-D) nano- and microstructures. In this study, a method for the homogeneous growth of ultra-long overhang nanostructures was investigated. As a result,…
Effects of ambient temperature, O_2 concentration and injection duration on combustion and emission characteristics of diesel spray under high temperature and high pressure ambient were experimentally examined using a constant volume vessel. It is confirmed that the ambient temperature /pressure has large effect on th…
Det stigende antal nanomaterialer, som introduceres på markedet disse år, øger behovet for risikovurdering af disse materialer. Da det ikke er muligt at vurdere risikoen særskilt for hvert enkelt nanomateriale, er der behov for en forskningsstrategi på området, som prioriterer de tilgængelige økonomiske og tidsmæssige…
The uniqueness of a solution in the small sense (in the sense of lack of infinitely close solution) is proved for the boundary-value problem of equallystressed reinforcing metal composite plates in conditions of steady creep of materials of all phases of the composition, when in addition to static and kinematic boundar…