Materials Literature
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An extensive experimental study has been performed for starve fed single screw extrusion of polymer blends. Several materials have been used in the study: LDPE/PS, PP/PS, PP/PMMA, and HDPE/PS blends. “Screw Pulling-out Technique” has been used to study the melting mechanism and flow in the machine. CSM melting mechani…
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High temperature refractory materials and alloys including Mo and TZM have been considered and studied to assess their applicability in fusion reactor applications in addition to spallation targets in particle accelerators. The impacts of neutron, proton and ion irradiation on the properties and microstructure of pure…
The utilization of biogas for the production of valuable chemicals is among the very important processes in the energy research field. The most suitable process for biogas reforming is dry reforming of methane. An obvious drawback is the variable composition of biogas rather than the stoichiometrically equimolar quant…
The growing steel prices have significantly affected the manufacturing expenditure in automobile and household industries, thus making a strong case for substituting steels with materials having lightweight and high-strength to weight ratio. The aluminum and its alloys have outstanding properties such as lightweight,…
The present work describes microstructure, texture, mechanical and ballistic properties correlation of a hot rolled and peak aged AA-7017 alloy plate at surface and centre. Both the microstructures and textures are different on the surface and centre of the plate. The surface of the plate shows recrystallized grains a…
Collagen base biomaterials are widely applied in the field of tissue engineering. However, these fibrous proteins in animal connective tissues are insufficient to fulfill the mechanical properties for such applications. Therefore, alginate as a natural polysaccharide was incorporated. In this study, Smooth wolf herrin…
Based on Frenkel’s Newtonian viscous flow approach [1] and Mackenzie and Shuttleworth’s [2] extension accounting for trapped gas, a model for the shrinkage of a gaseous pore in a viscoelastic polymer melt driven by surface tension was developed. The viscoelastic flow of polymeric materials was considered by using a si…
The paper studies the influence of hydrogenation duration on structural and phase transformations, deformation mechanisms and mechanical properties of metastable austenitic steel Fe-18Cr-9Ni-0.5Ti-0.08C (in wt %) processed under cold rolling. Plastic deformation under rolling produces a two-phase (γ + α′) grain/subgra…
The POXR and SMR methods adopted in producing hydrogen from methane gas are simulated and exergy analysis of both the processes are run for comparison. The effective parameters of the feeding materials ratio and the system temperature for maximizing hydrogen production and increasing efficiency are assessed here. Infl…
Deep drawing is one of the most commonly used sheet metal forming processes, which can produce metal parts at a high rate. One of the major problems in deep drawing is springback, which is mainly elastic deformation occurring when the tool is removed. The focus of this work is the prediction of springback in deep draw…
We show that a phenomenological model based on sublattice magnetization describes the temperature and field dependent magnetism in the Ag$_2$FeGeSe$_4$ semiconductor compound with wurtz-stannite-type structure. The model successfully finds the antiferromagnetic (AF), spin flop (SF) and paramagnetic (P) phases for all…
In this article the results of the strength analysis of nuclear power plant structures in case of aircraft crash impact problem are presented.Finite element analysis was performed using ABAQUS CAE system. Nonlinear material models were used, such as “Concrete damaged plasticity” and “Drucker-Prager” for concrete and e…
High temperature mechanical properties of Mg alloys could be improved effectively by adding Zr and rare earth (RE) elements, such as Gd and Y, in Mg matrix. In order to achieve the sufficient utilization of both the volume and properties Mg–Gd–Y–Zn–Zr alloys, semisolid forming (SSF) is one of the most potential method…
使用済み燃料プール（SFP）の冷却不全または冷却水損失による重大事故が発生した場合，使用済み燃料被覆管は空気中に露出し，崩壊熱による温度上昇が起こる．そのため空気中での燃料被覆管の高温酸化の研究を行うことがSFPの安全性評価のために重要である．本研究では，燃料被覆管材料であるジルカロイ2（Zry2）およびジルカロイ4（Zry4）を用いて，温度及び空気の流量を変化させた条件における熱天秤による酸化試験を行った．熱天秤の試験では試験温度の上昇に伴い酸化速度が上昇する傾向が見られた．また，空気の流量を使用済み燃料ラック内でSFP事故時に想定される範囲で変化させた場合は，Zry2では950℃以下，Zry4では1050℃以下において，明らか…
Organometal halide perovskite solar cells (Omh-PSCs) have attracted attention due to its unique electrical and optical properties. Ideally, the Omh-PSCs should remain free from degradation under normal operating conditions for several years, preferably tens of years. In order to produce high power conversion efficienc…
Diversity of subaerial biofilm forming cyanobacteria, algae and fungi was investigated on 10 different substrata from greenhouse of Botanical Garden ?Jevremovac?. Out of 37 documented taxa, 16 cyanobacterial and 10 algal taxa were identified. Remaining 11 taxa belong to the Kingdom of Fungi. The highest diversity of b…
The paper provides a brief summary of costs necessary to obtain nanosized magnesian powders when utilizing amorphous magnesite by-products. It also describes new methods accounting and allocation of common costs among products when processing and utilizing amorphous magnesite by-products in dynamic market conditions.…
The two-dimensional isolation oxidation of silicon is considered for stress-dependent reaction and diffusion coefficients. The influence of such parameters is investigated numerically and asymptotically in the bird's beak problem and for curved geometries arising in the oxidation of cylindrical and spherical structure…
Poly(3-hydroxy butyrate)-co-(3-hydroxy valerate) (PHBV) is a biobased and biodegradable polyester. This semicrystalline bioplastic could be a good candidate for the replacement of some commodity plastics derived from oil. However, the control of the conditions of its processing in order to obtain optimal properties of…