Materials Literature
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Abstract During different aluminum smelting processes occur direct contact of liquid metal and carbon materials, which are the main constituent for the lining of the cells, furnaces, crucibles and ladles, etc. As a result, processes of aluminium carbide formation at the interfacial area and its subsequent dissolution…
Abstract In the evaporative pattern casting process, the surface of a polystyrene pattern (Styrofoam) is coated with a ceramic layer. This ceramic layer, which coats the evaporative pattern, should have specific physiochemical properties including: resistance to thermal, chemical, and erosive activity of molten metal…
An alternative procedure for the determination of the FLC0 value, the limit strain value corresponding to the plane strain mode of the Forming Limit Curves (FLC), a critical parameter in the sheet formability analysis, is suggested and compared with conventional Nakazima simulation tests. The procedure was tested usin…
Abstract The influence of isothermal annealing on the magnetisation process in strong magnetic fields of the amorphous Fe61Co10Y8Ni1B20 alloy ribbons was investigated. Samples in the form of ribbons were produced by rapid quenching of liquid alloy on a rotating copper wheel. In order to study the relaxation process, t…
Przepływ gazów z pyłem w przeciwprądzie do materiałów wsadowych występuje w wielu procesach chemicznych. W szybowych agregatach metalurgicznych procesy fizykochemiczne zachodzą także w układzie przeciwprądowym Istotnym jest by w tym wielofazowym układzie nie dochodziło do zakłóceń przepływu. W warunkach rzeczywistych…
This paper presents a mechanical system with a similar configuration to a human musculo-skeletal system for use in anthropomorphic robots or as artificial limbs for disabled persons. First, a mechanical module called ANLES (Actuator with Non-Linear Elasticity System) is introduced. There are two types of ANLES: the li…
Abstract This work paper presents the results of HV 0.5 microhardness measurements and structural documentation of copper before and after the concurrent elongating flow forming process. No strain work hardening of products was noted. The cause of this behavior was recognized to be the location of strain strain locali…
Pękanie gorące jest jednym z głównych problemów odlewania stopów magnezu oraz ich łączenia przez spawanie. Po- mimo licznych badań, w praktyce przemysłowej ten rodzaj pękania nadal stanowi istotny problem. W pracy przedstawiono wpływ czynników metalurgicznych, konstrukcyjnych i technologicznych na skłonność stopu QE22…
In this study, the effects of fly ash on Khorasan mortar composed of brick or tile powder and lime were investigated to improve its mechanical properties. In the mixtures, fly ash was used instead of 0- to 4-mm crushed tile or 0- to 1-mm tile powder as aggregate. In addition, slaked lime was used as a binder, and 0–10…
Formation mechanism of ledeburites in laser alloying composite coating on a titanium alloy was investigated. The amorphous reinforced composite coatings were fabricated on the TA2 alloys by laser alloying of Co-Al-Fe-TiC/C mixed powders. Through the X-ray diffraction and high resolution transmission electron microscop…
In emerging countries, the driving elements for sustainable development are greenhouse and global warming concerns and the need for the development of low-CO2 cements as replacement for Portland cement. Pumice is an aluminosilicate-type material that can be condensed with NaOH and Na2SiO3 solution and can be used for…
This paper is concerned with the numerical solution of polymer melt flows of both extrudate-swell and tube-tooling die-extrusion coatings, using a hybrid finite element/finite volume discretisation fe/fv. Extrudate-swell presents a single dynamic freesurface, whilst the complex polymer melt coating flow exhibit two se…
W artykule zaprezentowano możliwości integracji nowoczesnych technologii wykonania oprzyrządowania odlewniczego oraz metod optymalizacji konstrukcji. Systemy przyrostowego wytwarzania (ang. additiv manufacturing, AM) pozwalają na projektowanie bardzo złożonych kształtów konstrukcji, spełniających w znacznie większym s…
Abstract The article deals with the influence of annealing parameters on evolution of microstructure and mechanical properties of dual phase steel. Dual phase steel was annealed in laboratory conditions according to the three chosen cycles of annealing: into intercritical region (780°C), into austenite region (920°C)…
Rheological and electrical properties of polymeric nanoparticle solutions and their influence on the rheological and electrical properties of red blood cell (RBC) suspensions have been studied. Poly(acrylic acid) macromolecules of different architecture and molecular weight were used: (i) a new core-shell type star po…
In the present work the MMT-Na+ clay was functionalized with 3-aminopropyltriethoxysilane (γ-APS) and incorporated in a commercial formulation epoxy-based powder coating in a proportion of 8 wt% and applied on 1008 carbon steel panels by electrostatic spray. Adhesion, flexibility, impact and corrosion performance in s…
The purpose of this work is to present a ball-cratering equipment configuration to measure the coefficient of friction. Two load cells were used to measure, in real time, the “normal” and “tangential” forces during the experiments to calculate the coefficient of friction. Micro-abrasive wear tests were conducted on an…
The fracture behavior of polymer-bonded explosive (PBX) seriously affects the safety and reliability of weapon system. The effects of interface debonding and initial meso-damage on the fracture behavior of PBX under quasi-static tension are studied using numerical method. A two-dimensional representative volume elemen…
Surface hydrophobicity of poly (lactic acid) have raise the concerns of surface incompatibility of PLA to function as biomaterial. Thus, various approaches have been made to improve the surface hydrophilicity of PLA. In the present paper, PLA materials were surface modified by alkaline hydrolysis. The indication of th…
Fundamental understanding of the self-assembly of domains in block copolymers (BCPs) and capabilities in control of these processes are important for their use as nanoscale templates in various applications. This paper focuses on the self-assembly of spin-cast and printed poly(styrene-block-methyl methacrylate) BCPs o…