Search results for: BISMUTH–TELLURIUM ALLOY
-
Comprehensive Evaluation of the Biological Properties of Surface-Modified Titanium Alloy Implants
PublicationAn increasing interest in the fabrication of implants made of titanium and its alloys results from their capacity to be integrated into the bone system. This integration is facilitated by different modifications of the implant surface. Here, we assessed the bioactivity of amorphous titania nanoporous and nanotubular coatings (TNTs), produced by electrochemical oxidation of Ti6Al4V orthopedic implants’ surface. The chemical composition...
-
Cryogenic Treatment Effect on Cyclic Behavior of Ni54Ti46 Shape Memory Alloy
Publication -
The Influence of ZnO Oxide Layer on the Physicochemical Behavior of Ti6Al4V Titanium Alloy
Publication -
Applications of the artificial intelligence methods for modeling of the ACAlSi7Cu alloy crystallization process
Publication -
Determination of grain shape of laser-irradiated FePdCu thin alloy films
Publication -
Tribological and corrosion testing of surface engineered surgical grade CoCrMo alloy
Publication -
Composite and Surface Functionalization of Ultrafine-Grained Ti23Zr25Nb Alloy for Medical Applications
Publication -
Creation and characteristics of the (Mn-N-O) surface layers on aluminium alloy
PublicationPrzedstawiono koncepcję tworzenia warstw powierzchniowych zawierających mangan, azot i tlen. Warstwy wykazują twardość powierzchniową 358 HV0,01, zwiększoną odporność na korozję w kwasie siarkowym oraz odporność na zużycie ścierne w skojarzeniu z żeliwem szarym.
-
Impact of plastic deformation on magnetoacoustic properties of Fe-2%Si alloy
PublicationW artykule przedstawiono wyniki komplementarnych badań własności magnetycznych stopu Fe-2%Si po deformacji plastycznej. Badania obejmowały pomiary pętli histerezy magnetycznej B(H), magnetycznego efektu Barkhausena oraz emisjii magnetoakustycznej. Badane próbki poddane były deformacji plastycznej do poziomu sięgajćego 8%. Właściwości pętli histerezy zostały skwantyfikowane z wykorzystaniem pola koercji oraz maksymalnej magnetycznej...
-
Microstructural aspects of hydrogen degradation of the 26H2MF and 34HNM constructional alloy steels
PublicationPodatność na degradację wywołaną przez wodór, dwóch gatunków polskich stali konstrukcyjnych stopowych: 26H2MF i 34HNM, określano przy pomocy próby powolnego rozciągania. Mierzono następujące parametry: energię pękania, wydłużenie, wytrzymałość na rozciąganie i przewężenie. Degradację stali obserwowano w 0,01M kwasie siarkowym przy gęstości prądu 20 mA/cm2 wraz z rodzajem przełomów. Poziom degradacji był zgodny z ilością wodoru...
-
Imaging of grains and internal stresses in GO Fe-Si alloy with Barkhauseneffects
PublicationBadano próbki stali transformatorowej Fe-Si ze strukturą zorientowaną (GO). Polowy efekt Barkhausena wykorzystano do zobrazowania ziaren pod warstwą ochronną a poziom naprężeń wewnętrznych wyznaczono wykorzystując mechaniczny efekt Barkhausena.
-
Microstructure and wear of cast aluminium alloy with laser modified surface layer
Publicationprzedstawiono wyniki badań zużycia przez tarcie przetopionego laserowo stopuAlSi13MgCuNi w warunkach tribologicznych. Wykazano, iż zużycie i współczyn-nik tarcia są zależne od parametrów obróbki laserowej w warunkach kriogeni-cznych.
-
The design of the prosthetic index finger actuated by shape memory alloy wires
PublicationZaprezentowano projekt palca wskazującego protezy ręki, w którym poszczególne człony napędzane są za pomocą niekonwencjonalnych efektorów - stopów metali z pamięcią kształtu (SMA - NiTi).
-
Hydrogen-enhanced stress corrosion cracking in low alloy steels in seawater
PublicationBadano podatność stali niskostopowych w wodzie morskiej w warunkach polaryzacji katodowej. Stwierdzono spadek czasu do zniszczenia, energii zniszczenia i przewężenia ze wzrostem potencjału katodowego. Wykazano znaczącą korelację między stopniem degradacji wodorowej a stężeniem wodoru dyfuzyjnego.
-
Weldability of S460ML High Strength Low Alloy Steel in Underwater Conditions
PublicationThe paper presents experimental evaluation of susceptibility of the high strength S460ML steel to cold cracking in the conditions of wet welding with the use of covered electrodes. From the results of Tekken tests it was found out that the investigated steel was characterised, in the conditions of the carried out experiments (underwater wet welding and air welding with rutile electrodes), of high susceptibility to cold cracking....
-
Comparison of Properties of the Hybrid and Bilayer MWCNTs—Hydroxyapatite Coatings on Ti Alloy
PublicationCarbon nanotubes are proposed for reinforcement of the hydroxyapatite coatings to improve their adhesion, resistance to mechanical loads, biocompatibility, bioactivity, corrosion resistance, and antibacterial protection. So far, research has shown that all these properties are highly susceptible to the composition and microstructure of coatings. The present research is aimed at studies of multi-wall carbon nanotubes in three different...
-
Application of multisine nanoscale impedance microscopy to heterogeneous alloy surface investigations
PublicationIn the recent years atomic force microscopy is recognized as valuable tool for investigation of surficial features of construction materials. It concerns, among other things, studies of changes caused by such phenomena as galvanic corrosion, passivation associated with the growth of oxide layers, or sensitization of austenitic steels with the formation of carbide phases. In addition, atomic forcemicroscopy allows easy coupling...
-
Near Boundary Acoustic Streaming in Ni-Fe alloy electrodeposition control
PublicationSilny wpływ na osadzanie elektrochemiczne stopów metali mają zjawiska występujące w warstwie dyfuzyjnej, modyfikujące rozkład koncentracji jonów w odmienny sposób dla każdego ze składników. Artykuł przedstawia metodę pobudzania akustycznego prowadzącą do kontrolowanego, jednorodnego osadzania stopów. Metoda ta polega na generowaniu prze-pływu akustycznego prostopadle do powierzchni osadzania, w polu stojącej fali akustycznej równoległej...
-
Surface structure and propoerties of Ti6Al4V alloy laser melted at cryogenic conditions
PublicationPrzedstwiono wyniki badań mikroskopowych i mikrotwardości warstwy wierzchniej poddanej przetapianiu laserem w ciekłym aocie przy mocy laserz 3000-6000 W. Stwierdzono wzrost twardości i utworzenie zróżnicowanej warstwy wierzchniej.
-
Thermal properties of strontium–borate glasses and glass-ceramics containing bismuth and vanadium oxides measured with DSC method
Open Research DataThermal properties of strontium–borate glasses and glass-ceramics containing bismuth and vanadium oxides was measured by DSC.
-
Influence of dispersed phase content on the mechanical properties of electroless nanocomposite Ni-P/Si3N4 and hybrid Ni-P/Si3N4/graphite layers deposited on the AW-7075 alloy.
PublicationThe article presents the results of mechanical testing of Ni-P/Si3N4 nanocomposite and hybrid Ni-P/Si3N4/graphite coatings deposited on AW-7075 aluminum alloy using the chemical reduction method. In terms of mechanical testing, microhardness was measured, and surface roughness and adhesion of the coatings to the aluminum substrate were determined using the “scratch test” method. The surface morphology of the deposited layers was...
-
Effects of FSW Tool Plunge Depth on Properties of an Al-Mg-Si Alloy T-Joint: Thermomechanical Modeling and Experimental Evaluation
PublicationOne of the main challenging issues in friction stir welding (FSW) of stiffened structures is maximizing skin and flange mixing. Among the various parameters in FSW that can affect the quality of mixing between skin and flange is tool plunge depth (TPD). In this research, the effects of TPD during FSW of an Al-Mg-Si alloy T-joint are investigated. The computational fluid dynamics (CFD) method can help understand TPD effects on FSW...
-
Osteoblast and bacterial cell response on RGD peptide‐functionalized chitosan coatings electrophoretically deposited from different suspensions on Ti13Nb13Zr alloy
PublicationMetallic materials for long-term load-bearing implants still do not provide high antimicrobial activity while maintaining strong compatibility with bone cells. This study aimed to modify the surface of Ti13Nb13Zr alloy by electrophoretic deposition of a chitosan coating with a covalently attached Arg-Gly-Asp (RGD) peptide. The suspensions for coating deposition were prepared in two different ways either using hydroxyacetic acid...
-
THE ANALYSIS OF THE INFLUENCE OF STRESS DISTRIBUTION ON WEAR PROFILE IN LUBRICATED SLIDING CONTACT OF UHMW-PE VS TITANIUM Ti-13Nb-13Zr ALLOY
PublicationMetal – polymer sliding contacts are a typical combination in industry and medicine. For decades such a set of materials has been the primary choice in human joints endoprosthetic technology. In this paper tribological issues of are presented from a research on the potential for practical use of Ti-13Nb-13Zr/UHMW-PE couple for orthopedic endoprosthesis. In tests on simplified models it is critically important to carefully...
-
Correlation between partial inhibition of hydrogen evolution using thiourea and catalytic activity of AB5-type hydrogen storage alloy towards borohydride electrooxidation
PublicationDirect borohydride fuel cells (DBFCs) are devices which directly convert the chemical energy stored in the borohydride ion and oxidant into electrical energy as a result of redox reactions. Unfortunately, a significant amount of fuel is lost as a result of the undesirable hydrolysis reaction. The selection of an efficient borohydride hydrolysis inhibitor requires detailed knowledge regarding the interaction mechanism between the...
-
Artificial neural network based fatigue life assessment of friction stir welding AA2024-T351 aluminum alloy and multi-objective optimization of welding parameters
PublicationIn this paper, the fracture behavior and fatigue crack growth rate of the 2024-T351 aluminum alloy has been investigated. At first, the 2024-T351 aluminum alloys have been welded using friction stir welding procedure and the fracture toughness and fatigue crack growth rate of the CT specimens have been studied experimentally based on ASTM standards. After that, in order to predict fatigue crack growth rate and fracture toughness,...
-
Structure and optical measurements of Eu doped tellurium oxide thin films
Open Research DataThin films were deposited by magnetron sputtering method and simultaneously heated at 200 oC. Presence of Eu ions and their valence states was confirmed by X-ray photoemission spectroscopy measurements. The structure of the films as well as the influence of europium dopant on crystalline structure of the films was examined by X-ray diffraction method. ...
-
The topography of strontium–borate glasses and glass-ceramics containing bismuth and vanadium oxides measured with SEM method
Open Research DataThe topography of strontium–borate glasses and glass-ceramics containing bismuth and vanadium oxides was measured by SEM.
-
Structure and Mechanical Properties of Composite Layers Prepared by Laser Alloying of Aluminium Alloy
Publication -
Surface Characteristics of Plasma Treated and Titanium Nitride (TiN) Deposited Aluminum Alloy
Publication -
The Biocompatibility and Self-Healing Effect of a Biopolymer’s Coating on Zn Alloy for Biomedical Applications
Publication -
Influence of Laser Treatment on Microstructure of Surface Layer of the Ti-6Al-4V Alloy
PublicationPrzedstawiono mikrostrukturę powierzchni, przekroju i przełomu warstwy wierzchniej stopu Ti-6Al-4V uzyskanej po nadtapianiu laserem w różnym środowisku. Stwierdzono wzrost mikrotwardości stopu w warstwie nadtopionej, rozdrobnienie ziarna, a także tworzenie azotków tytanu i mikropęknięć skutkiem obecności znacznych naprężeń własnych. Grubość wytworzonych warstw osiągała wartość 1,5 mm.
-
Ultrafine grained Mg-1Zn-1Mn-0.3Zr alloy and its corrosion behaviour
Publication -
The possibility of an use of laser treatment to improve the behaviour of the Ti-6Al-4V alloy
PublicationPrezentowana praca miała na celu stworzenie warunków ultraszybkiego chłodzenia przetopionej warstwy w obecności azotu tak, aby otrzymać twardą i gruba warstwę wierzchnią na stopie Ti-6Al-4V , najczęściej używanm stopie Ti, zawierającą struktury martenzytu i azotku tytanu.
-
Corrosion characteristics of the AL-Si alloy after laser treatment at cryogenic conditions
PublicationOmówiono wpływ laserowego powierzchniowego przetapiania stopu Al-Si w warunkach kriogenicznych na jego mikrostrukturę i właściwości użytkowe. W wyniku badań korozyjnych stwierdzono zwiększenie odporności na korozję stopu Al-Siw 0,01 M roztworze H2SO4.
-
Laser assisted forming of the surface layer of Al-Si alloy at cryogenic conditions.
PublicationW artykule przedstawiono wpływ powierzchniowego laserowego przetapiania w warunkach kriogenicznych na mikrostrukturę, mikrotwardość i własności korozyjne stopu AlSi13Mg1CuNi. Stwierdzono korzystny wpływ obróbki laserowej na mikrostrukturę, mikrotwardość i odporność na zużycie ścierne badanego stopu aluminium.
-
Effect of Arc Strikes on High Strength Low Alloy Steels Welded by SMAW
PublicationWet welding with covered electrodes (Shielded Metal Arc Welding – SMAW) is the most commonly used method of carrying out welding repair works in a water environment. Limited visibility and the inability to move freely under water result in an increased risk of formation of welding imperfections such as lack of fusion, lack of penetration and arc strikes. The work focused on changes in the properties and structure of steel subjected...
-
Magneto-mechanical properties evolution of Fe-C alloy during precipitation process.
PublicationZbadano pętlę histerezy magnetycznej oraz natężenia mechanicznego i polowego efektu Barkhausena w stopie Fe-C w funkcji czasu wygrzewania izotermicznego w temperaturze 473 K. Wyznaczono rozkłady poziomu naprężeń wewnętrznych oraz straty energii na procesy histerezowe. Wykazano, iż pole koercji Hc jest paraboliczną funkcją średniego poziomu naprężeń sigma-i.
-
Influence of yttria surface modification on high temperature corrosion of porous Ni22Cr alloy
PublicationProtective coatings for porous alloys for high temperature use are relatively new materials. Their main drawback is high temperature corrosion. In this work protective coatings based the on Y-precursor infiltrated into the sintered Ni22Cr alloys are studied at 700°C. Effects of the amount of the protective phase on the resulting corrosion properties are evaluated in air and humidified hydrogen. Weight gain of the samples, their...
-
ESTIMATION OF YOUNG`S MODULUS OF THE POROUS TITANIUM ALLOY WITH THE USE OF FEM PACKAGE
PublicationPorous structures made of metal or biopolymers with a structure similar in shape and mechanical properties to human bone can easily be produced by stereolithographic techniques, e.g. selective laser melting (SLM). Numerical methods, like Finite Element Method (FEM) have great potential in testing new scaffold designs, according to their mechanical properties before manufacturing, i.e. strength or stiffness. An example of such designs...
-
The determinants of morphology and properties of the nanohydroxyapatite coating deposited on the Ti13Zr13Nb alloy by electrophoretic techniqe
PublicationThe titanium and its alloys belong at present to the most preferred and commonly applied biomaterials for load- bearing implants. The surfaces of biomaterials are subjected to modification, including the hydroxyapatite coatings deposited in order to ensure corrosion resistance and better joining between an implant and a bone through the possibility of ingrowth bone into the coating. In this paper, the morphology and properties...
-
Effects of loading pattern and lubricant pressure influence on bearing alloy fatigue characteristics
PublicationOpisano wyniki testów zmęczeniowych przeprowadzonych dla stopu łożyskowego AlSn (11,3 Cu 1,2) osadzonego na taśmie stalowej. Doświadczalnie określono wartości obciążeń niszczących dla różnych warunków obciążenia: dla obciążeń zginających wahadłowych, dla obciążeń zginających wahadłowych przy równoczesnym działaniu słabego lub zmiennego ciśnienia w komorze olejowej.
-
Effect of plasma nitrided layers on low-alloy steel on its hydrogen degradation
PublicationPrzedstawiono badania wpływu warstw azotowanych jarzeniowo na stali 34CrAlNi7-10 na jej podatność na niszczenie wodorowe. Wytworzono warstwy azotowane w atmosferach technologicznych o różnym udziale wodoru. Próbki materiału rodzimego i z warstwami azotowanymi poddano próbie rozciągania z małą prędkością odkształcania w środowisku 0,01 N kwasu siarkowego przy polaryzcaji katodowej. Względny spadek plastyczności i charakter przełomu...
-
Investigation of Mechanical and Microstructural Properties of Welded Specimens of AA6061-T6 Alloy with Friction Stir Welding and Parallel Friction Stir Welding Methods
PublicationThe present study investigates the effect of two parameters of process type and tool offset on tensile, microhardness, and microstructure properties of AA6061-T6 aluminum alloy joints. Three methods of Friction Stir Welding (FSW), Advancing Parallel-Friction Stir Welding (AP-FSW), and Retreating Parallel-Friction Stir Welding (RP-FSW) were used. In addition, four modes of 0.5, 1, 1.5, and 2 mm of tool offset were used in two welding...
-
Lead-free bismuth-based perovskites coupled with g–C3N4: A machine learning based novel approach for visible light induced degradation of pollutants
PublicationThe use of metal halide perovskites in photocatalytic processes has been attempted because of their unique optical properties. In this work, for the first time, Pb-free Bi-based perovskites of the Cs3Bi2X9 type (X = Cl, Br, I, Cl/Br, Cl/I, Br/I) were synthesized and subjected to comprehensive morphological, structural, and surface analyses, and photocatalytic properties in the phenol degradation reaction were examined. Furthermore,...
-
The structure of strontium–borate glasses and glass-ceramics containing bismuth and vanadium oxides measured with X-ray diffraction method
Open Research DataThe structure of strontium–borate glasses and glass-ceramics containing bismuth and vanadium oxides was measured by XRD.
-
Chemical composition of tellurium oxides thin films deposited by magnetron sputtering method
Open Research DataThin films were prepared by radio frequency reactive magnetron sputtering technique. Metallic Te target was sputtered for about 45 min in argon-oxygen atmosphere what resulted in 300 nm film thickness deposition. The pressure in the chamber was below 0.2 Pa and substrate was heated at 200 °C. The distance between sputtered target and the Corning 1737...
-
Influence of Two-Stage Anodization on Properties of the Oxide Coatings on the Ti–13Nb–13Zr Alloy
PublicationThe increasing demand for titanium and its alloys used for implants results in need of such innovative surface treatment that may jointly increase corrosion resistance and biocompatibility, and demonstrate antibacterial protection at no cytotoxicity. The purpose of this research was to characterize the effect of two-stage anodization, performed for 30 min in phosphoric acid, at the presence of hydrofluoric acid in the second stage....
-
Studying the Effect of Working Conditions on WEDM Machining Performance of Super Alloy Inconel 617
PublicationWire electrical discharge machining (WEDM) has been for many years a precise and efficient non-conventional manufacturing solution in various industrial applications, mostly involving the use of hard-to machine materials like, among other, the Inconel super alloys. The focus of the present study is on exploring the effect of selected control parameters, including pulse duration, pulse-off time and the dielectric flow pressure on...
-
Surface topography analysis based on fatigue fractures obtained with bending of the 2017A-T4 alloy
Publication