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    Tytuł:
    Morphology and Hardness of Electrochemically-Codeposited Ti-Dispersed Ni-Matrix Composite Coatings
    Morfologia i twardość elektrochemicznie współosadzonych powłok kompozytowych Ni-Ti
    Autorzy:
    Srikomol, S.
    Janetaisong, P.
    Boonyongmaneerat, Y.
    Techapiesancharoenkij, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/353298.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    electrochemical codeposition
    composite coatings
    Nickel-Titanium
    morphology
    hardness
    współosadzanie elektrochemiczne
    powłoki kompozytowe
    powłoki Ni-Ti
    morfologia
    twardość
    Opis:
    The effects of current density and Ti particle loading in a plating bath on the morphology and hardness of Ni-Ti composite coatings via an electrochemical-codeposition process were investigated. The Ti-reinforced Ni-matrix composite coatings were codeposited on copper substrates using a Ni-ion electrolytic solution stably suspended with -45 micron Ti particles. Within the current studied range, the coatings’ Ti contents are in the range between 46 and 62 at.%. The morphology appeared to vary with current density. Structures of the Ni-Ti composite coatings produced under low current density conditions revealed denser structures, which is in contrast to the more porous structures noted in the coatings produced under high current density. An initial increase of current density from 100 to 150 mA/cm2 also tends to raise Ti coating content. The reinforcement of Ti particles in the coatings also increased their hardness, which is attributed to the possible role of the embedded Ti particles in hindering matrix deformation. The effect of Ti loading on the coating’s Ti contents was not significant under conditions used in the present study.
    Badano wpływ gęstości prądu i zawartości cząstek Ti w kąpieli galwanicznej na morfologię i twardość elektrochemicznie współosadzanych powłok kompozytowych Ni-Ti. Kompozytowe powłoki niklowe zbrojone cząstkami Ti zostały współosadzone na powierzchniach miedzianych z kąpieli elektrolitycznej zawierającej jony Ni i 45 mikronowe cząstki Ti tworzące stabilną zawiesinę. Zawartość Ti wbudowanego w powłoki wahała się w granicach 46-62 at.%. Morfologia powłok zmienia sie wraz ze zmianą stosowanej gęstości prądu. W przypadku kompozytowych powłok Ni-Ti wytwarzanych przy niskich gęstościach prądu stwierdzono bardziej zwarte struktury, w przeciwienstwie do bardziej porowatych struktur stwierdzonych w przypadku powłok wytwarzanych przy wysokich gęstościach prądu. Początkowy wzrost gęstości prądu od 100 do 150 mA/cm2 równiez powoduje podniesienie zawartości Ti w powłokach. Ze wzrostem zawartości Ti wzrasta również twardość powłoki, co można przypisać roli osadzonych cząstek Ti utrudniających odkształcenie osnowy. W warunkach stosowanych w tej pracy wpływ zawartości Ti w kąpieli na zawartość Ti w powłokach nie był znaczący.
    Źródło:
    Archives of Metallurgy and Materials; 2014, 59, 4; 1287-1292
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Review of new developments in machining of aerospace materials
    Autorzy:
    Jemielniak, Krzysztof
    Powiązania:
    https://bibliotekanauki.pl/articles/1428707.pdf
    Data publikacji:
    2021
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    machining
    aerospace materials
    nickel alloy
    titanium alloy
    composite
    Opis:
    The paper presents an update of the recent literature on advances in machining of difficult to machine materials such as nickel and titanium-based alloys, and composites used in aeroengine and aerostructure applications. The review covers the following issues: advances in high-performance cooling techniques as cryogenic machining, minimum quantity lubrication, the combination of MQL and cryogenic cooling, and high-pressure lubricoolant supply and hybrid cutting processes – vibration assisted machining (both low and high frequency), laser, plasma and EDM assisted machining. Examples of applications in industrial processes are also given.
    Źródło:
    Journal of Machine Engineering; 2021, 21, 1; 22-55
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Estimation tool for optimum cutting condition of difficult to cut materials
    Autorzy:
    Soe, Y. H.
    Tanabe, I.
    Iyama, T.
    Da Cruz, J. R.
    Powiązania:
    https://bibliotekanauki.pl/articles/99777.pdf
    Data publikacji:
    2012
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    titanium alloy
    nickel alloy
    cutting machining and calculation model
    Opis:
    Titanium alloy and nickel alloy are mainly used for several aeronautical parts due to their high strength and durability at high temperature. However, thermal conductivity of these materials are very low and most of the heat generated during cutting are concentrately conducted into the cutting tool. Therefore, the tool become extremely high temperature resulting shorter tool life. In this paper, a method for calculating the optimum cutting condition for cutting low thermal conductivity materials such as titanium alloy and nickel alloy is developed and evaluated. The temperatures on the cutting tool tip for various combination of tools and work piece materials were calculated by dynamic FEM simulation and the estimation tool for optimum cutting condition is created based on these results. The amount of heat flow and the temperature on the cutting tool were calculated based on cutting theory. Then, optimum cutting conditions for those materials were estimated by newly developed program. The method was finally evaluated by several experiments. It is concluded from the results that (1) The developed program is applicable for estimation of optimum cutting conditions regarding titanium alloy and nickel alloy. (2) Titanium alloy (Ti6Al4V) can be machined with longer tool life using estimated optimum cutting condition.
    Źródło:
    Journal of Machine Engineering; 2012, 12, 1; 76-88
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Control of tool temperature using neural network for machining materials with low thermal conductivity
    Autorzy:
    Soe, Y. H.
    Tanabe, I.
    Iyama, T.
    Abe, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/99454.pdf
    Data publikacji:
    2010
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    titanium alloy
    nickel alloy
    neural network
    tool
    tool temperature
    Opis:
    Recently titanium and nickel alloys have become pre-eminent for aeronautic and astronautic parts. Since these cutting and becomes severely demaged. It is important to control cutting tool temperature. In this paper,the control system of tool tip temperature using inverse analysis of neural network for machining these materials was developed and evaluated. The neural network between cutting conditions and tool temperature was firstly created by a set of teaching data. Then, a mathematical model using algebra was developed. Cutting speed was selected as parameter to be controlled in reducing tool temperature. The relationship between the optimum cutting speed and cutting time was calculated with the inverse analysis of neural network by pre-reading of NC program before cutting. The tool temperature can be maintained at the desired value. The developed system is evaluated by the expaeriments using the turning process and workpiece of Ti6Al4V. From the results, it is concluded that; (1) Tool tip temperature can be controlled by using the proposed inverse analysis of the neural network, (2) CThe cutting tool life can be maintained by this method, for cutting materials with low thermal conductivity.
    Źródło:
    Journal of Machine Engineering; 2010, 10, 3; 78-89
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on the properties of Co-TiC and Ni-TiC HiP-sintered alloys
    Autorzy:
    Cherepova, Tetiana
    Dmitrieva, Galyna
    Tisov, Oleksandr
    Dukhota, Oleksandr
    Kindrachuk, Myroslav
    Powiązania:
    https://bibliotekanauki.pl/articles/970620.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    cobalt
    nickel
    titanium carbide
    sintered alloys
    heat resistance
    wear resistance
    melting temperature
    Opis:
    Three types of sintered alloys were fabricated based on cobalt, nickel and high-temperature alloy ZhS32-VI matrix with titanium carbide strengthening phase. TiC content was in a range of 30–50 vol. %. The melting temperatures of alloys are higher than 1320°C, and they may undergo undamaged through all technological procedures together with turbine blades, including soldering and outgassing. DSC analyses indicates no additional thermal effects until melting, which confirms their structural stability. The examinations of microstructure revealed three types of constituents – TiC particles, matrix solid solution and blow outs – structural defects having negative effects on all the studied properties. It was found that heat resistance of nickel based sintered alloys at the temperature of 1100°C is superior as compared with the alloys based on cobalt and alloy ZhS32-VI. It has been established that wear resistance in conditions of fretting wear at temperatures of 20, 850, 950 and 1050°C of sintered alloy with ZhS32-VI matrix is mostly superior as compared with the other alloys. The properties of produced alloys allow to use them for manufacturing of components of friction couples operating in conditions of high temperature fretting wear, including protective pads of turbine blades top shrouds contact faces.
    Źródło:
    Acta Mechanica et Automatica; 2019, 13, 1; 57-67
    1898-4088
    2300-5319
    Pojawia się w:
    Acta Mechanica et Automatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative characteristics of endodontic drills
    Autorzy:
    Loska, S.
    Basiaga, M.
    Pochrząst, M.
    Łukomska-Szymańska, M.
    Walke, W.
    Tyrlik-Held, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/307518.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    nikiel
    tytan
    stop
    Ni-Ti
    biomateriały
    endodontic instrument
    rotary instrument
    nickel
    titanium
    alloys
    Mtwo files
    Opis:
    The work concerns the analysis of influence of the wear process of endodontic instruments on the mechanical and physico-chemical properties of the materials from which they are made. A detailed study of the microstructure, mechanical properties and corrosion resistance in the environment simulating work of the tool was conducted. The research was done for the new Mtwo endodontic files and after six times of use. In addition, the observations with a scanning electron microscope in order to reveal possible damage caused by the impact of a corrosive environment were carried out. The results showed that use of the tool by six times revealed damage at the edges of the blades and may cause a lack of continuity of the cutting line resulting in the uneven distribution of the resistive force which acts on the tool during operation.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2015, 17, 3; 75-83
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Laser Welding of TA15 Titanium Alloy and Inconel 718 Dissimilar Metals
    Autorzy:
    An, Qi
    Wu, Dongting
    Liu, Peng
    Zou, Yong
    Powiązania:
    https://bibliotekanauki.pl/articles/2174556.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    TA15 titanium alloy
    Inconel 718 nickel-based alloy
    laser welding
    microstructure
    tensile strength and fracture characteristic
    Opis:
    This paper studied the effect of laser welding technology on dissimilar metal welding joints of TA15 titanium alloy and Inconel 718 nickel-based alloy. The research results indicate that the laser welding of TA15 titanium alloy and Inconel 718 nickel-based alloy directly was difficult to form well, which due to the intermetallic compounds caused the joint brittle. When the pure Cu foil was used as the filling layer, the quality of the welding joints can be improved effectively. The experimental results also indicate that there were brittle intermetallic-compounds in the laser welding seam, and the laser power had an important influence on the performance and mechanical properties of the dissimilar metal joint. The maximum average tensile strength of the welding joint of 2300 W was increased to 252.32 MPa. Scanning electron microscope(SEM) results show that the fracture morphology was river pattern, a typical morphological of cleavage fracture, and the mode was brittle fracture.
    Źródło:
    Archives of Metallurgy and Materials; 2022, 67, 4; 1267--1276
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Changes in Abrasive Wear Resistance During Miller Test of Cr-Ni Cast Steel with Ti Carbides Formed in the Alloy Matrix
    Autorzy:
    Tęcza, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/2126908.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    chromium-nickel cast steel
    microstructure
    titanium carbides
    hardness
    abrasion
    staliwo chromowo-niklowe
    mikrostruktura
    węgliki tytanu
    twardość
    ścieralność
    Opis:
    Austenitic chromium-nickel cast steel is used for the production of machine parts and components operating under corrosive conditions combined with abrasive wear. One of the most popular grades is the GX2CrNi18-9 grade, which is used in many industries, and mainly in the chemical, food and mining industries for tanks, feeders, screws and pumps. To improve the abrasion resistance of chromium-nickel cast steel, primary titanium carbides were produced in the metallurgical process by increasing the carbon content and adding titanium, which after alloy solidification yielded the test castings with the microstructure consisting of an austenitic matrix and primary carbides evenly distributed in this matrix. The measured hardness of the samples in both as-cast conditions and after solution heat treatment was from 300 to 330HV0.02 and was higher by about 40-70 units compared to the reference GX2CrNi18-9 cast steel, which had the hardness of 258HV0.02. The abrasive wear resistance of the tested chromium-nickel cast steel, measured in the Miller test, increased by at least 20% (with the content of 1.3 wt% Ti). Increasing the Ti content in the samples to 5.3 and 6.9 wt% reduced the wear 2.5 times compared to the common GX2CrNi18-9 cast steel.
    Źródło:
    Archives of Foundry Engineering; 2021, 21, 4; 110--115
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A brief overview and metallography for commonly used materials in aero jet engine construction
    Autorzy:
    Belan, J.
    Vasko, A.
    Kucharikova, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/111670.pdf
    Data publikacji:
    2017
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    aluminium alloy
    titanium alloy
    nickel-base alloys
    metallography procedures
    B/W and colour contrast
    stop aluminium
    stop tytanu
    stopy na bazie niklu
    odczynnik trawiący
    Opis:
    Aluminium, titanium, and nickel base alloys are mostly and widely used for aircraft jet engine construction. A proper evaluation of its microstructure is important from working safety point of view. To receive a well prepared sample of microstructure, some important steps have to be undertaken. Except for proper grinding and polishing of a sample, structure developing is a significant step, too. In order to develop microstructure various chemical reagents were used to achieve the best results for microstructure evaluation. The chemical reagents were used according to the previous knowledge and some new ones were also tested. Aluminium AK4-1č, titanium VT – 8, and nickel VŽL – 14 and ŽS6 – U alloys were used as an experimental materials. Alloy AK4-1č is used for fan blade production with working temperatures up to 300°C. It is a forged piece of metal machined down into final shape by five-axe milling machine. Alloy VT – 8 is used for high pressure compressor rotor blade production with working temperatures up to 500°C. Blades are forged as well and finally grinded. Finally nickel base alloys VŽL – 14 and ŽS6 – U are used for turbine blade production with working temperatures up 950°C. Blades for turbine are casted into mould with reducible models.
    Źródło:
    Production Engineering Archives; 2017, 17; 9-14
    2353-5156
    2353-7779
    Pojawia się w:
    Production Engineering Archives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stopy na osnowie fazy międzymetalicznej TiAI I ich obróbka cieplna
    TiAI intermetallic phase based alloys and their heat treatment
    Autorzy:
    Szkliniarz, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/109288.pdf
    Data publikacji:
    2013
    Wydawca:
    AXIS MEDIA
    Tematy:
    faza międzymetaliczna TiAl
    obróbka cieplna
    stopy metali
    stopy tytanu
    nadstopy niklu
    wyżarzanie ujednorodniające
    wyżarzanie zupełne
    wyżarzanie niezupełne
    intermetallic phase TiAl
    heat treatment
    alloys
    titanium alloys
    nickel superalloys
    solution annealing
    annealing
    incomplete annealing
    Opis:
    W artykule w oparciu o najnowsze publikacje źródłowe oraz oryginalne wyniki badań własnych przedstawiono charakterystykę nowej generacji stopów tytanu na osnowie uporządkowanej fazy międzymetalicznej TiAI, konkurencyjnych wobec konwencjonalnych stopów tytanu oraz nadstopów niklu. Przedstawiono najważniejsze właściwości tej grupy stopów oraz wskazano aktualne i możliwe obszary ich zastosowania. Charakteryzując poszczególne etapy rozwoju tych stopów w okresie ostatnich kilkudziesięciu lat, starano się udzielić odpowiedzi na pytania:, jaki jest stan aktualny i perspektywy dla tych stopów, jakie bariery należy pokonać i problemy rozwiązać, aby stały się one zamiennikami drogich i ciężkich nadstopów niklu. Scharakteryzowano także skład chemiczny poszczególnych generacji stopów, ich mikrostrukturę oraz oddziaływanie mikrostruktury na właściwości. Opisując przemiany fazowe występujące podczas nagrzewania i chłodzenia po-kazano możliwości ich wykorzystania do kształtowania mikrostruktury i właściwości w procesach obróbki cieplnej stosowanych na poszczególnych etapach wytwarzania i przetwarzania tych stopów. Szczególną uwagę poświęcono nowej, autorskiej metodzie wieloetapowej obróbki cieplnej prowadzącej do ukształtowania wymaganej mikrostruktury tej grupy stopów, której najważniejszymi etapami są: wyżarzanie ujednorodniające, cykliczna obróbka cieplna, wyżarzanie niezupełne i wyżarzanie zupełne.
    In this paper, based on the latest publications on the source and original results of research presents the characteristics of a new generation of titanium alloys on the base of an ordered TiAl intermetallic phase competing with conventional titanium alloys and nickel superalloys. The paper presents the main characteristics of this group of alloys and identifies current and possible areas of application. In describing the various stages of the development of these alloys in the last few decades, attempts to answer the questions: what is the current status and prospects for these alloys, the barriers to be overcome and problems to solve, so that they become substitutes for expensive and heavy nickel superalloys. Characterized also the chemical composition of each generation alloys, their microstructure and microstructure effect on the properties. Describing the phase transformations that occur during heating and cooling is shown the possibility of their use in the formation of the microstructure and Describing the phase transformations that occur during heating and cooling is shown the possibility of their use in the formation of the microstructure and properties of the thermal treatment applied at the various stages of production and processing of these alloys. Particular attention was paid to the new method, multi-stage proprietary heat treatment leads to the formation of the desired microstructure of the alloy group, whose main steps are: homogenization annealing, cyclic heat treatment, under-annealing and full annealing.
    Źródło:
    Piece Przemysłowe & Kotły; 2013, 9-10; 8-12
    2082-9833
    Pojawia się w:
    Piece Przemysłowe & Kotły
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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