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    Wyświetlanie 1-7 z 7
    Tytuł:
    Focus on development of quality, high pressure die casting process
    Autorzy:
    Peter, I.
    Rosso, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/354404.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    numerical simulations
    die casting
    development of casting technology
    HPDC optimization
    Opis:
    In contemporary high-pressure die casting foundries, the mastery of each sequence in the production cycle is more and more important. In the paper, an example of virtual analysis of gearbox casting from Al alloy will be presented. It includes a large variety of parameters, as follows: choosing of appropriate foundry technology, calculation of computer simulation of casting process which takes into account the filling process of cold chamber and filling of cavity, model description of three phases in high-pressure die casting, flow of molten metal, solidification, formation of stress and deformations. Additionally, the optimization of cooling and heating systems will be compared with calculated volume defects, dimensions of castings and their deformations with experimentally obtained values.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 1; 125-128
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An Experimental Study Of Aluminum Alloy Matrix Composite Reinforced SiC Made By Hot Pressing Method
    Badania kompozytu na osnowie stopu aluminium wzmacnianego SiC otrzymanego metodą prasowania na gorąco
    Autorzy:
    Suśniak, M.
    Karwan-Baczewska, J.
    Dutkiewicz, J.
    Actis Grande, M.
    Rosso, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/355120.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Al/SiC composites
    powder metallurgy
    mechanical alloying
    hot pressing
    kompozyt Al/SiC
    metalurgia proszków
    stopowanie mechaniczne
    prasowanie na gorąco
    Opis:
    The present work investigates the possibility of using powder metallurgy processing for producing a metal matrix composite. Materials were prepared from AlSi5Cu2 chips with reinforcement of 10, 15, 20 wt. % silicon carbide. Aluminum alloy chips were milled with SiC powder in a high-energy ball mill by 40 hours. Mechanical alloying process lead to obtain an uniform distribution of hard SiC particles in the metallic matrix and refine the grain size. The consolidation of composite powders was performed by vacuum hot pressing at 450°C, under pressure of 600 MPa by 10 min. The results shows that the addition of SiC particles has a substantial influence on the microstructure and mechanical properties of composite powder as well as consolidated material. Hot pressing is an effective consolidation method which leads to obtain dense AlSi5Cu2/SiC composite with homogeneous structure and advanced mechanical properties.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 2B; 1523-1527
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure investigation of ball milled composite powder based on AlSi5Cu2 alloy chips modified by SiC particles
    Badania strukturalne mielonego proszku kompozytowego na osnowie wiór stopu aluminium modyfikowanych cząstkami SiC
    Autorzy:
    Suśniak, M.
    Karwan-Baczewska, J.
    Dutkiewicz, J.
    Actis Grande, M.
    Rosso, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/353182.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    AlSiCu alloy chips
    recycling
    powder metallurgy
    mechanical alloying
    Al-SiC composite powder
    wióry stopu aluminium
    recykling
    metalurgia proszków
    synteza mechaniczna
    proszek kompozytowy Al-SiC
    Opis:
    The paper is focused on the processing of aluminum alloy chips using powder metallurgy. Chips obtained from recycled AlSi5Cu2 alloy were ball milled with the addition of silicon carbide powder with an average size of 2μm. Mechanical alloying process was employed to obtain homogeneous composite powder. The effect of processing time (0 - 40h) on the homogeneity of the system was evaluated, as well as a detailed study of the microstructure of AlSi5Cu2 aluminum chips and SiC particles during MA was carried out. Addition of silicon carbide (10, 20wt%) to recycled aluminium chips and application of MA lead to fragmentation of the homogeneous composite powder down to particle size of about 3μm and spheroidization. The addition of hard SiC particles caused reinforcement and reduced the milling time. Higher content of silicon carbide and longer processing time allowed to obtain AlSi5Cu2/SiC powders with microhardness ~500HV0,025. The results of MA were investigated with SEM, EDS, LOM, XRD and showed that relatively homogeneous distribution of SiC reinforcements in the matrix as well as grain refinement of aluminum solid solution down to 50nm can be obtained after 40h of processing.
    W artykule przedstawiono metodę otrzymywania proszku kompozytowego na osnowie wiór stopu aluminium AlSi5Cu2 pochodzących z recyklingu z dodatkiem węglika krzemu (SiC-α, 2μm). Określono wpływ czasu mielenia oraz dodatku SiC na mikrostrukture i właściwości proszku kompozytowego.Dodatek SiC (10, 20%mas) do wiór stopu aluminium i zastosowanie mechanicznej syntezy pozwala na otrzymanie jednorodnego i drobnoziarnistego proszku o wielkości 3μm i kształcie zbliżonym do sferycznego. Dodatek twardych cząstek SiC powoduje umocnienie proszku oraz skrócenie czasu mielenia. Dodatek SiC i zastosowanie 40h mielenia pozwala otrzymać cząstki proszku o mikrotwardości około 500 HV0,025. Badania proszku kompozytowego przeprowadzone na mikroskopie optycznym, SEM oraz TEM potwierdziły jednorodne rozmieszczenie cząstek SiC w osnowie oraz zmniejszenie wielkości ziarna do 50nm po 40 godzinach procesu.
    Źródło:
    Archives of Metallurgy and Materials; 2013, 58, 2; 437-441
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Poor weight control, alcoholic beverage consumption and sudden sleep onset at the wheel among Italian truck drivers: A preliminary pilot study
    Autorzy:
    Rosso, Gian Luca
    Montomoli, Cristina
    Candura, Stefano M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2177436.pdf
    Data publikacji:
    2016-02-04
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    obesity
    fatigue
    road safety
    professional drivers
    alcohol consumption
    truck drivers
    Opis:
    Objectives The aim of this study was to investigate the prevalence of obesity, alcoholic beverage consumption, unhealthy alcohol use and sudden sleep onset at the wheel among Italian truck drivers. In addition to prevalence rates, this study also aimed at investigating potential predictors for sudden-onset sleepiness and obesity. Material and Methods A sample of truck drivers was extracted from the database of the High Risk Professional Driver Study. Data concerning demographics, anthropometry, medical information and working conditions were collected using anonymous questionnaires. Logistic regression analyses were performed to assess the association of the reported body mass index (BMI), alcohol consumption and sudden sleep onset with working conditions and general lifestyle factors. Results Three hundred and thirty-five questionnaires were collected. According to their BMI, 45% of the participants were overweight and 21.4% of them were obese. Twenty-four point two percent declared they drank alcoholic beverages during working hours or work breaks and 21.3% of the drivers had an Alcohol Use Disorders Identyfication Test Consumption (AUDIT C) score ≥ 5 (the threshold value for unhealthy alcohol use). Forty-one point six percent of the interviewees experienced one episode of sudden sleep onset at the wheel per month (5.5% per week and 0.9% daily). Predictive factors for obesity were: length of service (odds ratio (OR) = 1.09, confidence interval (95% CI): 1.04–1.15, p < 0.001) and the AUDIT C total score (OR = 1.34, 95% CI: 1.08–1.66, p = 0.008). Predictive factors for sudden-onset sleepiness at the wheel were: age > 55 years old (OR = 5.22, 95% CI: 1.29–21.1, p = 0.020), driving more than 50 000 km per year (OR = 2.89, 95% CI: 1.37–6.11, p = 0.006) and the Chalder Fatigue Questionnaire (CFQ) score > 11 (adjusted OR = 2.97, 95% CI: 1.22–7.21, p = 0.016). Conclusions This study strongly emphasizes the need for intervention in order to reduce and prevent important risk factors for the sake of road safety and truck drivers’ health.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2016, 29, 3; 405-416
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of the patellar button thickness on the knee flexion after total knee arthroplasty
    Autorzy:
    Rosso, I.
    Surface, C.
    Antonaci, P.
    Surface, F. M.
    Negretto, R. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/949740.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    rzepka
    kąt zgięcia
    osteoartroza
    endoprotezoplastyka całkowita stawu kolanowego
    modelowanie
    osteoarthritis
    total knee arthroplasty
    patellar button
    flexion angle
    modeling
    Opis:
    One of the main problems of knee replacement is the limit of knee flexion. This study focuses on the knee implant and the patellar component currently in use in total knee arthroplasty, analyzing the influence of patellar thickness on the degree of knee flexion following surgery. Methods: A kinematics study was performed to evaluate whether an optimal patellar thickness can be identified, which enables the maximum flexion angle to be achieved. Using TC images, a healthy model was built. On this basis, a model of a knee joint which had undergone total knee arthroplasty using a Legion PS prosthesis was constructed. Initially, the standard thickness of patellar implant (9 mm) was used to build the model; then several different patellar implant thicknesses (in the range of 5–15 mm) were analyzed. Results: The results show a non-linear trend: a button thickness of less than 9 mm does not change the flexion angle, whereas a button thickness of over 9 mm results in a loss of flexion. The flexion loss is significant in the first two additions of thicknesses but negligible in the last ones. Conclusions: In the case studied, flexion reduction is not linearly proportional to the patellar thickness. The outcome of total knee arthroplasty is considered to be satisfactory with the standard patellar button. The results of this study could be used to compare the kinematics with other total prosthesis and patellar implants, and should enable the optimization of the patellar residue bone thickness to obtain deep flexion.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2018, 20, 4; 121-134
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The INSIDE Project: Innovative Solutions for In-Beam Dosimetry in Hadrontherapy
    Autorzy:
    Marafini, M.
    Attili, A.
    Battistoni, G.
    Belcari, N.
    Bisogni, M.
    Camarlinghi, N.
    Cappucci, F.
    Cecchetti, M.
    Cerello, P.
    Ciciriello, F.
    Cirrone, G.
    Coli, S.
    Corsi, F.
    Cuttone, G.
    De Lucia, E.
    Ferretti, S.
    Faccini, R.
    Fiorina, E.
    Frallicciardi, P.
    Giraudo, G.
    Kostara, E.
    Kraan, A.
    Licciulli, F.
    Liu, B.
    Marino, N.
    Marzocca, C.
    Matarrese, G.
    Morone, C.
    Morrocchi, M.
    Muraro, S.
    Patera, V.
    Pennazio, F.
    Peroni, C.
    Piersanti, L.
    Piliero, M.
    Pirrone, G.
    Rivetti, A.
    Romano, F.
    Rosso, V.
    Sala, P.
    Sarti, A.
    Sciubba, A.
    Sportelli, G.
    Voena, C.
    Wheadon, R.
    Del Guerra, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402609.pdf
    Data publikacji:
    2015-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.53.Bn
    87.53.Jw
    87.53.Kn
    87.55.N-
    87.55.ne
    87.57.uq
    Opis:
    The INSIDE project addresses the online dose monitoring in particle therapy issue. The proposed detectors exploit the secondary neutral and charged particles emitted during the treatment by the irradiated volumes. The new detection techniques allow to return and online a measurement of the released dose and the Bragg peak position.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 5; 1465-1467
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Study of Monitoring Performances with the INSIDE System
    Autorzy:
    Pennazio, F.
    Attili, A.
    Battistoni, G.
    Belcari, N.
    Bisogni, M.
    Camarlinghi, N.
    Cappucci, F.
    Cecchetti, M.
    Cerello, P.
    Ciciriello, F.
    Cirrone, G.
    Coli, S.
    Corsi, F.
    Cuttone, G.
    De Lucia, E.
    Ferretti, S.
    Faccini, R.
    Fiorina, E.
    Frallicciardi, P.
    Giraudo, G.
    Kostara, E.
    Kraan, A.
    Licciulli, F.
    Liu, B.
    Marafini, M.
    Marino, N.
    Marzocca, C.
    Matarrese, G.
    Morone, C.
    Morrocchi, M.
    Muraro, S.
    Patera, V.
    Peroni, C.
    Piersanti, L.
    Piliero, M.
    Pirrone, G.
    Rivetti, A.
    Romano, F.
    Rosso, V.
    Sala, P.
    Sarti, A.
    Sciubba, A.
    Sportelli, G.
    Voena, C.
    Wheadon, R.
    Del Guerra, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402611.pdf
    Data publikacji:
    2015-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.53.Bn
    87.53.Jw
    87.53.Kn
    87.55.N-
    87.55.ne
    87.57.uq
    Opis:
    The INSIDE collaboration aims to build an on-line hadrontherapy monitoring system, based on a dual-head in-beam PET scanner and a secondary charged particles profiler. In this work preliminary experimental results are presented. The validation of the FLUKA-based Monte Carlo simulation tool is shown together with the expected scanner performances.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 5; 1468-1470
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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