Zobrazeno 1 - 10
of 67
pro vyhledávání: '"Otávio L. Rocha"'
Autor:
Fabrício A. Souza, Marlo O. Costa, Igor A. Magno, Jacson M. Nascimento, Adrina P. Silva, Thiago S. Costa, Otávio L. Rocha
Publikováno v:
Journal of Materials Research and Technology, Vol 8, Iss 5, Pp 5046-5052 (2019)
In this investigation, in order to evaluate the influence of microstructures on the microhardness of an aluminum-based multicomponent alloy, samples of the horizontally solidified Al-7 wt.%Si-3 wt.%Cu alloy were subjected to the T6 heat treatment. Mi
Externí odkaz:
https://doaj.org/article/a8a590f7a8bb4a6ab62b61234423271c
Autor:
ANGELA J. VASCONCELOS, RAFAEL H. KIKUCHI, ANDRÉ S. BARROS, THIAGO A. COSTA, MARCELINO DIAS, ANTONIO L. MOREIRA, ADRINA P. SILVA, OTÁVIO L. ROCHA
Publikováno v:
Anais da Academia Brasileira de Ciências, Vol 88, Iss 2, Pp 1099-1111 (2016)
An experimental study has been carried out to evaluate the microstructural and microhardness evolution on the directionally solidified binary Al-Cu and multicomponent Al-Cu-Si alloys and the influence of Si alloying. For this purpose specimens of Al-
Externí odkaz:
https://doaj.org/article/dc672b408ee74e6dbf4c1bfdb84796a2
Autor:
Cássio A. P. Silva, Layo R. M. Leal, Emanuelle C. Guimarães, Paulo M. Júnior, Antonio L. Moreira, Otávio L. Rocha, Adrina P. Silva
Publikováno v:
Advances in Materials Science and Engineering, Vol 2018 (2018)
This study aims to correlate the influence of thermal and microstructural parameters such as growth rate and cooling rate (VL and TR) and secondary dendrite spacing (λ2), respectively, in the machining cutting temperature and tool wear on the neckin
Externí odkaz:
https://doaj.org/article/082bea3825c145c0ab60ecfd15159635
Autor:
Diego B. Carvalho, Antonio L. Moreira, Daniel J. Moutinho, José M. Filho, Otávio L. Rocha, José E. Spinelli
Publikováno v:
Materials Research, Vol 17, Iss 2, Pp 498-510 (2014)
Experiments were conducted to investigate the influence of thermal parameters on the columnar to equiaxed transition during the horizontal unsteady-state directional solidification of Al-Si alloys. The parameters analyzed include the heat transfer co
Externí odkaz:
https://doaj.org/article/0e4b684179234317a1451c1872355584
Publikováno v:
JOM. 74:2437-2449
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5e5f3ad5a407436c9ad9c202d5f7d3af
https://doi.org/10.1007/s11837-022-05271-7
https://doi.org/10.1007/s11837-022-05271-7
Autor:
Antonio Luciano Seabra Moreira, José C. Filho, Teyla C. Silva, Otávio L. Rocha, Carolina R. Barbosa, André dos Santos Barros
Publikováno v:
International Journal of Metalcasting. 16:1191-1205
Potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and microstructure characterization were performed on directionally solidified samples of the Al–3Cu–2Si alloy in order to study their corrosion behavior in a 0.2 M HCl e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c778e6f0a17a859d57f387a19deb293a
https://doi.org/10.1007/s40962-021-00657-w
https://doi.org/10.1007/s40962-021-00657-w
Autor:
Hugo M. Azevedo, Otávio L. Rocha, José C. Filho, Carolina R. Barbosa, Antonio Luciano Seabra Moreira, Teyla C. Silva
Publikováno v:
International Journal of Metalcasting. 16:191-203
Electrochemical corrosion tests were performed on samples of horizontally solidified Al7Si0.3Mg (wt%) alloy. The investigated solidification and corrosion parameters were growth and cooling rates (VL and TR, respectively), secondary dendritic spacing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6bf41f16c3ba1043e0304932460ea2d3
https://doi.org/10.1007/s40962-021-00571-1
https://doi.org/10.1007/s40962-021-00571-1
Autor:
Hugo M. Azevedo, Otávio L. Rocha, Marlo O. Costa, Carolina R. Barbosa, A Moreira, Fernando S. Rocha, Gabriel H. Machado
Publikováno v:
Journal of Thermal Analysis and Calorimetry. 146:2059-2071
A transient horizontal solidification experiment was performed to investigate the role of the thermal parameters, such as growth and cooling rates (GR and CR, respectively), on the microstructure and microhardness (HV) of the Al2Si3Cu (mass%) alloy.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0199a3998c353dd22b4aad05b9682dff
https://doi.org/10.1007/s10973-020-10419-1
https://doi.org/10.1007/s10973-020-10419-1
Solidification thermal parameters, microstructural evolution and dendritic growth in an AlCuNi alloy
Autor:
Otávio L. Rocha, Luiz G. Nascimento, Edinaldo G. Correa, Evandro S. Militão, Ivaldo L. Ferreira
Publikováno v:
Philosophical Magazine Letters. 101:21-29
Unsteady-state upward solidification experiment was carried out with the Al-3Cu-3Ni (wt.%) alloy. Temperature profiles were obtained through a water-cooled directional solidification device. Analys...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::181a9515e9135f2ede3716a1a39b5e42
https://doi.org/10.1080/09500839.2020.1837980
https://doi.org/10.1080/09500839.2020.1837980
Autor:
Thiago A. Costa, Ailton Gualdez de Oliveira, Otávio L. Rocha, Ivaldo L. Ferreira, Thiago G. Costa, Fernando S. Rocha
Publikováno v:
Philosophical Magazine. 100:2659-2676
In this work, a theoretical and experimental study has been carried out with the eutectic Al12.6Si alloy (wt.%) in order to determine and evaluate the transient heat flow parameters, such as metal/...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e6a5b4b9b65fe6db53682fe83aa9204e
https://doi.org/10.1080/14786435.2020.1785646
https://doi.org/10.1080/14786435.2020.1785646