Zobrazeno 1 - 10
of 51
pro vyhledávání: '"Theophilo Moura Maciel"'
Autor:
Mathews Lima dos Santos, Arthur Filgueira de Almeida, Guilherme Gadelha de Sousa Figueiredo, Marcos Mesquita da Silva, Theophilo Moura Maciel, Tiago Felipe Abreu Santos, Renato Alexandre Costa de Santana
Publikováno v:
Metals, Vol 14, Iss 10, p 1154 (2024)
The influence of the centerline segregation region (CSR) on the hydrogen embrittlement (HE) of two different API 5L X80 pipeline steel plates was investigated. The novelty of this work was to establish relationships between the CSR, microstructure, a
Externí odkaz:
https://doaj.org/article/491fe45b8b6f4b8bac75452ccb4d485e
Autor:
Jefferson Segundo de Lima, Oclávio Coutinho dos Santos, Antônio Almeida Silva, Raphael Henrique Falcão de Melo, Theophilo Moura Maciel
Publikováno v:
Materials Research, Vol 25 (2022)
Abstract Aluminum alloys of 7xxx series have excellent characteristics and mechanical properties, being widely used in primary aircraft structures. However, the welding of these alloys by conventional arc welding processes results in an excessive mec
Externí odkaz:
https://doaj.org/article/65d26e15e3414efe9624b1624f4ec89a
Autor:
Adiana Nascimento Silva, Esdras Carvalho Costa, José Gonçalves de Almeida, Theophilo Moura Maciel, Danielle Guedes de Lima Cavalcante, Tibério Andrade dos Passos
Publikováno v:
Materials Research, Vol 25 (2022)
Abstract ASTM A 182 F22 steel, used in components subsea for oil extraction, are previously buttered with ductile metal such as Inconel 625, before being welded to steel pipes similar to ASTM A36 steels. The thermal buttering weld cycle provides the
Externí odkaz:
https://doaj.org/article/a07f14393a7f4cbe94a242c3335e8dd4
Autor:
Marcos Mesquita da Silva, Gabrielly Santana Cardoso, Theophilo Moura Maciel, Marco Antonio dos Santos, Renato Alexandre Costa de Santana, Valmir Rodrigues Batista
Publikováno v:
Revista Principia, Vol 1, Iss 43, Pp 212-221 (2018)
The aim of this study was to evaluate different weld coatings of Ni alloy applied by the process of submerged arc welding (SAW) on API 5L Gr B steel used in the Oil and Gas Sector. The weldings were made with an AWS ERNiCrMo-4 filler metal of 1,14mm-
Externí odkaz:
https://doaj.org/article/d96df89e54c349aaa4f8ef70c51355eb
Autor:
Aníbal Veras Siqueira Filho, Tiago Leite Rolim, Yogendra Prasad Yadava, Francisco Ilo Bezerra Cardoso, Pablo Batista Guimarães, Theophilo Moura Maciel, Ricardo Artur Sanguinetti Ferreira
Publikováno v:
Materials Research, Vol 16, Iss 2, Pp 322-326 (2013)
Residual stresses in a welded joint of ASTM A131 grade AH32 steel was measured either by the X-ray diffraction or by displacements of referenced points measured on a coordinate measuring machine before and after heat treatment. For all tests, the wel
Externí odkaz:
https://doaj.org/article/64b1715ab1aa409484e959d847d8d5fb
Autor:
Mary Roberta Meira Marinho, Theophilo Moura Maciel, Walman Benício Castro, Edalmy Oliveira Almeida, Clodomiro Alves Jr
Publikováno v:
Materials Research, Vol 12, Iss 4, Pp 419-422 (2009)
Thin films of titanium were deposited onto Al2O3 substrate by hollow cathode discharge method for the formation of a ceramic-ceramic joint using indirect brazing method. An advantage of using this technique is that a relatively small amount of titani
Externí odkaz:
https://doaj.org/article/8933779ca6b94bc7a9e73e925759958d
Publikováno v:
Materials Science Forum. 1012:349-353
The demand for lighter materials with suitable mechanical properties and a high resistance to corrosion has been increasing in the industries. Therefore, aluminum appears as an alternative due to its set of properties. The aim of this work was to eva
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::052e290e49f9332d1d2d3dcdb78b5248
https://doi.org/10.4028/www.scientific.net/msf.1012.349
https://doi.org/10.4028/www.scientific.net/msf.1012.349
Autor:
Igor Jaloto de Lima, Beatriz Cândida de Farias Ferreira, Aureliano Xavier dos Santos, Theophilo Moura Maciel, Renato Alexandre Costa de Santana
Publikováno v:
Matéria (Rio de Janeiro), Volume: 27, Issue: 2, Article number: e13171, Published: 09 DEC 2022
Matéria (Rio de Janeiro) v.27 n.2 2022
Matéria (Rio de Janeiro. Online)
instacron:RLAM
Matéria (Rio de Janeiro) v.27 n.2 2022
Matéria (Rio de Janeiro. Online)
instacron:RLAM
Annually, high investments are made in the maintenance of pipelines used in the oil industry around the globe. Thus, solutions are sought that combine low cost, reproducibility and properties that are consistent, mainly against corrosion. One of thes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::21bbb874713ec3f8966e6a2d54d82894
https://doi.org/10.1590/s1517-707620220002.1371
https://doi.org/10.1590/s1517-707620220002.1371
Publikováno v:
Matéria (Rio de Janeiro), Volume: 27, Issue: 2, Article number: e13225, Published: 16 JAN 2023
RESUMO Um defeito típico recorrente nas uniões soldadas, proveniente das condições climáticas como o vento e a umidade, é a presença de porosidades no cordão de solda. E, dependendo da severidade deste fator, poderá provocar a sua falha dian
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a6669707a22853cee8542902761ac0ed
https://doi.org/10.1590/s1517-707620220002.1325
https://doi.org/10.1590/s1517-707620220002.1325
Autor:
Raphael Henrique Falcão de Melo, C.J. de Araújo, Theophilo Moura Maciel, Matheus José Cunha de Oliveira
Publikováno v:
Materials Chemistry and Physics. 224:137-147
In this work, the microstructure and mechanical behaviour of dissimilar nickel-titanium (NiTi) shape memory alloy (SMA) and AISI 304 stainless steel (SS) thin sheets welded by micro gas tungsten arc welding (GTAW) using NiTi and Inconel 625 as filler
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e4040fe64f4d2c8134b9fbe04b937771
https://doi.org/10.1016/j.matchemphys.2018.12.013
https://doi.org/10.1016/j.matchemphys.2018.12.013