Zobrazeno 1 - 8
of 8
pro vyhledávání: '"Theóphilo Moura Maciel"'
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:
Matheus José Cunha de Oliveira, Raphael Henrique Falcão de Melo, Theóphilo Moura Maciel, Carlos José de Araújo
Publikováno v:
Materials Research, Vol 22, Iss 1 (2018)
The objective of the present work was to evaluate welding of thin sheets (thickness < 1 mm) of similar and dissimilar NiTi alloys with AISI 304 stainless steel using the Gas Tungsten Arc Welding (GTAW) process and to study the mechanical and metallur
Externí odkaz:
https://doaj.org/article/1709ba48a2c842779224d2c1348ee74f
Autor:
Diva Maria Bessa Wolff, Filipe Martel de Magalhães Borges, Wilson Acchar, Theóphilo Moura Maciel
Publikováno v:
Revista Principia, Vol 0, Iss 9, Pp 49-52 (2001)
O presente trabalho tem como objetivo investigar a microestrutura e a microdureza de uma alumina sinterizada a 1650o durante 2 horas.
Externí odkaz:
https://doaj.org/article/327a022ce0fe44cc8ff7206bda5c7ffc
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:
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