Análise da influência do hidrogênio na tenacidade quase estática de juntas soldadas de aços ARBL

Detalhes bibliográficos
Ano de defesa: 2014
Autor(a) principal: Almeida, Jose Goncalves de
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Tese
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal da Paraí­ba
BR
Engenharia Mecânica
Programa de Pós-Graduação em Engenharia Mecânica
UFPB
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: https://repositorio.ufpb.br/jspui/handle/tede/5385
Resumo: This study examined the influence of hydrogen in quasi-static toughness of dissimilar welded joint, consisting of base metals steel AISI 8630M and ASTM A36, HSLA steels classified as (High Strength Low Alloy). As a metal filler wire AWS-ERNiCrMo 3ARBL was used both in the buttering 8630M steel sheet as the welding filling. This is a welded joint similar to one of the most used joints in the oil sector that, by the last decade have shown some fractures by circumferential cracking, is being studied worldwide in order to identify the causes and safer solutions for your application. As parameter of fracture toughness is studied the CTOD (Crack Top Open Displecement) using type specimens SE(B) subjected to three point bending. The assays were performed in air after pre-doping cathodic hydrogen into water at 0°C synthetic sea, having to main references the standards ISO 12135: 2002 and ISO 15653: 2010 The results showed a significant susceptibility of the steel 8630M to retained hydrogen, reaching a embrittlement via CTOD around 25%. In turn, the dissimilar welding joint CTOD values present twice that of the base metal (steel 8630M), under the conditions with and without hydrogenation, had virtually no susceptibility to the cathodic hydrogen retained in their microstructure