Effect of hydrogen on the fatigue behavior of the near-beta Ti-5Al-5Mo-5V-3Cr alloy

Autor(es)

Campanelli, Leonardo Contri ; Carvalho Pereira da Silva, Paulo Sergio ; Jorge, Jr., Alberto Moreira ; Bolfarini, Claudemiro

• Tipo de documento: Artigo Científico
• Fonte: SCRIPTA MATERIALIA; v. 132, p. 39-43, APR 15 2017.
• Citações Web of Science: 6

Resumo

The influence of hydrogen at low limits on the fatigue behavior of Ti-5553 alloy has been studied. The formation of hydrides was investigated using a high-resolution facility coupled to a transmission electron microscope that provided phase and orientation mappings at the nanometric scale. Besides the fatigue limit reduction for the highest hydrogen content, the predominance of subsurface crack initiation sites with cleavage planes and ductile features in contrast to quasi-cleavage facets in the unstable crack propagation zone suggested the influence of hydrogen. The formation of hydrides, in this case, was attributed to be the reason for the different fatigue behaviors. (C) 2017 Acta Materialia Inc Published by Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 13/04423-3 - Comportamento em fadiga de ligas de titânio beta
• Beneficiário: Leonardo Contri Campanelli
• Modalidade de apoio: Bolsas no Brasil - Doutorado