Effect of hydrogen pick -up on the fatigue behavior of the beta-type Ti-12Mo-6Zr-2Fe alloy with omega-nanoprecipitation

Autor(es)

Campanelli, Leonardo Contri ^{[1, 2]} ; Escobar Claros, Cesar Adolfo ^[3] ; Martins Freitas, Brenda Juliet ^[3] ; Pereira Reis, Danieli Aparecida ^[2] ; Jorge, Jr., Alberto Moreira ^{[1, 4, 5]} ; Bolfarini, Claudemiro ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Mat Engn, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Fed Sao Paulo, Inst Sci & Technol, BR-12231280 Sao Jose Dos Campos, SP - Brazil

^[3] Univ Fed Sao Carlos, Grad Program Mat Sci & Engn, BR-13565905 Sao Carlos, SP - Brazil

^[4] Grenoble Alpes Univ, CNRS, LEPMI, F-38000 Grenoble - France

^[5] Grenoble Alpes Univ, SIMAP, F-38000 Grenoble - France

• Tipo de documento: Artigo Científico
• Fonte: Materials Letters; v. 282, JAN 1 2021.
• Citações Web of Science: 0

Resumo

The metastable beta-type Ti-12Mo-6Zr-2Fe alloy was subjected to an assessment of its fatigue mechanical behavior. Promising tensile and fatigue properties were obtained when the alloy was solution treated and quenched, because nanocrystalline particles of x phase were formed throughout the b matrix. When the material was subjected to a protocol of chemical etching and a subsequent surface polishing, the fatigue limit decreased significantly as a result of H pick-up, although the tensile properties were not changed. The increase of the local H concentration caused the precipitation of fine hydrides at high energy grain boundaries. Fatigue crack initiation changed to a subsurface mode induced by the cleavage of hydride precipitates. (C) 2020 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 16/12995-5 - Fadiga de uma liga beta metaestável de titânio para aplicação como biomaterial
• Beneficiário: Leonardo Contri Campanelli
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado