Influence of Anodization on the Fatigue and Corrosion-Fatigue Behaviors of the AZ31B Magnesium Alloy

Autor(es)

de Oliveira, Leandro Antonio ^[1] ; dos Santos, Silvano Leal ^[2] ; de Oliveira, Vinicius Antonio ^[3] ; Antunes, Renato Altobelli ^[1]

Afiliação do(s) autor(es)

^[1] Fed Univ ABC UFABC, Ctr Engn Modelagem & Ciencias Sociais Aplicadas C, BR-09210580 Santo Andre, SP - Brazil

^[2] Fac Tecnol Sao Paulo FATEC SP, Lab Processamento & Caracterizacao Mat, BR-01124060 Sao Paulo, SP - Brazil

^[3] Univ Fed Sao Carlos UFSCar, Dept Engn Mat DEMa, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: METALS; v. 11, n. 10 OCT 2021.
• Citações Web of Science: 0

Resumo

The aim of the present work was to investigate the effect of anodization on the fatigue and corrosion-fatigue behavior of the AZ31B magnesium alloy. Samples were anodized in constant current density mode at 20 mA cm(-2) for 5 min at room temperature, in an environmentally friendly electrolyte consisting of a mixture of sodium hydroxide and sodium silicate. Fatigue tests were conducted in air and in phosphate buffer solution (PBS) at room temperature in the tension-tension mode, at a frequency of 5 Hz and stress ratio of 0.1. S-N curves were obtained for polished and anodized samples. Fracture surface morphology was examined by optical stereo-microscopy and scanning electron microscopy. Results indicated that the fatigue limit was reduced approximately 60% at 10(6) cycles for the anodized specimens, either for the fatigue tests conducted in air or PBS solution. Anodization had a remarkable effect on the fatigue behavior of the AZ31B alloy. The effect of the corrosive environment, in turn, was not significant.</p> (AU)

• Processo FAPESP: 15/22921-6 - Influência de tratamentos de anodização da liga de magnésio az31 sobre seu comportamento de corrosão associada à fadiga em meio fisiológico
• Beneficiário: Renato Altobelli Antunes
• Modalidade de apoio: Auxílio à Pesquisa - Regular