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Artigo Científico | Fadiga | Inglês | 10/01/2006
Autores: Herman Jacobus Cornelis Voorwald, Maria Odila Hilário Cioffi, Midori Yoshikawa Pitanga Costa, V.A. Guimarães, Walter Luis Pigatin
Palavras-chave: anodization, fatigue, shot peening, titanium
Resumo: The increasingly design requirements for modern engineering applications resulted in the development of new materials with improved mechanical properties. Low density, combined with excellent weight/strength ratio as well as corrosion resistance, make the titanium attractive for application in landing gears. Fatigue control is a fundamental parameter to be considered in the development of mechanical components. The aim of this research is to analyze the fatigue behavior of anodized Ti-6Al-4V alloy and the influence of shot peening pre treatment on the experimental data. Axial fatigue tests (R = 0.1) were performed, and a significant reduction in the fatigue strength of anodized Ti-6Al-4V was observed. The shot peening superficial treatment, which objective is to create a compressive residual stress field in the surface layers, showed efficiency to increase the fatigue life of anodized material. Experimental data were represented by S-N curves. Scanning electron microscopy technique (SEM) was used to observe crack origin sites.
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