Authors

Department of Metallurgy and Mechanics Eng., College of Engineering, Islamic Azad University, Yazd, Iran

Abstract

In this paper Fatigue behavior of various samples of Ti-6Al-4V titanium alloy were investigated using standard rotating-bending test. scanning electron microscopy (SEM) and optical microscopy (OM) were used to study the microstructure, crack propagation analysis and also to determine the chemical composition of different phases. The results revealed that the tested samples have the fatigue limit and fatigue life equal to 490 MPa and 1.2×107 cycles, respectively. In addition, the microstructural studies showed that the nucleation and propagation of fatigue cracks occur both from surface and internal bulk of the samples. Furthermore cracks deviate from their expected direction in case of facing β phase

Keywords

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