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Mechanism-Based Variability in Fatigue Life of Ti-6Al-2Sn-4Zr-6Mo Pages: 12 Published: Jan 2004
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View License Agreement Source: STP1450-EB Abstract The variability in fatigue life of a Ti-6Al-2Sn-4Zr-6Mo alloy was studied. The cumulative life distribution plot was found to be composed of two distinct failure mechanisms, designated as Type-I and Type-II. The likelihood of Type-I vs. Type-II failure shifted with respect to the stress level, such that at lower stress levels, there was increased probability of Type-II failure. It also was found that the variability in life was introduced primarily at the crack nucleation stage, specifically, formation of a stage-I crack across an equiaxed primary- particle.
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