Abstract
Low cycle fatigue tests on the hydrogenated welding seam of Zr–Sn–Nb alloy at room temperature and 360 °C had been carried out by using the funnel-shaped flat specimens. The relationships between nominal stress & strain directly measured across the funnel and local stress & strain at the root of the funnel are given by considering cyclic plasticity correction. The results show that the fatigue resistance of welding seam at room temperature is only slightly better than that at 360 °C. Probabilistic fatigue life curves are obtained by using a two-parameter power function.
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