Abstract
The high cycle fatigue performance tests for nickel-based alloy HAYNES282 at room temperature, 700 and 760 °C had been carried out. The optical microscopy (OM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to observe the change features of microstructure and fracture. The results shows that the precipitation of γ′ phase which makes alloy has excellent high cycle fatigue performance is a guarantee of high strength of the alloy, and fatigue strength reduces slowly with the temperature increasing. The fracturing pattern was in monophyletic fatigue source, and extended in the form of cleavage and quasi cleavage and had obvious river pattern characteristics. At the same time, the fatigue cracks propagate in the form of dislocation slip, and the coarsening of γ′ hinder the dislocation sliding and climbing as the temperature rise, which improved the fatigue strength of the alloy.
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Yang, M. et al. (2017). High Cycle Fatigue Behavior of HAYNES282 Superalloy. In: Liu, X., et al. Energy Materials 2017. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-52333-0_19
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DOI: https://doi.org/10.1007/978-3-319-52333-0_19
Publisher Name: Springer, Cham
Online ISBN: 978-3-319-52333-0
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