Creep–fatigue interaction behavior of nickel-based single crystal superalloy at high temperature by in-situ SEM observation
Source abstract
Abstract
Abstract Creep-fatigue interaction behavior of nickel-based single crystal superalloy was studied in an in-situ SEM platform at 900 °C. Dwell times of 15, 30, 60, 90, 120 s were introduced at the tensile peak stress of each cycle. Experimental results showed that the life cycles firstly decreased rapidly then slightly increased with the increasing dwell time, which was explained by the accumulated inelastic strain. Dislocation microstructure and inelastic strain were correlated for different dwell time by TEM analysis. Crack propagation mode transition was analyzed. Comparing with the stress intensity factor amplitude, crack tip opening displacement was more suitable for characterizing the creep-fatigue small crack growth rate.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: High Temperature Alloys and Creep · Fatigue and fracture mechanics · Aluminum Alloy Microstructure Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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