Implementation of Recent Advances in Fracture Toughness Testing to Investigate Tearing Resistance of Heat-Resistant Steel 14MoV6-3
DOI:
https://doi.org/10.24425/amm.2025.152548Abstract
Since WWII, progress has been made in understanding how materials fail and how to prevent such failures. In this work, the newly standardized Single Edge Notch Tension (SENT) specimen is used to assess the ductile tearing resistance of 14MoV-3 steel. Crack Tip Opening Displacement (CTOD90) is measured using Unloading Compliance (UC) and Direct Current Potential Drop methods (DCPD) to measure crack growth. The tearing resistance curves were determined for the new as-received samples and after degradation by creeping. The maximum loads, the CTOD at crack initiation, and resistance curves were compared for each ageing stage. As-received specimens resulted in the highest CTOD90 compared to the creep-degraded specimens. DCPD provided a better crack prediction compared to UC.