Monitoring of fatigue damage development in as-received and exploited 10CrMo9-10 power engineering steel supported by Digital Image Correlation

• Published in: The International journal of pressure vessels and piping 2023-04, Vol.202, p.104889, Article 104889
• Main Authors: Brodecki, A., Kopec, M., Kowalewski, Z.L.
• Format: Article
• Language: English
• Subjects: 10H2M steel; Damage; Digital image correlation (DIC); Fatigue development
• ISSN: 0308-0161; 1879-3541
• DOI: 10.1016/j.ijpvp.2023.104889

This research aimed to compare the effect of long-time degradation of two different states of 10CrMo9-10 (10H2M) power engineering steel by using different experimental and analytical approaches. The specimens machined from the as-received steel and the same material after exploitation for 280 000 h at the temperature of 540 °C and the internal pressure of 2.9 MPa were subjected to fatigue loading that was simultaneously monitored by using the Digital Image Correlation (DIC) technique. The effect of long-time degradation on the mechanical response of 10H2M steel was studied through fractographic observations and was finally described as a function of the fatigue damage measure, φ, and the fatigue damage parameter D. •The effect of long-time degradation on the mechanical response of 10H2M was studied.•Fatigue damage development could be quantitatively described by the method proposed.•Fatigue lifetime of 10H2M steel decrease by up to 400% after 32 years of exploitation.