Static recovery of tempered lath martensite microstructures during long-term aging in 9–12% Cr heat resistant steels

• Published in: Materials letters Vol. 63; no. 28; pp. 2423 - 2425
• Main Authors: Ghassemi-Armaki, H., Chen, R.P., Maruyama, K., Yoshizawa, M., Igarashi, M.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 30.11.2009
• Subjects: High Cr ferritic steels; M 23C 6 and MX precipitates; Static recovery; Tempered lath martensite; Static recovery; M 23C 6 and MX precipitates; High Cr ferritic steels; Tempered lath martensite
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2009.08.024

Static recovery of tempered lath martensite microstructures of strength enhanced ferritic steels has been investigated during very long-term aging up to 2 × 10 4 h at 650 °C for 3 steels containing 9 to 12% Cr. Static recovery of tempered lath martensite microstructure occurs after an incubation period for 1–2 × 10 3 h in the steels. The static recovery is controlled by the loss of strengthening due to M 23C 6 precipitates, and disappearance of MX carbonitrides cannot be the main cause of the static recovery.