Low-temperature toughness of direct quenched offshore steel. (November 2015)

• Record Type: Journal Article
• Authors: Cheng, T. C.; Yu, C.; Yang, T. C.; Huang, C. Y.; Lin, H. C.; Shiue, R. K.
• Is Part Of: Materials research innovations. Volume 19(2015)Supplement 9
• Page Start: S9-69
• Page End: S9-72
• Publication Date: 2015-11
• Subjects: Low-temperature impact toughness -- Offshore steel -- Microstructure -- Fractograph -- Direct quench; Materials -- Research -- Periodicals; Matériaux -- Recherche -- Périodiques; 620.1105
• DOI: 10.1179/1432891715Z.0000000001922
• Languages: English
• ISSNs: 1432-8917

Abstract

Abstract : The ductile-to-brittle transition of direct quenched and tempered martensite begins at 243 K, and the impact energy of the superficial region of the steel plate decreases from 104 J (243 K) to 50 J (213 K). In contrast, the ductile-to-brittle transition of bainite begins at room temperature. The impact energies of the central region of the steel plate at different testing temperatures are 107 J at room temperature (300 K), 47 J at 253 K and 26 J at 213 K. The presence of bainite in the central region of the direct quenched steel plate significantly degrades the low-temperature toughness of offshore steel.