Effects of Distribution and the Formation Process of MA on Deformation and Toughness of High Strength Linepipe Steel

• Published in: ISIJ International Vol. 53; no. 2; pp. 317 - 322
• Main Authors: Tsuyama, Seishi, Nakamichi, Haruo, Yamada, Katsumi, Endo, Shigeru
• Format: Journal Article
• Language: English
• Published: Tokyo The Iron and Steel Institute of Japan 2013; Iron and Steel Institute of Japan
• Subjects: Applied sciences; Exact sciences and technology; Fractures; grain boundary character; high deformable steel; martensite-austenite constituent; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Metals. Metallurgy; on-line heat process; Deformation; on-line heat process; High strength steel; Rupture; Mechanical properties; martensite-austenite constituent; Grain boundary; Pipeline; Fracture toughness; high deformable steel; grain boundary character; Austenite; Microstructure; Martensite; Formation mechanism; Strength

Based on the strain-based concept of linepipe products, materials with high deformability are desirable and a dual-phase microstructure consisting of harder and softer phases is essential to obtain higher deformability. Martensite-austenite constituents (MA) are very important in the hard phase for...