Welding Thermal Cycle Impact on the Microstructure and Mechanical Properties of Thermo–Mechanical Control Process Steels

• DOI: 10.1002/srin.202000645
• Publication Date: 2021-01-29T16:08:52Z
• Authors: Anatoliy Zavdoveev; Valeriy Poznyakov; Thierry Baudin; Mark Heaton; Hyoung Seop Kim; Philippe Acquier; Mykola Skory; Massimo Rogante; Anatoliy Denisenko
• Keywords: microstructure; Mechanical properties; 02 engineering and technology; mechanical properties; Normalized steels; thermo?mechanical control processes; [SPI]Engineering Sciences [physics]; [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph]; welding thermal cycle; [CHIM]Chemical Sciences; Welding; Microstructure; Thermal cycling; Microstructure and mechanical properties; TMCP steels; Welding thermal cycles; Grain growth; Fine-grained microstructure; 0205 materials engineering; Ferritic; Mechanical control; Process control; Structure and properties; thermo-mechanical control process

Steels obtained by the thermo–mechanical control process (TMCP) possess a higher level of strength than conventional normalized steels due to the fine‐grained microstructures generated during TMCP. Such enhancement opens ways to decrease metal construction weight. At the same time, TMCP steels have less thermal stability, in connection with a lot of factors affecting and governing grain growth during the heating of TMCP steels. Herein, the effects of the welding thermal cycle (WTC) on the structure and properties of TMCP steels of ferritic–perlite (S460M) and bainitic (alform 620M) types are systematically investigated.