Fusion Weldabilities of Advanced High Manganese Steels: A Review

• Published in: Metals and materials international Vol. 27; no. 7; pp. 2046 - 2058
• Main Authors: Park, Gitae, Jeong, Seonghoon, Lee, Changhee
• Format: Journal Article
• Language: English
• Published: Seoul The Korean Institute of Metals and Materials 01.07.2021; Springer Nature B.V; 대한금속·재료학회
• Subjects: Austenitic stainless steels; Characterization and Evaluation of Materials; Chemistry and Materials Science; Engineering Thermodynamics; Fusion welding; Heat affected zone; Heat and Mass Transfer; High strength steels; Machines; Magnetic Materials; Magnetism; Manganese steels; Manufacturing; Materials Science; Mechanical properties; Metallic Materials; Metallurgy; Microstructure; Processes; Solid Mechanics; Stacking fault energy; Steel; TRIP steels; TWIP steels; 재료공학; High manganese steel; Phase transformation; Advanced high strength steel; Microstructure; Fusion welding
• ISSN: 1598-9623; 2005-4149
• DOI: 10.1007/s12540-020-00706-9

A large amount of manganese has been added to next-generation advanced high strength steels for automotive applications. The increased manganese content changes the microstructural and mechanical characteristics by varying both the stacking fault energy and the austenite stability, but it is known to deteriorate weldability. The current review provides a general strategy to address several problems in fusion welds of advanced high manganese steels from the viewpoint of microstructural transitions, plasticity mechanism, and mechanical properties based on the welding metallurgy. The importance of research on the weldabilities of advanced Mn steels was highlighted. Among the representative types of advanced manganese steels, this review focuses on high Mn twinning-induced plasticity steel, high Mn austenitic lightweight steel, and medium Mn transformation-induced plasticity steel. Specifically, this review suggests fundamental concepts for designing each steel with improved weld characteristics by presenting many research results on the correlations between the microstructure and mechanical properties of welds and heat-affected zones for these three different steel groups. Graphic Abstract