|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advanced High-strength Steels
||The Super High Strength of Aluminium-added Medium Manganese Steel after the Quenching and Tempering-associated Partitioning Process
||Juhua Liang, Zhengzhi Zhao, Jiangtao Liang, Di Tang
|On-Site Speaker (Planned)
Quenching and tempering-associated partitioning (Q–T & P) was applied to the aluminium-added medium manganese steel. The experimental steel with tempered martensite matrix and stabilized retained austenite exhibited the super high strength combining with the comparable elongation. The yield strength is elevated from 1010 MPa to 1223 MPa after the tempering treatment, while the tensile strength varies from 1871 MPa to 1731 MPa. Obviously higher carbon content and more retained austenite after the tempering treatment, as revealed by X-ray diffraction (XRD) analysis, accounts for the improved uniform elongation from 4.2 % to 10.3 %. This also proves the mobile α’ / γ interface during the partitioning in the experimental steel. In addition, the microstructure with tempered martensite matrix mainly results in the significant necking, and the fresh martensite matrix accounts for the rapid crack propagation without any necking.
||Planned: Supplemental Proceedings volume