|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advanced High-strength Steels
||Nanoscale Precipitation and Strengthening Mechanisms in Steels
||Zhongwu Zhang, SongSong Xu, Yu Zhao
|On-Site Speaker (Planned)
Nanoscale precipitation and the strengthening mechanisms of these precipitates in both ferritic and dual phase steels are presented. Our study provides compelling experimental evidence that these nanoscale precipitates consist of a duplex structures with a Cu-enriched bcc core partially encased by a B2-ordered Ni(Mn,Al) phase. This duplex structure provides a more complex obstacle for dislocation movement due to atomic ordering together with interphases, resulting in a high yield strength alloy without sacrificing alloy ductility in single ferritic steel. Nanoscale precipitation can be controlled to occur in ferrtic phase while retained austenite is free from precipitation, leading to a combination of high strength and high ductility.
Research supported by the Fundamental Research Funds for the Central Universities (HEUCFP201703), the NSFC Funding (51371062 and U1460102), the High-Tech Ship Research Projects Sponsored by MIIT (K24367).
||Planned: Supplemental Proceedings volume