Study on Microstructure and Properties of Bimodal Structured Ultrafine-Grained Ferrite Steel
AbstractThe objective of the study research was to obtain bimodal structured ultrafine-grained ferrite steel with outstanding mechanical properties and excellent corrosion resistance. The bimodal microstructure was fabricated by the cold rolling and annealing process of a dual-phase steel. The influences of the annealing process on microstructure evolution and the mechanical properties of the cold-rolled dual-phase steel were investigated. The effect of bimodal microstructure on corrosion resistance was also studied. The results showed that the bimodal characteristic of ferrite steel was most apparent in cold-rolled samples annealed at 650 °C for 40 min. More importantly, due to the coordinated action of fine-grained strengthening, back-stress strengthening, and precipitation strengthening, the yield strength (517 MPa) of the bimodal microstructure improved significantly, while the total elongation remained at a high level of 26%. The results of corrosion experiments showed that the corrosion resistance of bimodal ferrite steel was better than that of dual-phase steel with the same composition. This was mainly because the Volta potential difference of bimodal ferrite steel was smaller than that of dual-phase steel, which was conducive to forming a protective rust layer. View Full-Text
Scifeed alert for new publicationsNever miss any articles matching your research from any publisher
- Get alerts for new papers matching your research
- Find out the new papers from selected authors
- Updated daily for 49'000+ journals and 6000+ publishers
- Define your Scifeed now
Niu, G.; Wu, H.; Zhang, D.; Gong, N.; Tang, D. Study on Microstructure and Properties of Bimodal Structured Ultrafine-Grained Ferrite Steel. Metals 2017, 7, 316.
Niu G, Wu H, Zhang D, Gong N, Tang D. Study on Microstructure and Properties of Bimodal Structured Ultrafine-Grained Ferrite Steel. Metals. 2017; 7(8):316.Chicago/Turabian Style
Niu, Gang; Wu, Huibin; Zhang, Da; Gong, Na; Tang, Di. 2017. "Study on Microstructure and Properties of Bimodal Structured Ultrafine-Grained Ferrite Steel." Metals 7, no. 8: 316.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.