| About this Abstract |
| Meeting |
Materials Science & Technology 2012
|
| Symposium
|
Recent Developments in High Strength Steels for Energy Applications
|
| Presentation Title |
Ferrite-Martensite Duplex Microstructure and Mechanical Property of a HSLA Steel |
| Author(s) |
Lian-yu Zhao, Wei Yan, Wei Wang, Xian-bo Shi, Yi-yin Shan, Ke Yang |
| On-Site Speaker (Planned) |
Yi-yin Shan |
| Abstract Scope |
The microstructure and mechanical property of a high strength low alloy steel after heat treated at different temperatures from 700 to 820℃ was investigated. Dual-phase microstructure containing finely dispersed martensite with different volume fractions was produced by water quenching. The volume fraction of martensite phase varied from 15% to 80% with the increasing of heat treatment temperature. Ferrite-martensite duplex microstructure displayed obvious difference compared with the as-received sample. The tensile strength was improved while the yield strength was decreased, thus the yield/tensile ratio was decreased prominently, which means better deformability. The tensile curve showed round-roof-shape, which implies excellent strain hardening ability. The work hardening exponent showed continuous change with the accumulation of plastic deformation. The charpy-V-notch impact property was also detected and proved non-deterioration when the martensite volume fraction was 50%~70%. |
| Proceedings Inclusion? |
Definite: A CD-only volume |