About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Advancements in Steel Structural Refinement
|
| Presentation Title |
Microstructure and Processing of Heavy-Gauge S700MC Hot Rolled Steel |
| Author(s) |
Rekha My Rao, Brian K. Lin, Dimitri M Sidorenko, Srinivas R Atreya |
| On-Site Speaker (Planned) |
Rekha My Rao |
| Abstract Scope |
S700MC is a high yield structural steel grade widely used in trailer applications to reduce the weight of components and increase fuel efficiency. In the current study, advanced microstructural characterization was performed on industrially produced hot-rolled S700MC steels of 6.35 mm and 9.5 mm thickness. Using electron backscatter diffraction (EBSD) and transmission electron microscope (TEM) techniques, the microstructure was characterized through the length and thickness. The microstructure via EBSD exhibited varying fractions of polygonal and non-polygonal ferrite phases with the presence of carbon-rich microconstituents and grain sizes dependent on the location. TEM analysis revealed the impact of precipitate size and volume fraction on strength. Based on the EBSD and TEM results, the theoretical yield strength contributions from the chemistry, grain size, dislocation density, and precipitation were compared against the experimentally tested yield strength and discussed. |