Influence of Austenite Grain Size on the Crystallography of Allotriomorphic Ferrite in a Low Carbon Steel
| Periodical | Advanced Materials Research (Volumes 535 - 537) |
|---|---|
| Main Theme | Advanced Engineering Materials II |
| Edited by | Chunxiang Cui, Yali Li and Zhihao Yuan |
| Pages | 605-610 |
| DOI | 10.4028/www.scientific.net/AMR.535-537.605 |
| Citation | Yin Bai et al., 2012, Advanced Materials Research, 535-537, 605 |
| Online since | June, 2012 |
| Authors | Yin Bai, Hui Guo, Shan Wu Yang, Xin Lai He |
| Keywords | Allotriomorphic Ferrite, Austenite Grain Size, Crystallography, Grain Corner, Grain Edge |
| Price | US$ 28,- |
The influence of prior austenite grain size on the crystallography of allotriomorphic ferrite is investigated in a low carbon steel. The results show that as the prior austenite grain size decreasing, the fraction of allotriomorphic ferrites that do not keep K-S orientation relationship with any surrounding prior austenite grains is increased. It is observed that such ferrites usually form at the grain edges or grain corners. It is known that with the grain size decreasing, the fraction of grain edges and corners increases. It is suggested that the free energy of the defects at such nucleation sites is higher than that at grain faces, and the nucleation barrier of ferrite is lower. As a result, the possibility for the ferrite to form that does not have orientation relationship with all surrounding austenite grains is increased at such sites.
