Das, S. R., Shyamal, S., Jaskari, M., Chakraborti, P. C., Karjalainen, L. P., & Sahu, P. (2022). Transmission electron microscopy investigations on the twinning suppression attributes in a Fe-Mn-Al-C steel and the associated strain hardening. Materials Letters, 324, 132730. https://doi.org/10.1016/j.matlet.2022.132730
Transmission electron microscopy investigations on the twinning suppression attributes in a Fe-Mn-Al-C steel and the associated strain hardening
|Author:||Das, S.R.1; Shyamal, S.1; Jaskari, M.2;|
1Department of Physics, Jadavpur University, Kolkata 700 032, India
2Kerttu Saalasti Institute, University of Oulu, FIN-85500, Finland
3Department of Metallurgical and Material Engineering, Jadavpur University, Kolkata 700 032, India
4Centre for Advanced Steels Research, University of Oulu, FIN-90014, Finland
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2023041736867
|Publish Date:|| 2024-07-03
Suppression of twinning in a tensile deformed fine-grained (∼5 μm) Fe-Mn-Al-C steel is reported from transmission electron microscopy investigations. A high stable strain hardening ∼ 2 GPa was observed until 0.30 true strain despite twinning being largely suppressed, but seldom observed in regions devoid of dislocation substructure. Dislocation dipole and Taylor lattice were observed at low strains that transformed to dislocation cell structure at large strains. The twin deficiency could not be interpreted on the basis stacking fault energy of the steel, but the dislocation substructures in the matrix offered a preventive environment for twinning. The effect of cross-slip induced dislocation substructures on strain hardening in a twinning suppressed condition is discussed.
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
216 Materials engineering
The authors acknowledge Department of Science and Technology, Government of India, for funding this research under the grant number: CRG/2019/000858.
© 2022. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/