Abstract
In a previous study, the carbon concentration dependence of the deformation twinning behavior in twinning-induced plasticity steels was investigated, which clarified that the deformation twin fraction in the <144> tensile orientation did not change with the carbon concentration. In this study, twinning deformation occurred in the Fe-18Mn-1.2C steel at 473 K with a relatively high stacking fault energy of 55 mJ/m2. To explain these experimental results, dynamic strain aging of Shockley partials dislocations was proposed as an additional contributing factor to assist the deformation twinning in high-carbon-added austenitic steels. Most abnormalities concerning deformation twinning such as the high stacking fault energy in Fe-Mn-C austenitic steels were interpreted by considering the effect of dynamic strain aging.
Original language | English |
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Pages (from-to) | 1754-1761 |
Number of pages | 8 |
Journal | Isij International |
Volume | 55 |
Issue number | 8 |
DOIs | |
Publication status | Published - 2015 |
Externally published | Yes |
Keywords
- Austenitic steel
- Deformation twinning
- Dynamic strain aging
- Electron backscatter diffraction (EBSD)
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry