The previous proposed models to describe the room temperature dynamic strain aging of twinning-induced-plasticity steels appear to be theoretically invalid in the case of lightweight grades. The proposed theory in the present work accentuates the high capability of the experimented dilute solid solution in progressive formation and refinement of the cell structures. The higher dislocation population in the cell-walls in comparison to that of cell-interiors is viable enough to increase the stress assisted drift and stimulate the sub-boundaries preferred sites to accommodate the solutes. The short-range dislocation core diffusion enables the cell-walls to assist the strain aging to occur.
Bibliographical noteFunding Information:
This work was partly supported by the National Research Foundation of Korea (NRF) grant funded by Korea government (MSIP) (No. 2010-0018289 ) and Brain Korea 21 Plus project in 2017. The first author thanks the partial scientific support of Mr. Mehrdad Ghiasabadi Farahani form University of Tehran.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys