| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Spatially Tailored Materials: Processing-Structure-Properties
|
| Presentation Title |
Effects of stacking-fault energy and thermo-mechanical treatments on evolution of heterogeneous nanostructure and mechanical properties of SUS316LN stainless steels |
| Author(s) |
Hiromi Miura, Yojiro Oba, Masakazu Kobayashi, Chihiro Watanabe |
| On-Site Speaker (Planned) |
Hiromi Miura |
| Abstract Scope |
Various kinds of SUS316LN austenitic stainless steels with different stacking fault energies (SFE) and prepared through different thermo-mechanical processes (TMPs) were heavily cold rolled. SFE were changed from 46.8 to 60.0 mJ/m2 by excess additions of Si and Mn, and TMPs were aging, solution treatment and rolling pass strain. Typical heterogeneous nano(HN)-structure, in which “eye”-shaped twin domains were surrounded by shear bands and they were embedded in low-angle lamellae, developed in all the samples. While the number density of twin domains appeared almost constant independent of SFE and TMP, the area fraction and size of twin domains as well as twin-boundary spacing, widths of shear bands and low-angle lamellae tended to increase in the solution-treated samples initially composed of coarse grains. Therefore, tensile strength tended to decrease in the solution-treated samples. These results suggest important role of initial grain size before cold rolling on HN-structure evolution and strengthening. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Iron and Steel, Mechanical Properties |