About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
New Frontiers in Physical Metallurgy of Steels
|
| Presentation Title |
Comparison of Microstructure and Mechanical Properties of the Heterogeneous Nanostructured SUS316LN Stainless Steels |
| Author(s) |
Hiromi Miura, Chihiro WATANABE |
| On-Site Speaker (Planned) |
Hiromi Miura |
| Abstract Scope |
SUS316LN austenitic stainless steels with different chemical compositions prepared through different thermo-mechanical processes (TMPs) were heavily cold rolled to develop heterogeneous nanostructures, in which characteristic “eye”-shaped twin domains were surrounded by shear bands and they were embedded in low-angle lamellae. The twin domains having <111>//ND orientation effectively contributed to reduce the intensity of sharp <101>//ND rolling texture. Nevertheless, the evolved textures were almost same, regardless chemical composition and TMP. The tensile strength showed large anisotropy of about 1.6 GPa along RD and 1.9 GPa along TD irrespective of chemical composition and TMP. The tensile strength was further raised with aging to induce grain-boundary segregation up to 1.9 GPa along RD and 2.3 GPa along TD. The above results demonstrate that the evolution of heterogeneous nanostructure is rather insensitive to difference in chemical composition and TMP, i.e., easy to fabricate even while utilizing new strengthening mechanisms. |