About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Ultrafine-Grained and Heterostructured Materials (UFGH) XIV
|
| Presentation Title |
Characteristic microstructure and strengthening mechanisms of heterogeneous nano-structured copper alloys and austenitic stainless steels |
| Author(s) |
Hiromi Miura, Yoshiteru AOYAGI, Chihiro WATANABE |
| On-Site Speaker (Planned) |
Hiromi Miura |
| Abstract Scope |
Cu alloys and austenitic stainless steels with low-stacking energy were heavily cold-rolled to develop complicated heterogeneous nano-(HN-)structures, which were fragmented mainly by mechanical twinning and shear banding. The spacings or widths of the evolved microstructural components of twin grain-boundary, shear band and low-angle lamellae were about 25 nm, 40 nm, and 40 nm in average, which were much finer than those attained by sever plastic deformation methods. Hence, ultrafine-grained structures so-called “HN-structure” could be easily developed by means of conventional rolling processes employing deformation-induced microstructures. All the Cu alloys and stainless steels exhibited notably high tensile strength close to 1 GPa or over 2 GPa respectively, without spoiling ductility. Tensile strengths were further raised by low-temperature annealing. The strengthening by the annealing was assumed to be induced by grain-boundary segregation. The strengthening mechanisms in the HN-structured Cu alloys and stainless steels will be precisely discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Mechanical Properties, Copper / Nickel / Cobalt |