| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Light Metal Technology
|
| Presentation Title |
Effects of Pass Strains of Multi-directional Forging and Additive Cold Rolling of Pure Ti on the Microstructural Evolution and Mechanical Properties |
| Author(s) |
Hiromi Miura, Yojiro Oba, Masakazu Kobayashi, Chihiro Watanabe |
| On-Site Speaker (Planned) |
Hiromi Miura |
| Abstract Scope |
Pure Ti was multi-directionally forged (MDFed) employing various pass strains Δε from 0.2 to 0.8 at room temperature. Coarse initial grains were gradually fragmented with increasing cumulative strain ΣΔε of MDFing under all conditions. The forging stress increased more rapidly when the pass strain became larger, and the hardness also increased accordingly. Grain fragmentation looked more proceeded with increasing pass strain. This grain subdivision was mainly induced by multiple twinning. Tensile strength was, hence, gradually increased with cumulative strain. Superior mechanical properties of tensile strength about 1GPa and fracture strain of about 20% were achieved in spite of severe plastic straining. Tensile strength was further raised by ageing and cold rolling up to 1.2 GPa with ductility of about 10%. |