|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||Advances in Titanium Technology
||Improvement of Mechanical Properties of Pure Ti by Combined Process of Multi-directional Forging and Conventional Thermo-mechanical Processing
||Hiromi Miura, Yutaro Iwabuchi, Masakazu Kobayashi, Tomotsugu Shimokawa, Chihiro Watanabe
|On-Site Speaker (Planned)
Pure Ti was multi-directionally forged at room temperature employing various pass strains from 0.2 to 0.8 and forging strain rates from 1.0×10-3s-1 to 1.0×10-2s-1. In the all MDFing conditions, grains were gradually fragmented with increasing cumulative strain of MDFing. The forging stress increased more rapidly when the pass strain became larger, and the hardness also increased accordingly. Nevertheless, failure tended to take place more easily with increasing pass strain. When examined the evolved microstructure, it was found that grain fragmentation looked more proceeded with increasing pass strain and strain rate. This grain subdivision was mainly induced by multiple twinning. Tensile strength was gradually increased with cumulative strain and superior mechanical properties of tensile strength of about 1GPa and fracture strain of 20% were attained. Tensile strength was more raised by ageing and cold rolling up to 1.2 GPa with ductility of about 10%.
||Titanium, Mechanical Properties, Process Technology