Paper Title:
Tensile Property of Submicrocrystalline Pure Fe Produced by HPT-Straining
| Periodical | Materials Science Forum (Volumes 584 - 586) |
|---|---|
| Main Theme | Nanomaterials by Severe Plastic Deformation IV |
| Edited by | Yuri Estrin and Hans Jürgen Maier |
| Pages | 597-602 |
| DOI | 10.4028/www.scientific.net/MSF.584-586.597 |
| Citation | Yoshikazu Todaka et al., 2008, Materials Science Forum, 584-586, 597 |
| Online since | June, 2008 |
| Authors | Yoshikazu Todaka, Yoshii Miki, Minoru Umemoto, Chao Hui Wang, Koichi Tsuchiya |
| Keywords | Grain Refinement, High Pressure Torsion (HPT), Iron, Severe Plastic Deformation (SPD), Tensile Properties |
| Price | US$ 28,- |
View full size
Abstract
The microstructure and the mechanical properties of pure Fe after HPT-straining at a rotation-speed of 0.2 rpm under a compression pressure of 5 GPa were investigated. The elongated grains with 300 nm thick and 600 nm long were observed at r = 1.5 mm away from the disk center regions after HPT-straining for 5 turns ( εeq = 45). The obtained Vickers microhardness in the submicrocrystalline Fe after 5 turns was around Hv 3.6 GPa. The engineering tensile strength and total elongation of the HPT-processed Fe for 10 turns were 1.9 GPa and 30 %. These facts suggest that HPT-straining leads to significant refinement of microstructure and increase in strength with good ductility.
