Developing High Strain Rate Superplasticity in Aluminum Alloys
| Periodical | Materials Science Forum (Volumes 475 - 479) |
|---|---|
| Main Theme | PRICM-5 |
| Edited by | Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie |
| Pages | 2949-2954 |
| DOI | 10.4028/www.scientific.net/MSF.475-479.2949 |
| Citation | Cheng Xu et al., 2005, Materials Science Forum, 475-479, 2949 |
| Online since | January, 2005 |
| Authors | Cheng Xu, Minoru Furukawa, Zen Ji Horita, Terence G. Langdon |
| Keywords | Aluminum, Equal-Channel Angular Pressing (ECAP), Superplasticity |
| Price | US$ 28,- |
The conventional materials used in superplastic forming operations generally have grain sizes of ~2 µm or larger and they exhibit superplasticity at relatively low strain rates. Processing by equal-channel angular pressing (ECAP) produces materials having ultrafine-grain sizes, usually in the submicrometer range. If these ultrafine grains show reasonable stability at elevated temperatures, the alloys may exhibit a capability for achieving superplastic elongations at high strain rates. This paper examines the development of ultrafine-grained structures and superplastic ductilities in a spray-cast aluminum 7034 alloys through ECAP. The results show that ECAP is a very effective procedure for achieving grain refinement and superplasticity at rapid strain rates.
