Grain Refinement and Dispersion Precipitation of I-Phase in Mg-Zn-Y Alloy Processed by ECAP
| Periodical | Materials Science Forum (Volumes 667 - 669) |
|---|---|
| Main Theme | Nanomaterials by Severe Plastic Deformation: NanoSPD5 |
| Edited by | Jing Tao Wang, Roberto B. Figueiredo and Terence G. Langdon |
| Pages | 593-598 |
| DOI | 10.4028/www.scientific.net/MSF.667-669.593 |
| Citation | Guang Hui Min et al., 2010, Materials Science Forum, 667-669, 593 |
| Online since | December, 2010 |
| Authors | Guang Hui Min, Hong Wei Cui, Qing Liang Lu, Pan Gao, Hua Shun Yu |
| Keywords | Equal-Channel Angular Pressing (ECAP), Grain Refinement, Icosahedral Quasicrystal Phase, Mg-Zn-Y Alloy |
| Price | US$ 28,- |
Equal channel angular pressing (ECAP) has been conducted on as-extruded Mg-Zn-Y alloy containing quasicrystal phase at a temperature of 523 K. The optical images indicate that after 8 ECAP passes through route BA, the grain size of the extruded alloy is decreased sharply; and the coarse eutectic icosahedral quasicrystal phases (I- phases) are broken and dispersed in the alloy; and the distributions of Zn and Y elements become more homogeneous. These can be attributed to the shear effect during the ECAP processing. TEM micrographs show the grain refinement, the evolution of broken and dispersed I- phases and dispersion precipitation of nano I-phases during 1- ,4- and 8- pass ECAPed Mg-Zn-Y alloy. And the mechanism of grain refinement is also discussed.