| Autor: |
Ji Xue Zhou, Yun Teng Liu, Yuansheng Yang, Hong Min Jia, Wei Rong Li, Yang De Li, Xiao Hui Feng, Tian Jiao Luo |
| Rok vydání: |
2015 |
| Předmět: |
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| Zdroj: |
Materials Science Forum. 816:439-445 |
| ISSN: |
1662-9752 |
| DOI: |
10.4028/www.scientific.net/msf.816.439 |
| Popis: |
The microstructure and mechanical properties of the high-purity magnesium (99.99wt.% Mg) extruded by single direct extrusion experiment were investigated. For the extrusion speed of 0.2mm/s, the microstructure of extruded Mg rods was composed of equiaxed fine dynamical recrystallized (DRXed) grains and some elongated coarse un-DRXed grains. The yield strength (YS) and the elongation of the extruded bars were 105.3MPa and 46.7% respectively. In the case of extrusion speed of 4.0mm/s, the DRXed grains were remarkably coarsened and the elongated coarse un-DRXed grains vanished, meanwhile lots of twins occurred and the intensity of basal-plane texture increased a little. With the extrusion speed being raised from 0.2mm/s to 4.0mm/s, the YS and the elongation decreased to 60.5MPa and 22.1% respectively, but the ultimate tensile strength (UTS) was improved from 154.7MPa to 178.8MPa. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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