Microstructure, Mechanical Properties, Creep and Corrosion Resistance of Mg-Gd-Y-Zr(-Ca) Alloys
| Periodical | Materials Science Forum (Volumes 546 - 549) |
|---|---|
| Main Theme | Progress in Light Metals, Aerospace Materials and Superconductors |
| Edited by | Yafang Han et al. |
| Pages | 101-104 |
| DOI | 10.4028/www.scientific.net/MSF.546-549.101 |
| Citation | Shang Ming He et al., 2007, Materials Science Forum, 546-549, 101 |
| Online since | May, 2007 |
| Authors | Shang Ming He, Xiao Qin Zeng, Li Ming Peng, Xin Wu Guo, Jian Wei Chang, Wen Jiang Ding |
| Keywords | Calcium, Corrosion Resistance, Heat Resistant Magnesium Alloys, Mechanical Property, Mg-Gd-Y Alloy |
| Price | US$ 28,- |
The microstructure, mechanical properties, creep and corrosion resistance of Mg-Gd-Y-Zr(-Ca) alloys were studied. Small additions of 0.4-0.6 wt% Ca to Mg-(9-10)Gd-3Y-0.4Zr(wt.%) alloys led to a slight improvement in creep resistance and a remarkable increase in corrosion resistance, but an obvious decrease in elongation to fracture. UTS and TYS of the Mg-Gd-Y-Zr(-Ca) alloys are obviously higher than those of WE54, especially in the temperature range from room temperature to 200 oC. TEM images and corresponding energy dispersive x-ray spectra showed that the Ca element primarily segregated to the grain boundaries and existed in the cuboid-shaped particles with a trace concentration, and the small addition of Ca had no obvious effect on the orientation, morphology, and distribution of β′ phase, which is responsible for the peak hardness in Mg-Gd-Y-Zr alloys.
