ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The microstructure, mechanical properties, creep and corrosion resistance ofMg-Gd-Y-Zr(-Ca) alloys were studied. Small additions of 0.4-0.6 wt% Ca toMg-(9-10)Gd-3Y-0.4Zr(wt.%) alloys led to a slight improvement in creep resistance and aremarkable increase in corrosion resistance, but an obvious decrease in elongation to fracture. UTSand TYS of the Mg-Gd-Y-Zr(-Ca) alloys are obviously higher than those of WE54, especially in thetemperature range from room temperature to 200 oC. TEM images and corresponding energydispersive x-ray spectra showed that the Ca element primarily segregated to the grain boundaries andexisted in the cuboid-shaped particles with a trace concentration, and the small addition of Ca had noobvious effect on the orientation, morphology, and distribution of β′ phase, which is responsible forthe peak hardness in Mg-Gd-Y-Zr alloys
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.101.pdf
Permalink
