ISSN:
1013-9826
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:
Equal channel angular pressing (ECAP) was performed on extruded Mg-Zn-Y-Zr(Mg-5.0wt%Zn-0.9wt%Y-0.2wt%Zr) alloy at 300 oC. After 8 ECAP passes, average grain size ofthe alloy was reduced to about 1.4 μm, and the quasicrystalline phases were broken and dispersed inthe matrix. In addition, nano- quasicrystallines were precipitated from the matrix during ECAPprocessing. After ECAP, the elongation to failure of the extruded material was significantlyimproved. Only after 2 ECAP passes, the elongation to failure was 29%, and after 8 ECAP passes, itreached 35%, which was three times larger than that of the as-extruded alloy. However, both yieldstrength and ultimate tensile strength were decreased with the increasing ECAP passes, which wasconsidered to be resulted from the {0002} basal plane texture modification during ECAP
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.595.pdf
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