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:
To improve the strength-toughness and heat-resistance of die cast magnesium alloy, theZA85 alloy has been prepared by adding proper amount of spherical quasicrystals containing masteralloy. The results indicate that the solidification microstructure is inlaid with quasicrystal particles,which is a new phase i(Mg45Zn47Y5Mn3), co-existing with the α-Mg, Φ(Al2Mg5Zn2) phase andτ(Mg32(AlZn)49) phase. Mechanical properties of ZA85 alloys have been dramatically improvedowing to the obvious grain refinement of the matrix microstructure. While adding 1.7 wt %spherical quasicrystal containing master alloy, macro-hardness of ZA85 magnesium alloy reaches75HB; meanwhile, impact toughness reaches the peak value 18.4Jcm-2, which is about 202% ofZA85 base alloy. Due to the pinning effect of quasicrystal particles on grain boundaries, thestrengthened ZA85 alloys would have excellent heat-resistance
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.1267.pdf
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