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:
Six kinds of Al-Zn-Mg-Cu alloys, modified with nickel and zirconium, have beenproduced by rapid solidification using spray deposition(the Osprey process). The effect of nickel onthe structures, mechanical properties of ultrahigh strength aluminium alloy is studied, and theprobable maximum of mechanical properties is predicted. There are three nickel-rich phases, Al3Ni2,Al7Cu4Ni and MgNi2, forming in 1%Ni alloy, its ultimate tensile strength(UTS) increased withincreasing extrusion ratios significantly while maintaining high levels of ductility, Futhermore, theextruded bars show enhancing more clearly than extruded plates in UTS and ductility. The content ofNi should decreased with increasing of Zn and Zr, and the highest properties(UTS=832MPa,Elongation=7.5%)are attained in 0.20Zr+0.30Ni (wt%)alloy. In addition, the size, the shape and thehomogeneous distribution of zirconium-rich phase produced in solidification is the key to effectingthe mechanical properties of materials when Zr content is 0.2~0.5%
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.871.pdf
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