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:
In this paper, Al-10.8Zn-2.8Mg-1.9Cu alloy was synthesized by the spray atomization anddeposition technique. The microstructure and mechanical properties of the spray deposited alloy atvarious aging conditions (T6, T73 and RRA treatment) were studied using high-resolution electronmicroscopy, selected area diffraction, and tensile tests. The results indicate that the two types of GPzones, GPI and GPII zones are major precipitates for the alloy under peak-aged condition. The peakUTS and YS values achieved at an ageing temperature of 120 ℃ was 818 MPa and 793 MPa. Undertwo-step aging condition, the GP zones and η’ are major precipitates for the alloy, the discontinuousgrain boundary precipitates are favorable to SCC resistance in over-aged condition, which reduces itsstrength 58 MPa(about 7%) comparing to the peak-aged condition. RRA treatment decreased ultimatetensile strength 25 MPa (about 3%) in values compared with the alloy at T6 condition
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.561-565.809.pdf
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