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 work, the bake-hardening (BH) response of an Al-3.0Mg-1.0Cu (in mass%) alloyhas been improved by the small addition of Ag as a good example of our proposed Nanocluster AssistProcessing (NCAP) technique. From the detailed observation through high resolution transmissionelectron microscopy (HRTEM), it is found that the origin of the increased hardness in the Ag-addedalloy is attributed to the densely and uniformly formed Z phase at the expense of Guinier-Preston-Bagaryatsky (GPB) zones and the S’ phase. It is new findings that the Z phase is formed even in theternary alloy although the chemical composition lies in the (α+S+T) phase field. Based on the threedimensionalatom probe (3DAP) results, furthermore, it is suggested that nanoclusters of Mg, Agand/or Cu provide effective nucleation sites for the Z phase, whereas nanoclusters of Mg and Cu doless. Such unique characteristics of Ag are clearly seen in the newly constructed interaction energymap (IE map)
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/13/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.519-521.215.pdf
