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The effectiveness of microalloying addition and two-step aging on the mechanical
properties of the Al-Zn-Mg alloy has been investigated using TEM, tensile test and nanoindentation.
By decreasing width of PFZ and size of grain boundary precipitates through the addition of (Ag+Sn)
or two-step aging process, tensile properties of Al-Zn-Mg alloys are markedly improved. The
elongation was quantitatively related to the three microstructural factors; i.e. the width of PFZ, size of
grain boundary precipitates and the level of proof stress, to predict ductility of the alloys with known
microstructural factors. The fracture mode change is reasonably in terms of the hardness difference
between grain interiors and PFZ region by a noindentation technique.
Sprache
Englisch
Identifikatoren
ISSN: 0255-5476, 1662-9752
eISSN: 1662-9752
DOI: 10.4028/www.scientific.net/MSF.561-565.235
Titel-ID: cdi_proquest_miscellaneous_31311981
Format
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