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:
The interaction between vacancies and Sn and Cu solute atoms in an Al-1.7at.%Cu-0.01at.%Sn alloy was investigated by exploring the effect of incorporating natural ageing intoconventional age hardening treatment. It was found that provided the artificial ageing temperature doesnot exceed a critical value between 160°C and 200°C, a narrow window of natural ageing (3-100 h)will result in a significant acceleration of the age hardening response and no decrease in peak hardness.Transmission electron microscopy showed that this effect reflects a large and rapid increase in numberdensity of Cu GP(I) zones, and, to a lesser extent, of θ". The distribution and number density of θ' areessentially unaffected. Three-dimensional atom probe provided strong evidence that refinement ofGP(I) zone distribution is not due to clustering of Cu atoms onto pre-existing Sn clusters. Instead itappears to be caused by a subtle interaction between vacancies, Sn and Cu atoms
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/13/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.519-521.495.pdf
Permalink