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:
This paper reviews some of the practical outcomes of exploiting secondary precipitationduring the heat treatment of aluminium alloys and discusses current understanding of thisphenomenon. Recent studies have utilised the techniques of positron annihilation spectroscopy(PAS), 3D atom probe (3DAP) as well as the more traditional transmission electron microscopy(TEM) and differential scanning calorimetry (DSC) to investigate early precipitation events thatoccur during secondary ageing at low temperatures (~20-65°C). This work has confirmed thatclustering and GP zone formation can modify the nature and distribution of precipitates that formwhen ageing is subsequently resumed at more elevated temperatures. Prospects for achievingfurther improvements in heat treatment schedules and alloy compositions to take greater advantageof secondary precipitation are also considered
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/13/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.519-521.283.pdf
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