Effect of scandium on the microstructure and ageing behaviour of cast Al-6Mg alloy

Journal Article · Sat Nov 15 00:00:00 EST 2008 · Materials Characterization

DOI:https://doi.org/10.1016/j.matchar.2008.03.006· OSTI ID:21137485

Kaiser, M S ^[1]; Datta, S ^[2]; Banerjee, M K ^[3]

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1. Bangladesh University of Engineering and Technology, Dhaka-1000 (Bangladesh)
2. Bengal Engineering and Science University, Shibpur, Howrah 711 103 (India)
3. National Institute of Foundry and Forge Technology, Ranchi 834003 (India)

Microstructural modification and grain refinement due to addition of scandium in Al-6Mg alloy has been studied. Transmission electron microscopy is used to understand the microstructure and precipitation behaviour in Al-6Mg alloy doped with scandium. It is seen from the microstructure that the dendrites of the cast Al-6Mg alloy have been refined significantly due to addition of scandium. Increasing amount of scandium leads to a greater dendrite refinement. The age hardening effect in scandium added Al-6Mg alloys has been studied by subjecting the alloys containing varying amount of scandium ranging from 0.2 wt.% to 0.6 wt.% to isochronal and isothermal ageing at various temperatures for different times. It is observed that significant hardening takes place in the aged alloys due to the precipitation of scandium aluminides.

• OSTI ID: 21137485
• Journal Information: Materials Characterization, Vol. 59, Issue 11; Other Information: DOI: 10.1016/j.matchar.2008.03.006; PII: S1044-5803(08)00100-9; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 1044-5803
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AGE HARDENING
AGING
ALUMINIUM ALLOYS
DENDRITES
DOPED MATERIALS
GRAIN REFINEMENT
MAGNESIUM ALLOYS
MICROSTRUCTURE
PRECIPITATION
SCANDIUM
TRANSMISSION ELECTRON MICROSCOPY