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New Twin-Roll Cast Al-Li Based Alloys for High-Strength Applications.
- Source :
- Metals (2075-4701); Aug2020, Vol. 10 Issue 8, p987, 1p
- Publication Year :
- 2020
-
Abstract
- Al-Li based alloys are attractive materials for the aerospace industry. The twin-roll casting of such materials could provide properties not achievable by conventional direct-chill casting and downstream processing methods due to significantly higher solidification rates. An Al-Li-Cu-Mg-Zr alloy was twin-roll cast with the same alloy containing a small addition of Sc. The microstructure of as-cast materials and the influence of Sc on the behavior of the alloy at elevated temperatures were studied by means of light and electron microscopy and by resistivity measurements. A fine-grained structure was formed during twin-roll casting, but several surface and internal defects were found on the strips, which should be suppressed by a further adjustment of the casting conditions. The addition of Sc had a positive effect on grain size uniformity and microstructure stabilization at elevated temperatures, as shown by the precipitation of a fine dispersion of coherent Sc- and Zr-containing precipitates. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20754701
- Volume :
- 10
- Issue :
- 8
- Database :
- Complementary Index
- Journal :
- Metals (2075-4701)
- Publication Type :
- Academic Journal
- Accession number :
- 145369686
- Full Text :
- https://doi.org/10.3390/met10080987