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- Title
Effect of trace Sr and Sc contents and ultrasonic vibration on the microstructure and mechanical properties of the A380 alloy.
- Authors
Jiping Lei; Jianwu Yu; Jianmei Chen; Chengbo Li; Hong Luo; Zifu Li
- Abstract
The effect and mechanism of trace amounts of Sr and Sc in the A380 alloy under ultrasonic vibration (ultraviolet) modification on the microstructure and mechanical properties were investigated. The results showed that the primary a phase in A380 could be refined by adding Sr and Sc under ultraviolet treatment, the secondary dendrite spacing decreased significantly, and the thick dendritic shapes transformed to tiny disperse isometric crystals. The highest ultimate tensile strength (about 302 MPa) was obtained by adding 0.2 Sr+0.4 Sc (wt%) and applying ultraviolet treatment. The highest hardness (about 113BHN) and elongation (about 4.65%) were obtained by adding 0.15% Sr+0.3% Sc and applying ultraviolet treatment, and the minimum grain size (about 27mm) and maximum shape factor (around 0.8) were obtained for the same composition.
- Subjects
STRONTIUM; SCANDIUM; MICROSTRUCTURE; MECHANICAL properties of metals; ALUMINUM alloys
- Publication
Advances in Mechanical Engineering (Sage Publications Inc.), 2018, Vol 10, Issue 5, p1
- ISSN
1687-8132
- Publication type
Article
- DOI
10.1177/1687814018775172