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Microstructure, elemental and phase composition and their influence on hydrophilic properties of rapidly solidified Al-In alloys

Tashlykova-Bushkevich I., Yakovenko J., Bushkevich I., Shepelevich V., Komsta H., Zukowski P.

Przegląd Elektrotechniczny

2018

R. 94, nr 4

122-125

The microstructure, elemental and phase composition of rapidly solidified foils of Al-In alloys were investigated using SEM with EDX, XRD and RBS. It was found that thin surface layers of foils are enriched with indium that results in hydrophilization of alloys. Wetting transition from the homogeneous Wenzel state to the heterogeneous Cassie-Baxter state observed when indium content increases at the foil surface of hydrophilic Al- In alloys is discussed in terms of the penetration of water into the micro/nanostructures of foil surfaces.

Na podstawie pomiarów SEM z EDX, XRD i RBS przeprowadzono badania składu pierwiastkowego, fazy i mikrostruktury szybko zestalonych powłok stopów Al-In. Stwierdzono, że cienkie warstwy powierzchniowe powłok wzbogacają się w ind, co powoduje hydrofilizację stopów. Przejście zawilgocenia z jednolitego stanu Wenzel do heterogenicznego stanu Cassie-Baxter, obserwowanego gdy następuje wzrost zawartości indu na powierzchni powłoki hydrofilowych stopów Al-In, zostało przeanalizowane pod kątem wnikania wody do powierzchniowych mikro i nano struktur powłoki.

High speed twin roll casting of 6016 aluminium alloy strip

Sakaguchi H., Haga T., Watari H., Kumai S.

Journal of Achievements in Materials and Manufacturing Engineering

2007

Vol. 20, nr 1-2

495-498

Purpose: of this paper is to clear the possibility of high speed roll casting of aluminium alloy strip. In the body of the automobiles, a sheet of 6016 aluminium alloy is adopted for the outer panel. Therefore, casting of 6016 was tried in this study. Characteristics of roll cast 6016 were investigated. Design/methodology/approach: was a high speed twin roll caster. The high speed twin roll caster was designed to overcome the low castability of the twin roll caster. Findings: are as below. 6016 alloy could be cast into the strip continuously at the speed of 60 m/min. The thickness of the strip was 3.4 mm. The microstructure at as-cast and after T4 heat treatment was shown. The microstructure was very fine. The mechanical properties were investigated by the tensile test and 180 degrees vending test. The as-cast strip could be cold rolled without homogenization to 1 mm. Result of tensile test was tensile strength was 230MPa, 0.2% proof stress was 118MPa and elongation was 33%. 6016 strip of T4 heat treatment could be bent 180 degrees without occurrence of crack at the outer surface or breaking. Research limitations/implications: is the width of the strip was 100 mm. It is necesarry to test twin roll caster equipped wide rolls. Practical implications: are as below. The mechanical properites of the roll-cast 6016 were enough for the sheet metal for the automobile. The low productivity of the twin roller caster could be improved. Originality/value: is that 6016 strip could be cast continuously at speed 60 m/min and this strip had good mechanical properties.