Microstructure of rapidly and uni-directionally solidified aluminum alloys

Effect of a weak transverse magnetic field on the microstructure in directionally solidified peritectic alloys

Effect of a weak transverse magnetic field on the microstructures in directionally solidified Fe-Ni and Pb-Bi peritectic alloys has been investigated experimentally. The results indicate that the magnetic field can induce the formation of banded and island-like structures and refine the primary phase in peritectic alloys. The above results are enhanced with increasing magnetic field. Furthermor...

Magnetomechanical performance of directionally solidified Fe–Ga alloys

Iron-gallium alloys can produce magnetostrictions of 400 ppm and might serve as mechanically robust actuator/sensing materials. However, for polycrystalline Fe–Ga alloys, the magnetostrictive performance decreases with the increasing deviations from the ideal 100 texture. In this paper, three directionally solidified Fe–Ga alloys with gallium contents of 17, 18.4, and 19.5 at. % were characteri...

Corrosion Resistance of Directionally Solidified Casting Zinc-Aluminum Matrix

MICROSTRUCTURE OF A RAPIDLY SOLIDIFIED Al-4V-2Fe ULTRAHIGH STRENGTH ALUMINUM ALLOY

Microstructure of a rapidly solidified Al-4V-2Fe alloy has been examined in detail by means of transmission electron microscopy and atom probe field ion microscopy. It is composed of a mixture of α-Al and amorphous phases. α-Al grains are relatively large (400 nm), but nanoscale domains of amorphous phase are trapped in the fcc grains. The interface between the α-Al and amorphous phases are ver...

Growth directions in directionally solidified Al–Zn and Zn–Al alloys near eutectic composition

Growth directions and crystallographic orientations of solidification microstructures have been measured in Al–Zn alloy near the eutectic composition. Al dendrites in Al–92 wt.% Zn alloy were found to grow along the h110i directions while Zn dendrites in Al– 96 and 98 wt.% Zn have h10 10i trunks. In the lamellar eutectic, a crystallographic relationship has been found between the dense plane of...