This paper describes original experimental results obtained in a study of the rheological behavior of amorphous bulk Vitralloy 1 (Zr41Ti14Cu12.5Ni10Be22.5), which shows linear viscous (Newtonian) flow over a certain range of deformation rates. These results were compared against results obtained for other superplastic alloys, and against results obtained for metal melts during the crystallization process. [ABSTRACT FROM AUTHOR]
Kravets, V. G., Portier, X., and Petford-Long, A. K.
Subjects
CRYSTALLIZATION, AMORPHOUS substances, ALLOYS, ANNEALING of metals, X-ray diffraction
Abstract
Crystallization of Co-rich amorphous alloys via thermal and laser annealing has been studied using X-ray diffraction and high resolution electron microscopy techniques. It has been found that microstructural properties of the resulting alloys can differ significantly for the two thermal treatments depending on their Co content. Co78Fe2Mn2Si9B9, Co72Fe8B20 and Co50Fe28Si10B12 amorphous alloys have been studied and only Co72Fe8B20 has shown very different crystallization processes after thermal and laser annealing. The results of comparative analysis of the influence of laser and thermal annealing on optical and structural properties of the samples are discussed. [ABSTRACT FROM AUTHOR]
This work studies the influence of the Ag admixtures on the crystallization of the amorphous Fe75Si9B16 alloy, with the aid of electric and magnetic measurements. It is concluded that the solid solubility of the Ag in these alloys is very small, reaching 2 at% at most. Because of microsegregation, the presence of even these minimal admixtures accelerates the crystallization procedure. [ABSTRACT FROM AUTHOR]