Effect of a controlled volume fraction of dendritic phases on tensile and compressive ductility in La-based metallic glass

TitleEffect of a controlled volume fraction of dendritic phases on tensile and compressive ductility in La-based metallic glass
Publication TypeJournal Article
Year of Publication2004
AuthorsLee, ML, Li, Y, Schuh, CA
JournalActa Materialia
Volume52
Issue14
Pagination4121 - 4131
Date Published2004/08/16/
Abstract

A systematic study has been carried out to identify the effect of crystalline second phase reinforcements on the mechanical properties of amorphous alloys based on the composition La86-yAl14(Cu, Ni)(y) (y = 1-24). By varying the composition in a controlled manner, composites with a tailorable fraction of in situ dendritic reinforcements were produced. Tension, compression and impact tests showed considerably improved mechanical properties with a large amount of plasticity when the reinforcement volume fraction exceeded a critical value near 40%, and the tension/compression asymmetry associated with glass plasticity is reduced as the volume fraction of crystalline reinforcements rises. (C) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.