On the formation, mechanical properties and crystallization behaviors of a Zr sub(56)Co sub(24)Al sub( 20) bulk metallic glass

An amorphous Zr sub(56)Co sub(24)Al sub( 20) alloy, prepared by water-cooled copper mold suction casting technique, showed high yield strength of approximately 2177 MPa and a pronounced plastic strain. Comparative research indicated that the compression strength and specific strength improved obviou...

Full description

Saved in:
Bibliographic Details
Published in:Journal of alloys and compounds 2015-10, Vol.647, p.204-208
Main Authors: Qin, X M, Tan, J, Li, C J, Wang, X C, Jiang, Y H, Zhou, R
Format: Article
Language:English
Subjects:
Alloys
Aluminum
Amorphous materials
Compressive strength
Crystallization
Liquids
Metallic glasses
Strength
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:An amorphous Zr sub(56)Co sub(24)Al sub( 20) alloy, prepared by water-cooled copper mold suction casting technique, showed high yield strength of approximately 2177 MPa and a pronounced plastic strain. Comparative research indicated that the compression strength and specific strength improved obviously with the increasing Al/Co ratio in Zr sub(56)Co sub(44-x)Al sub(x) (x = 12, 16 and 20) bulk metallic glasses (BMGs). Moreover, the width of the super-cooled liquid region increased, indicating a better thermal stability of the super-cooled liquid. However, more Al content enhanced the crystallization process and hence reduced the activation energy. This work might have some implications for designing high specific strength BMGs with high glass forming ability.
ISSN:0925-8388
DOI:10.1016/j.jallcom.2015.04.241