Devitrification-induced an Ultrahigh Strength Al-based Composite Maintaining Ductility

A new Al-based composite consisting of submicron-sized α-Al matrix embedded with precipitated intermetallic phases was developed by controlling the devitrification process of an Al-Ni-Y-Co-La amorphous alloy.Such a homogeneous composite structure presented an ultrahigh strength of about 1.34 GPa and...

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Bibliographic Details
Published in:Journal of materials science & technology 2015-05, Vol.31 (5), p.489-492
Main Authors: Kan, Dong, Li, Xiaopeng, Yang, Baijun, Yang, Hongwang, Wang, Jianqiang
Format: Article
Language:English
Subjects:
Al-rich
Al-rich metallic glass
Aluminum
Aluminum base alloys
Composite
Compressive strength
Devitrification
Dislocations
glass
Devitrification
Composite
M
Intermetallic phases
Mechanical properties
metallic
Plastic deformation
Strength
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Summary:A new Al-based composite consisting of submicron-sized α-Al matrix embedded with precipitated intermetallic phases was developed by controlling the devitrification process of an Al-Ni-Y-Co-La amorphous alloy.Such a homogeneous composite structure presented an ultrahigh strength of about 1.34 GPa and a large compressive plastic strain up to 22%.The unique mechanical properties during compression are mainly attributed to the dislocation slip deformation of ductile a-AI matrix and the shear-induced refinement of strengthening intermetallic phases.
ISSN:1005-0302
1941-1162
DOI:10.1016/j.jmst.2014.07.022