4.7 Article

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

期刊

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
卷 31, 期 5, 页码 489-492

出版社

JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2014.07.022

关键词

Al-rich metallic glass; Devitrification; Composite; Mechanical properties

资金

  1. National Natural Science Foundation of China [51131006, 51071151]

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A new Al-based composite consisting of submicron-sized alpha-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 alpha-Al matrix and the shear-induced refinement of strengthening intermetallic phases. Copyright (C) 2015, The editorial office of Journal of Materials Science & Technology. Published by Elsevier Limited. All rights reserved.

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