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Indexed by:期刊论文
Date of Publication:2019-09-15
Journal:JOURNAL OF ALLOYS AND COMPOUNDS
Included Journals:SCIE、EI
Volume:801
Page Number:175-180
ISSN No.:0925-8388
Key Words:Composites; Bulk metallic glasses; Mechanical properties; Plasticity; Dendrites; beta-phase
Abstract:The variations of structure and mechanical properties with sample diameter (d) for ZrAlCuNi alloys containing a high Zr content of 73 at.% were investigated. A Zr73Al8Cu6Ni13 alloy forms a single glassy phase with a d of 1.0 mm and changes to a composite of beta-Zr dendrites dispersing homogeneously in metallic glass matrix when the d increases to 1.5-3.0 mm. The Zr73Al8Cu6Ni13 bulk metallic glass composites (BMGCs) exhibit high compressive plastic strain of over 35% without final failure, superior to that of 4.5% for the phi 1.0 mm bulk metallic glass (BMG) sample, and the yield strength of similar to 1510 MPa is comparable to the BMG. The mechanisms of formation of the beta-Zr dendrites and plasticity improvement of the BMGCs were also discussed. (C) 2019 Elsevier B.V. All rights reserved.