Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.internet.2004.04.008
Title: Effect of micro-structural changes on mechanical properties of La 66Al14(Cu, Ni)20 amorphous and crystalline alloys
Authors: Zhang, Y. 
Lee, M.L.
Tan, H. 
Jing, Q. 
Li, Y. 
Keywords: A. Composites
B. Mechanical properties at ambient temperature
C. Casting (including segregation)
D. Microstructure
Issue Date: Oct-2004
Citation: Zhang, Y.,Lee, M.L.,Tan, H.,Jing, Q.,Li, Y. (2004-10). Effect of micro-structural changes on mechanical properties of La 66Al14(Cu, Ni)20 amorphous and crystalline alloys. Intermetallics 12 (10-11 SPEC. ISS.) : 1279-1283. ScholarBank@NUS Repository. https://doi.org/10.1016/j.internet.2004.04.008
Abstract: The micro-structures and phase selections of La66Al 14(Cu, Ni)20 alloy were studied by Bridgman solidifications with withdraw velocity V between 0.008 and 4.8 mm/s. Composites of α-La dendrites in amorphous matrix or in micro- and nano-sized eutectic matrix were formed with different cooling rates. The volume percent of the dendrite phase reaches a maximum at the cooling rate of about 15 K/s, while the dendritic secondary arm spacing λ2 decreases from 4.3 to 0.6 μm with the increase in the cooling rate, and obeys the equation of λ2V0.57 = 19 μm1.57s-0.57. The compression strength, as well as the elastic strain limit of the dendrite/amorphous composite are 600 MPa and 2.3%, respectively. Improved ductility was observed for the amorphous matrix composites with high volume percent of dendrite phase which are obtained by slow cooling rate. © 2004 Elsevier Ltd. All rights reserved.
Source Title: Intermetallics
URI: http://scholarbank.nus.edu.sg/handle/10635/114433
ISSN: 09669795
DOI: 10.1016/j.internet.2004.04.008
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