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|Title:||Effect of micro-structural changes on mechanical properties of La 66Al14(Cu, Ni)20 amorphous and crystalline alloys|
|Authors:||Zhang, Y. |
B. Mechanical properties at ambient temperature
C. Casting (including segregation)
|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.|
|Appears in Collections:||Staff Publications|
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