Journal
JOURNAL OF MATERIALS RESEARCH
Volume 27, Issue 3, Pages 592-598Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1557/jmr.2011.414
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Funding
- National Research Foundation of Korea [4.0007357, N01110283]
- KINC at KAIST [N10110033]
- DOE, Office of Science, Office of Basic Energy Sciences, Division of Materials Science and Engineering
- Los Alamos National Laboratory (LANL) [LDRD/X93V]
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Microcompression tests were performed on the Al/Nb multilayers of incoherent interfaces with the layer thicknesses of 5 nm Al/5 nm Nb and 50 nm Al/50 nm Nb. The Al-Nb multilayers showed increase in strength as the layer thickness was reduced; the average flow stresses at 5% plastic strain from the 5 nm Al/5 nm Nb and 50 nm Al/50 nm Nb layer thickness specimens were determined to be 2.1 GPa and 1.4 GPa respectively. The results from this Al-Nb microcompression study were compared with those of the previous report on Cu-Nb multilayer microcompression results that indicated that the flow stresses of the Al-Nb multilayer are lower than those of Cu-Nb with the same bilayer spacing. The observed difference in strength was attributed to a potential difference in the interfacial strength of the two incoherent multilayer systems.
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