Microcompression study of Al-Nb nanoscale multilayers

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...

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Veröffentlicht in:Journal of materials research 2012-02, Vol.27 (3), p.592-598
Hauptverfasser: Kim, Youbin, Budiman, Arief Suriadi, Baldwin, J. Kevin, Mara, Nathan A., Misra, Amit, Han, Seung Min
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Sprache:eng
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Zusammenfassung: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.
ISSN:0884-2914
2044-5326
DOI:10.1557/jmr.2011.414