Microcompression study of Al-Nb nanoscale multilayers

Youbin Kim, Arief Suriadi Budiman, J. Kevin Baldwin, Nathan A. Mara, Amit Misra, Seung Min Han

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)592-598
Number of pages7
JournalJournal of Materials Research
Volume27
Issue number3
DOIs
StatePublished - Feb 14 2012

Keywords

  • Layered
  • Nanoscale
  • Strength

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