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Microcompression study of Al-Nb nanoscale multilayers

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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.

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Acknowledgments

The research at KAIST was supported by National Research Foundation of Korea under the Contract Nos. 4.0007357, N01110283, and the KINC grant at KAIST under the Contract No. N10110033. LANL authors acknowledge support from DOE, Office of Science, Office of Basic Energy Sciences, Division of Materials Science and Engineering. A.S.B. is supported by the Director, Los Alamos National Laboratory (LANL), under the Director’s Postdoctoral Research Fellowship program (LDRD/X93V).

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Authors and Affiliations

  1. Graduate School of EEWS, Korea Advanced Institute of Science and Technology, Yuseong Gu, Daejeon, 35-701, Korea

    Youbin Kim & Arief B. Suriadiudiman

  2. Center for Integrated Nanotechnologies (CINT), Los Alamos National Laboratory (LANL), Los Alamos, New Mexico, 87545, USA

    J.Kevin Baldwin, Nathan A. Mara, Amit Misra & Seung Min Han

Authors
  1. Youbin Kim
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  2. Arief B. Suriadiudiman
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  3. J.Kevin Baldwin
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  4. Nathan A. Mara
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  5. Amit Misra
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Correspondence to Seung Min Han.

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This author was an editor of this focus issue during the review and decision stage. For the JMR policy on review and publication of manuscripts authored by editors, please refer to http://www.mrs.org/jmr-editor-manuscripts/.

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Kim, Y., Suriadiudiman, A.B., Baldwin, J. et al. Microcompression study of Al-Nb nanoscale multilayers. Journal of Materials Research 27, 592–598 (2012). https://doi.org/10.1557/jmr.2011.414

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