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Title: Design of bicontinuous metallic nanocomposites for high-strength and plasticity

Abstract

We demonstrate design of Cu/Mo nanocomposite thin films with bicontinuous intertwined morphologies for high strength and plastic deformability. Through co-sputtering Cu and Mo at different temperatures, nanocomposites with lateral and random concentration modulations (LCMs and RCMs) were fabricated. Ligament size and coherency of the Cu/Mo interfaces was also controlled via the deposition conditions. It was discovered that nanocomposites with LCM structure and coherent interfaces have high strength but limited deformability. Enhanced deformability was achieved when the interface was altered to semi-coherent, although plasticity was localized in kink bands. The RCM structure design with semi-coherent interfaces showed an excellent combination of high flow strength and plastic deformability due to suppression of shear and kink bands.

Authors:
ORCiD logo [1];  [1]; ORCiD logo [2];  [1]
  1. Univ. of Michigan, Ann Arbor, MI (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1558982
Report Number(s):
LA-UR-19-27345
Journal ID: ISSN 0264-1275; TRN: US2000273
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Accepted Manuscript
Journal Name:
Materials & Design
Additional Journal Information:
Journal Volume: 166; Journal Issue: C; Journal ID: ISSN 0264-1275
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Nanostructure design; Metallic nanocomposite; High-strength; Plastic deformability; In situ nanomechanics

Citation Formats

Cui, Yuchi, Derby, Benjamin, Li, Nan, and Misra, Amit. Design of bicontinuous metallic nanocomposites for high-strength and plasticity. United States: N. p., 2019. Web. doi:10.1016/j.matdes.2019.107602.
Cui, Yuchi, Derby, Benjamin, Li, Nan, & Misra, Amit. Design of bicontinuous metallic nanocomposites for high-strength and plasticity. United States. https://doi.org/10.1016/j.matdes.2019.107602
Cui, Yuchi, Derby, Benjamin, Li, Nan, and Misra, Amit. Fri . "Design of bicontinuous metallic nanocomposites for high-strength and plasticity". United States. https://doi.org/10.1016/j.matdes.2019.107602. https://www.osti.gov/servlets/purl/1558982.
@article{osti_1558982,
title = {Design of bicontinuous metallic nanocomposites for high-strength and plasticity},
author = {Cui, Yuchi and Derby, Benjamin and Li, Nan and Misra, Amit},
abstractNote = {We demonstrate design of Cu/Mo nanocomposite thin films with bicontinuous intertwined morphologies for high strength and plastic deformability. Through co-sputtering Cu and Mo at different temperatures, nanocomposites with lateral and random concentration modulations (LCMs and RCMs) were fabricated. Ligament size and coherency of the Cu/Mo interfaces was also controlled via the deposition conditions. It was discovered that nanocomposites with LCM structure and coherent interfaces have high strength but limited deformability. Enhanced deformability was achieved when the interface was altered to semi-coherent, although plasticity was localized in kink bands. The RCM structure design with semi-coherent interfaces showed an excellent combination of high flow strength and plastic deformability due to suppression of shear and kink bands.},
doi = {10.1016/j.matdes.2019.107602},
journal = {Materials & Design},
number = C,
volume = 166,
place = {United States},
year = {2019},
month = {1}
}

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Works referencing / citing this record:

3-D phase-field simulations of self-organized composite morphologies in physical vapor deposited phase-separating binary alloys
journal, August 2019

  • Ankit, Kumar; Derby, Benjamin; Raghavan, Rahul
  • Journal of Applied Physics, Vol. 126, Issue 7
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