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Title: Effects of three-dimensional Cu/Nb interfaces on strengthening and shear banding in nanoscale metallic multilayers

Abstract

Manipulation of the atomic-scale structure of two-dimensional (2D) interfaces have been shown to provide nanocomposites with enhanced strength, deformability, and radiation damage resistance. In comparison with 2D interfaces, here we investigate the mechanical response of nanocomposites containing three-dimensional (3D) Cu/Nb interfaces consisting of a chemical/structural gradient separating pure Cu and Nb layers, through which the lattice mismatch between face-centered cubic Cu and body-centered cubic Nb is accommodated over a distance of several nanometers. Furthermore, it is demonstrated that 3D interfaces increase the yield and flow strength by 50% and 22%, respectively, over composites containing 2D interfaces at similar layer thicknesses. After 14% compressive strain, the onset of shear banding results in co-deformation of both Cu and Nb phases within and outside of the shear band. We conclude with a discussion of the role of interface structure in shear band formation and growth in 3D Cu/Nb.

Authors:
 [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [3]; ORCiD logo [2];  [4];  [5];  [5]
  1. Univ. of North Carolina, Charlotte, NC (United States); Univ. of Minnesota, Minneapolis, MN (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Center for Integrated Nanotechnologies (CINT)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. Univ. of California, Santa Barbara, CA (United States)
  5. Univ. of Minnesota, Minneapolis, MN (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); USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1657139
Alternate Identifier(s):
OSTI ID: 1658416
Report Number(s):
LA-UR-20-24126
Journal ID: ISSN 1359-6454
Grant/Contract Number:  
89233218CNA000001; SC0020133
Resource Type:
Accepted Manuscript
Journal Name:
Acta Materialia
Additional Journal Information:
Journal Volume: 199; Journal ID: ISSN 1359-6454
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 3-dimensional interface; shear banding; nanocomposites

Citation Formats

Chen, Y., Li, N., Hoagland, R. G., Liu, X. -Y., Baldwin, J. K., Beyerlein, I. J., Cheng, J. Y., and Mara, N. A.. Effects of three-dimensional Cu/Nb interfaces on strengthening and shear banding in nanoscale metallic multilayers. United States: N. p., 2020. Web. https://doi.org/10.1016/j.actamat.2020.08.019.
Chen, Y., Li, N., Hoagland, R. G., Liu, X. -Y., Baldwin, J. K., Beyerlein, I. J., Cheng, J. Y., & Mara, N. A.. Effects of three-dimensional Cu/Nb interfaces on strengthening and shear banding in nanoscale metallic multilayers. United States. https://doi.org/10.1016/j.actamat.2020.08.019
Chen, Y., Li, N., Hoagland, R. G., Liu, X. -Y., Baldwin, J. K., Beyerlein, I. J., Cheng, J. Y., and Mara, N. A.. Thu . "Effects of three-dimensional Cu/Nb interfaces on strengthening and shear banding in nanoscale metallic multilayers". United States. https://doi.org/10.1016/j.actamat.2020.08.019.
@article{osti_1657139,
title = {Effects of three-dimensional Cu/Nb interfaces on strengthening and shear banding in nanoscale metallic multilayers},
author = {Chen, Y. and Li, N. and Hoagland, R. G. and Liu, X. -Y. and Baldwin, J. K. and Beyerlein, I. J. and Cheng, J. Y. and Mara, N. A.},
abstractNote = {Manipulation of the atomic-scale structure of two-dimensional (2D) interfaces have been shown to provide nanocomposites with enhanced strength, deformability, and radiation damage resistance. In comparison with 2D interfaces, here we investigate the mechanical response of nanocomposites containing three-dimensional (3D) Cu/Nb interfaces consisting of a chemical/structural gradient separating pure Cu and Nb layers, through which the lattice mismatch between face-centered cubic Cu and body-centered cubic Nb is accommodated over a distance of several nanometers. Furthermore, it is demonstrated that 3D interfaces increase the yield and flow strength by 50% and 22%, respectively, over composites containing 2D interfaces at similar layer thicknesses. After 14% compressive strain, the onset of shear banding results in co-deformation of both Cu and Nb phases within and outside of the shear band. We conclude with a discussion of the role of interface structure in shear band formation and growth in 3D Cu/Nb.},
doi = {10.1016/j.actamat.2020.08.019},
journal = {Acta Materialia},
number = ,
volume = 199,
place = {United States},
year = {2020},
month = {10}
}

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This content will become publicly available on October 1, 2021
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