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Title: High-velocity deformation of Al 0.3CoCrFeNi high-entropy alloy: Remarkable resistance to shear failure

Abstract

Here, the mechanical behavior of a single phase (fcc) Al 0.3CoCrFeNi high-entropy alloy (HEA) was studied in the low and high strain-rate regimes. The combination of multiple strengthening mechanisms such as solid solution hardening, forest dislocation hardening, as well as mechanical twinning leads to a high work hardening rate, which is significantly larger than that for Al and is retained in the dynamic regime. The resistance to shear localization was studied by dynamically-loading hat-shaped specimens to induce forced shear localization. However, no adiabatic shear band could be observed. It is therefore proposed that the excellent strain hardening ability gives rise to remarkable resistance to shear localization, which makes this material an excellent candidate for penetration protection applications such as armors.

Authors:
 [1];  [1];  [2];  [2];  [1]
  1. Univ. of California, San Diego, CA (United States). Materials Science and Engineering Program
  2. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering
Publication Date:
Research Org.:
Univ. of California, San Diego, CA (United States)
Sponsoring Org.:
USDOE Office of Fossil Energy (FE); USDOE National Nuclear Security Administration (NNSA); US Army Research Office (ARO); National Science Foundation (NSF)
Contributing Org.:
National Energy Technology Laboratory
OSTI Identifier:
1366535
Grant/Contract Number:  
NA0002080; FE0008855; FE0024054; FE0011194
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 7; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Mechanical properties; Metals and alloys

Citation Formats

Li, Z., Zhao, S., Diao, H., Liaw, P. K., and Meyers, M. A. High-velocity deformation of Al0.3CoCrFeNi high-entropy alloy: Remarkable resistance to shear failure. United States: N. p., 2017. Web. doi:10.1038/srep42742.
Li, Z., Zhao, S., Diao, H., Liaw, P. K., & Meyers, M. A. High-velocity deformation of Al0.3CoCrFeNi high-entropy alloy: Remarkable resistance to shear failure. United States. doi:10.1038/srep42742.
Li, Z., Zhao, S., Diao, H., Liaw, P. K., and Meyers, M. A. Fri . "High-velocity deformation of Al0.3CoCrFeNi high-entropy alloy: Remarkable resistance to shear failure". United States. doi:10.1038/srep42742. https://www.osti.gov/servlets/purl/1366535.
@article{osti_1366535,
title = {High-velocity deformation of Al0.3CoCrFeNi high-entropy alloy: Remarkable resistance to shear failure},
author = {Li, Z. and Zhao, S. and Diao, H. and Liaw, P. K. and Meyers, M. A.},
abstractNote = {Here, the mechanical behavior of a single phase (fcc) Al0.3CoCrFeNi high-entropy alloy (HEA) was studied in the low and high strain-rate regimes. The combination of multiple strengthening mechanisms such as solid solution hardening, forest dislocation hardening, as well as mechanical twinning leads to a high work hardening rate, which is significantly larger than that for Al and is retained in the dynamic regime. The resistance to shear localization was studied by dynamically-loading hat-shaped specimens to induce forced shear localization. However, no adiabatic shear band could be observed. It is therefore proposed that the excellent strain hardening ability gives rise to remarkable resistance to shear localization, which makes this material an excellent candidate for penetration protection applications such as armors.},
doi = {10.1038/srep42742},
journal = {Scientific Reports},
number = ,
volume = 7,
place = {United States},
year = {2017},
month = {2}
}

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Cited by: 4 works
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    Works referencing / citing this record:

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