Gradient cell–structured high-entropy alloy with exceptional strength and ductility
Abstract
We report that similar to conventional materials, most multicomponent high-entropy alloys (HEAs) lose ductility as they gain strength. In this study, we controllably introduced gradient nanoscaled dislocation cell structures in a stable single-phase HEA with face-centered cubic structure, thus resulting in enhanced strength without apparent loss of ductility. Upon application of strain, the sample-level structural gradient induces progressive formation of a high density of tiny stacking faults (SFs) and twins, nucleating from abundant low-angle dislocation cells. Furthermore, the SF-induced plasticity and the resultant refined structures, coupled with intensively accumulated dislocations, contribute to plasticity, increased strength, and work hardening. These findings offer a promising paradigm for tailoring properties with gradient dislocation cells at the nanoscale and advance our fundamental understanding of the intrinsic deformation behavior of HEAs.
- Authors:
-
[1];
[2];
[3];
[1];
[3];
[4];
[3];
[5];
[1]
- Chinese Academy of Sciences (CAS), Shenyang (China)
- Chinese Academy of Sciences (CAS), Shenyang (China); Univ. of Science and Technology of China, Shenyang
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Argonne National Lab. (ANL), Lemont, IL (United States)
- Univ. of Tennessee, Knoxville, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation of China; Frontier Science and International partnership; Youth Innovation Promotion Association; Chinese Academy of Sciences (CAS); LiaoNing Revitalization Talents Program; National Science Foundation (NSF); US Army Research Office
- OSTI Identifier:
- 1878719
- Alternate Identifier(s):
- OSTI ID: 1869780
- Grant/Contract Number:
- AC05-00OR22725; AC02-06CH11357; 51931010; 92163202; 52122104; 52071321; GJHZ2029; 2019196; XLYC1802026; DMR-1611180; DMR-1809640; W911NF-13-1-0438; W911NF-19-2-0049
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Science
- Additional Journal Information:
- Journal Volume: 374; Journal Issue: 6570; Journal ID: ISSN 0036-8075
- Publisher:
- AAAS
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; deformation; high entropy alloy
Citation Formats
Pan, Qingsong, Zhang, Liangxue, Feng, Rui, Lu, Qiuhong, An, Ke, Chuang, Andrew Chihpin, Poplawsky, Jonathan D., Liaw, Peter K., and Lu, Lei. Gradient cell–structured high-entropy alloy with exceptional strength and ductility. United States: N. p., 2021.
Web. doi:10.1126/science.abj8114.
Pan, Qingsong, Zhang, Liangxue, Feng, Rui, Lu, Qiuhong, An, Ke, Chuang, Andrew Chihpin, Poplawsky, Jonathan D., Liaw, Peter K., & Lu, Lei. Gradient cell–structured high-entropy alloy with exceptional strength and ductility. United States. https://doi.org/10.1126/science.abj8114
Pan, Qingsong, Zhang, Liangxue, Feng, Rui, Lu, Qiuhong, An, Ke, Chuang, Andrew Chihpin, Poplawsky, Jonathan D., Liaw, Peter K., and Lu, Lei. Thu .
"Gradient cell–structured high-entropy alloy with exceptional strength and ductility". United States. https://doi.org/10.1126/science.abj8114. https://www.osti.gov/servlets/purl/1878719.
@article{osti_1878719,
title = {Gradient cell–structured high-entropy alloy with exceptional strength and ductility},
author = {Pan, Qingsong and Zhang, Liangxue and Feng, Rui and Lu, Qiuhong and An, Ke and Chuang, Andrew Chihpin and Poplawsky, Jonathan D. and Liaw, Peter K. and Lu, Lei},
abstractNote = {We report that similar to conventional materials, most multicomponent high-entropy alloys (HEAs) lose ductility as they gain strength. In this study, we controllably introduced gradient nanoscaled dislocation cell structures in a stable single-phase HEA with face-centered cubic structure, thus resulting in enhanced strength without apparent loss of ductility. Upon application of strain, the sample-level structural gradient induces progressive formation of a high density of tiny stacking faults (SFs) and twins, nucleating from abundant low-angle dislocation cells. Furthermore, the SF-induced plasticity and the resultant refined structures, coupled with intensively accumulated dislocations, contribute to plasticity, increased strength, and work hardening. These findings offer a promising paradigm for tailoring properties with gradient dislocation cells at the nanoscale and advance our fundamental understanding of the intrinsic deformation behavior of HEAs.},
doi = {10.1126/science.abj8114},
journal = {Science},
number = 6570,
volume = 374,
place = {United States},
year = {Thu Sep 23 00:00:00 EDT 2021},
month = {Thu Sep 23 00:00:00 EDT 2021}
}
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