Dislocation mechanisms and 3D twin architectures generate exceptional strength-ductility-toughness combination in CrCoNi medium-entropy alloy
Abstract
Combinations of high strength and ductility are hard to attain in metals. Exceptions include materials exhibiting twinning-induced plasticity. To understand how the strength-ductility trade-off can be defeated, we apply in situ, and aberration-corrected scanning, transmission electron microscopy to examine deformation mechanisms in the medium-entropy alloy CrCoNi that exhibits one of the highest combinations of strength, ductility and toughness on record. Ab initio modelling suggests that it has negative stacking-fault energy at 0K and high propensity for twinning. With deformation we find that a three-dimensional (3D) hierarchical twin network forms from the activation of three twinning systems. This serves a dual function: conventional twin-boundary (TB) strengthening from blockage of dislocations impinging on TBs, coupled with the 3D twin network which offers pathways for dislocation glide along, and cross-slip between, intersecting TB-matrix interfaces. The stable twin architecture is not disrupted by interfacial dislocation glide, serving as a continuous source of strength, ductility and toughness.
- Authors:
-
[4];
[7]
- Zhejiang Univ., Hangzhou (China). Dept. of Materials Science and Engineering. Center of Electron Microscopy. State Key Lab. of Silicon Materials
- George Mason Univ., Fairfax, VA (United States). Dept. of Physics and Astronomy
- Xi'an Jiaotong Univ., Xi'an (China). Dept. of Materials Science and Engineering
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Sciences and Technology Division
- Zhejiang Univ., Hangzhou (China). Dept. of Materials Science and Engineering. Center of Electron Microscopy. State Key Lab. of Silicon Materials; Univ. of Pittsburgh, PA (United States). Dept. of Mechanical Engineering and Materials Science
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division; Univ. of California, Berkeley, CA (United States). Dept. of Materials Science and Engineering
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); State Key Program for Basic Research in China
- Contributing Org.:
- Univ. of California, Berkeley, CA (United States); Univ. of Pittsburgh, PA (United States); Xi'an Jiaotong Univ., Xi'an (China); George Mason Univ., Fairfax, VA (United States)
- OSTI Identifier:
- 1376451
- Alternate Identifier(s):
- OSTI ID: 1398464
- Grant/Contract Number:
- AC05-00OR22725; AC02-05CH11231; DMR-1611064; 2015CB65930
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nature Communications
- Additional Journal Information:
- Journal Volume: 8; Journal ID: ISSN 2041-1723
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Nanoscience and technology; Structural materials
Citation Formats
Zhang, Zijiao, Sheng, Hongwei, Wang, Zhangjie, Gludovatz, Bernd, Zhang, Ze, George, Easo P., Yu, Qian, Mao, Scott X., and Ritchie, Robert O. Dislocation mechanisms and 3D twin architectures generate exceptional strength-ductility-toughness combination in CrCoNi medium-entropy alloy. United States: N. p., 2017.
Web. doi:10.1038/ncomms14390.
Zhang, Zijiao, Sheng, Hongwei, Wang, Zhangjie, Gludovatz, Bernd, Zhang, Ze, George, Easo P., Yu, Qian, Mao, Scott X., & Ritchie, Robert O. Dislocation mechanisms and 3D twin architectures generate exceptional strength-ductility-toughness combination in CrCoNi medium-entropy alloy. United States. https://doi.org/10.1038/ncomms14390
Zhang, Zijiao, Sheng, Hongwei, Wang, Zhangjie, Gludovatz, Bernd, Zhang, Ze, George, Easo P., Yu, Qian, Mao, Scott X., and Ritchie, Robert O. Mon .
"Dislocation mechanisms and 3D twin architectures generate exceptional strength-ductility-toughness combination in CrCoNi medium-entropy alloy". United States. https://doi.org/10.1038/ncomms14390. https://www.osti.gov/servlets/purl/1376451.
@article{osti_1376451,
title = {Dislocation mechanisms and 3D twin architectures generate exceptional strength-ductility-toughness combination in CrCoNi medium-entropy alloy},
author = {Zhang, Zijiao and Sheng, Hongwei and Wang, Zhangjie and Gludovatz, Bernd and Zhang, Ze and George, Easo P. and Yu, Qian and Mao, Scott X. and Ritchie, Robert O.},
abstractNote = {Combinations of high strength and ductility are hard to attain in metals. Exceptions include materials exhibiting twinning-induced plasticity. To understand how the strength-ductility trade-off can be defeated, we apply in situ, and aberration-corrected scanning, transmission electron microscopy to examine deformation mechanisms in the medium-entropy alloy CrCoNi that exhibits one of the highest combinations of strength, ductility and toughness on record. Ab initio modelling suggests that it has negative stacking-fault energy at 0K and high propensity for twinning. With deformation we find that a three-dimensional (3D) hierarchical twin network forms from the activation of three twinning systems. This serves a dual function: conventional twin-boundary (TB) strengthening from blockage of dislocations impinging on TBs, coupled with the 3D twin network which offers pathways for dislocation glide along, and cross-slip between, intersecting TB-matrix interfaces. The stable twin architecture is not disrupted by interfacial dislocation glide, serving as a continuous source of strength, ductility and toughness.},
doi = {10.1038/ncomms14390},
journal = {Nature Communications},
number = ,
volume = 8,
place = {United States},
year = {Mon Feb 20 00:00:00 EST 2017},
month = {Mon Feb 20 00:00:00 EST 2017}
}
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- Entropy, Vol. 20, Issue 9
Elemental Phase Partitioning in the γ-γ″ Ni2CoFeCrNb0.15 High Entropy Alloy
journal, November 2018
- Han, Bin; Wei, Jie; He, Feng
- Entropy, Vol. 20, Issue 12
Development of Novel Lightweight Dual-Phase Al-Ti-Cr-Mn-V Medium-Entropy Alloys with High Strength and Ductility
journal, January 2020
- Liao, Yu-Chin; Chen, Po-Sung; Li, Chao-Hsiu
- Entropy, Vol. 22, Issue 1
Influence of Annealing on Microstructure and Mechanical Properties of a Nanocrystalline CrCoNi Medium-Entropy Alloy
journal, April 2018
- Schuh, Benjamin; Völker, Bernhard; Todt, Juraj
- Materials, Vol. 11, Issue 5
Generalized Stacking Fault Energy of Al-Doped CrMnFeCoNi High-Entropy Alloy
journal, December 2019
- Sun, Xun; Zhang, Hualei; Li, Wei
- Nanomaterials, Vol. 10, Issue 1
‘Unzipping’ of twin lamella in nanotwinned nickel nanowires under flexural bending
text, January 2017
- Wang, Binjun; Zhang, Hongti; Lou, Jun
- Figshare
‘Unzipping’ of twin lamella in nanotwinned nickel nanowires under flexural bending
journal, October 2017
- Wang, Binjun; Zhang, Hongti; Lou, Jun
- Materials Research Letters, Vol. 6, Issue 1
Influence of Annealing on Microstructure and Mechanical Properties of a Nanocrystalline CrCoNi Medium-Entropy Alloy
text, January 2018
- Schuh, Benjamin; Völker, Bernhard; Todt, Juraj
- Deutsches Elektronen-Synchrotron, DESY, Hamburg
‘Unzipping’ of twin lamella in nanotwinned nickel nanowires under flexural bending
text, January 2017
- Wang, Binjun; Zhang, Hongti; Lou, Jun
- Figshare
Pseudo-binary and pseudo-ternary diffusion couple methods for estimation of the diffusion coefficients in multicomponent systems and high entropy alloys
text, January 2019
- Esakkiraja, Neelamegan; Pandey, Keerti; Dash, Anuj
- Taylor & Francis
Pseudo-binary and pseudo-ternary diffusion couple methods for estimation of the diffusion coefficients in multicomponent systems and high entropy alloys
text, January 2019
- Esakkiraja, Neelamegan; Pandey, Keerti; Dash, Anuj
- Taylor & Francis
Tunable stacking fault energies by tailoring local chemical order in CrCoNi medium-entropy alloys
text, January 2018
- Ding, Jun; Yu, Qin; Asta, Mark
- arXiv
Strengthening in multi-principal element alloys with local-chemical-order roughened dislocation pathways
text, January 2019
- Li, Qing-Jie; Sheng, Howard; Ma, Evan
- arXiv
Crystallographically degenerate B2 precipitation in a plastically deformed fcc-based complex concentrated alloy
text, January 2018
- Choudhuri, Deep; Shukla, Shivakant; Green, Whitley B.
- Taylor & Francis
Twinning-induced strain hardening in dual-phase FeCoCrNiAl0.5 at room and cryogenic temperature
journal, July 2018
- Bönisch, M.; Wu, Y.; Sehitoglu, H.
- Scientific Reports, Vol. 8, Issue 1
Stacking Fault Energy Analyses of Additively Manufactured Stainless Steel 316L and CrCoNi Medium Entropy Alloy Using In Situ Neutron Diffraction
journal, January 2020
- Woo, W.; Jeong, J. S.; Kim, D. -K.
- Scientific Reports, Vol. 10, Issue 1
Dynamically reinforced heterogeneous grain structure prolongs ductility in a medium-entropy alloy with gigapascal yield strength
journal, June 2018
- Yang, Muxin; Yan, Dingshun; Yuan, Fuping
- Proceedings of the National Academy of Sciences, Vol. 115, Issue 28
Influence of Annealing on Microstructure and Mechanical Properties of a Nanocrystalline CrCoNi Medium-Entropy Alloy
text, January 2018
- Schuh, Benjamin; Völker, Bernhard; Todt, Juraj
- Deutsches Elektronen-Synchrotron, DESY, Hamburg