Phase-Transformation Ductilization of Brittle High-Entropy Alloys via Metastability Engineering
Abstract
High-entropy alloys (HEAs) in which interesting physical, chemical, and structural properties are being continuously revealed have recently attracted extensive attention. Body-centered cubic (bcc) HEAs, particularly those based on refractory elements are promising for high-temperature application but generally fail by early cracking with limited plasticity at room temperature, which limits their malleability and widespread uses. In this paper, the “metastability-engineering” strategy is exploited in brittle bcc HEAs via tailoring the stability of the constituent phases, and transformation-induced ductility and work-hardening capability are successfully achieved. Finally, this not only sheds new insights on the development of HEAs with excellent combination of strength and ductility, but also has great implications on overcoming the long-standing strength–ductility tradeoff of metallic materials in general.
- Authors:
-
- Univ. of Science and Technology Beijing (China). State Key Lab. for Advanced Metals and Materials
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Sciences Directorate. Chemical and Engineering Materials Division
- Publication Date:
- Research Org.:
- University of Science and Technology Beijing (China); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); National Natural Science Foundation of China (NSFC); International S&T Cooperation Program of China; Program for Changjiang Scholars and Innovative Research Team in University (China); Fundamental Research Fund for the Central Universities (China)
- OSTI Identifier:
- 1364323
- Alternate Identifier(s):
- OSTI ID: 1374089
- Grant/Contract Number:
- AC05-00OR22725; 51531001; 51671018; 51422101; 51371003; B07003; 2015DFG52600; IRT_14R05; FRF-TP-15-004C1
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Advanced Materials
- Additional Journal Information:
- Journal Volume: 29; Journal Issue: 30; Journal ID: ISSN 0935-9648
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; ductilization; high-entropy alloys; metastability engineering; phase transformations
Citation Formats
Huang, Hailong, Wu, Yuan, He, Junyang, Wang, Hui, Liu, Xiongjun, An, Ke, Wu, Wei, and Lu, Zhaoping. Phase-Transformation Ductilization of Brittle High-Entropy Alloys via Metastability Engineering. United States: N. p., 2017.
Web. doi:10.1002/adma.201701678.
Huang, Hailong, Wu, Yuan, He, Junyang, Wang, Hui, Liu, Xiongjun, An, Ke, Wu, Wei, & Lu, Zhaoping. Phase-Transformation Ductilization of Brittle High-Entropy Alloys via Metastability Engineering. United States. https://doi.org/10.1002/adma.201701678
Huang, Hailong, Wu, Yuan, He, Junyang, Wang, Hui, Liu, Xiongjun, An, Ke, Wu, Wei, and Lu, Zhaoping. Wed .
"Phase-Transformation Ductilization of Brittle High-Entropy Alloys via Metastability Engineering". United States. https://doi.org/10.1002/adma.201701678. https://www.osti.gov/servlets/purl/1364323.
@article{osti_1364323,
title = {Phase-Transformation Ductilization of Brittle High-Entropy Alloys via Metastability Engineering},
author = {Huang, Hailong and Wu, Yuan and He, Junyang and Wang, Hui and Liu, Xiongjun and An, Ke and Wu, Wei and Lu, Zhaoping},
abstractNote = {High-entropy alloys (HEAs) in which interesting physical, chemical, and structural properties are being continuously revealed have recently attracted extensive attention. Body-centered cubic (bcc) HEAs, particularly those based on refractory elements are promising for high-temperature application but generally fail by early cracking with limited plasticity at room temperature, which limits their malleability and widespread uses. In this paper, the “metastability-engineering” strategy is exploited in brittle bcc HEAs via tailoring the stability of the constituent phases, and transformation-induced ductility and work-hardening capability are successfully achieved. Finally, this not only sheds new insights on the development of HEAs with excellent combination of strength and ductility, but also has great implications on overcoming the long-standing strength–ductility tradeoff of metallic materials in general.},
doi = {10.1002/adma.201701678},
journal = {Advanced Materials},
number = 30,
volume = 29,
place = {United States},
year = {Wed Jun 07 00:00:00 EDT 2017},
month = {Wed Jun 07 00:00:00 EDT 2017}
}
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Figures / Tables:
Figure 1: XRD patterns and EBSD images of the as-cast TaxHfZrTi (x=1, 0.6, 0.5, and 0.4) HEAs. The Ta concentration significantly influences the phase constitution of this alloys system, rendering either single (bcc) or dual-phase (bcc + hcp) structure. The decreasing of Ta content destabilizes the bcc matrix and promotesmore »
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