Fracture resistance of high entropy alloys: A review
Abstract
Fascinated by the exceptional mechanical properties of high entropy alloys (HEAs), unremitting endeavors are placed on accelerating their engineering applications in multiple critical fields. As all other structural materials, attaining sufficient fracture resistance is a vital requirement for HEAs, particularly for safety critical applications. Along this line, the fracture resistance of a number of HEAs and medium-entropy alloys (MEAs) had been studied in the past decade. While some exhibit unprecedented fracture toughness akin to the toughest materials ever known, others are just alike brittle materials. Herein, we summarize one decade of investigations of the fracture resistance of HEAs and MEAs, including the characterization of fracture toughness, disclosure of fractographic characteristics, and understanding of fracture micro-mechanisms. The role of alloy composition, temperature, phase constituent, and characterization techniques in altering the fracture toughness are discussed; characteristics of the cleavage and shear fractures are detailed; toughening and weakening mechanisms, from the atomic to the defect level, are reviewed. In conclusion, some key questions are raised, and the directions for future research are suggested.
- Authors:
-
- Wuhan Univ. of Technology, Wuhan (China); Univ. of Tennessee, Knoxville, TN (United States)
- Univ. of Tennessee, Knoxville, TN (United States)
- Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1543239
- Alternate Identifier(s):
- OSTI ID: 1530646
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Intermetallics
- Additional Journal Information:
- Journal Volume: 99; Journal Issue: C; Journal ID: ISSN 0966-9795
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Fracture toughness; Fractography; Fracture micromechanism; Temperature effect; Toughening; Strength-toughness conflict
Citation Formats
Li, Weidong, Liaw, Peter K., and Gao, Yanfei. Fracture resistance of high entropy alloys: A review. United States: N. p., 2018.
Web. doi:10.1016/j.intermet.2018.05.013.
Li, Weidong, Liaw, Peter K., & Gao, Yanfei. Fracture resistance of high entropy alloys: A review. United States. https://doi.org/10.1016/j.intermet.2018.05.013
Li, Weidong, Liaw, Peter K., and Gao, Yanfei. Tue .
"Fracture resistance of high entropy alloys: A review". United States. https://doi.org/10.1016/j.intermet.2018.05.013. https://www.osti.gov/servlets/purl/1543239.
@article{osti_1543239,
title = {Fracture resistance of high entropy alloys: A review},
author = {Li, Weidong and Liaw, Peter K. and Gao, Yanfei},
abstractNote = {Fascinated by the exceptional mechanical properties of high entropy alloys (HEAs), unremitting endeavors are placed on accelerating their engineering applications in multiple critical fields. As all other structural materials, attaining sufficient fracture resistance is a vital requirement for HEAs, particularly for safety critical applications. Along this line, the fracture resistance of a number of HEAs and medium-entropy alloys (MEAs) had been studied in the past decade. While some exhibit unprecedented fracture toughness akin to the toughest materials ever known, others are just alike brittle materials. Herein, we summarize one decade of investigations of the fracture resistance of HEAs and MEAs, including the characterization of fracture toughness, disclosure of fractographic characteristics, and understanding of fracture micro-mechanisms. The role of alloy composition, temperature, phase constituent, and characterization techniques in altering the fracture toughness are discussed; characteristics of the cleavage and shear fractures are detailed; toughening and weakening mechanisms, from the atomic to the defect level, are reviewed. In conclusion, some key questions are raised, and the directions for future research are suggested.},
doi = {10.1016/j.intermet.2018.05.013},
journal = {Intermetallics},
number = C,
volume = 99,
place = {United States},
year = {Tue May 29 00:00:00 EDT 2018},
month = {Tue May 29 00:00:00 EDT 2018}
}
Web of Science
Figures / Tables:
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Works referencing / citing this record:
A Short Review on Welding and Joining of High Entropy Alloys
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Design, Microstructure and Mechanical Properties of Cast Medium Entropy Aluminium Alloys
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