Mechanical Behavior of High-Entropy Alloys: A Review

Book · Wed Dec 01 00:00:00 EST 2021

DOI:https://doi.org/10.1007/978-3-030-77641-1_10· OSTI ID:1843666

Shang, Yuanyuan ^[1]; Brechtl, Jamieson ^[2]; Pistidda, Claudio ^[1]; Liaw, Peter K. ^[3]

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1. Institute of Hydrogen Technology, Helmholtz-Zentrum
2. ORNL
3. University of Tennessee, Knoxville (UTK)

High-entropy alloys (HEAs) are materials that consist of equimolar or near-equimolar multiple principal components but tend to form single phases, which is a new research topic in the field of metallurgy, and have attracted extensive attention in the past decade. The HEAs families contain the face-centered-cubic (fcc), body-centered-cubic (bcc), and hexagonal-close-packed (hcp)-structured HEAs. On the one hand, mechanical properties, e.g., hardness, strength, ductility, fatigue, and elastic moduli, are essential for practical applications of HEAs. Scientists have explored in this direction since the advent of HEAs. On the other hand, the pursuit of high strength and good plasticity is the critical research issue of materials. Hence, strengthening of HEAs is a crucial issue.In this chapter, we reviewed the recent work on the room-temperature elastic properties and mechanical behavior of HEAs, including the mechanisms behind the plastic deformation of HEAs at both low and high temperatures. Furthermore, the present work examined the strengthening strategies of HEAs, e.g., strain hardening, grain-boundary strengthening, solid-solution strengthening, and particle strengthening. The fatigue, creep, and fracture properties were briefly introduced. Lastly, the future scientific issues and challenges of HEAs were discussed.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1843666
• Country of Publication: United States
• Language: English