Achieving high strength and high ductility in a high-entropy alloy by a combination of a heterogeneous grain structure and oxide-dispersion strengthening

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 805; p. 140544
• Main Authors: Cheng, Zhuo, Yang, Lu, Mao, Wenhao, Huang, Zhikun, Liang, Dingshan, He, Bin, Ren, Fuzeng
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 23.02.2021; Elsevier BV
• Subjects: Alloys; Dispersion hardening alloys; Dispersion strengthening; Ductility; Elongation; Grain refinement; Grain structure; Heterogeneous grain structure; High entropy alloys; High strength; Mechanical properties; Nanoparticles; Oxide-dispersion strengthening; Oxide-dispersion strengthening; High-entropy alloys; Mechanical properties; Heterogeneous grain structure

Strengthening single-phase face-centered cubic high-entropy alloys (HEAs) by grain refinement is usually accompanied by a dramatic loss of ductility, which is referred to as the strength–ductility trade-off dilemma. To overcome this dilemma, we propose a strategy to achieve an excellent combination...