Lattice distortion enabling enhanced strength and plasticity in high entropy intermetallic alloy

Wang，H.1; Yang，P. Y.2; Zhao，W. J.1,3; Ma，S. H.1; Hou，J. H.4; He，Q. F.1,5; Wu，C. L.2; Chen，H. A.6; Wang，Q.7; Cheng，Q.8; Guo，B. S.1,9; Qiao，J. C.10; Lu，W. J.4; Zhao，S. J.1; Xu，X. D.6; Liu，C. T.1,11; Liu，Y.3; Pao，C. W.2; Yang，Y.1,11

2024-12-01

10.1038/s41467-024-51204-0

Nature Communications   影响因子和分区

2041-1723

Intermetallic alloys have traditionally been characterized by their inherent brittleness due to their lack of sufficient slip systems and absence of strain hardening. However, here we developed a single-phase B2 high-entropy intermetallic alloy that is both strong and plastic. Unlike conventional intermetallics, this high-entropy alloy features a highly distorted crystalline lattice with complex chemical order, leading to multiple slip systems and high flow stress. In addition, the alloy exhibits a dynamic hardening mechanism triggered by dislocation gliding that preserves its strength across a wide range of temperatures. As a result, this high-entropy intermetallic circumvents precipitous thermal softening, with extensive plastic flows even at high homologous temperatures, outperforming a variety of both body-centered cubic and B2 alloys. These findings reveal a promising direction for the development of intermetallic alloys with broad engineering applications.

SCI

英语

其他

2-s2.0-85200855620

Scopus

1.Department of Mechanical Engineering,City University of Hong Kong,Tat Chee Avenue,Kowloon Tong,Kowloon,Hong Kong
2.Research Center for Applied Sciences,Academia Sinica,Taipei,Taiwan
3.State Key Laboratory of Powder Metallurgy,Central South University,Changsha,Hunan,China
4.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,China
5.Institute of Materials Modification and Modeling,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai,China
6.Department of Materials and Mineral Resources Engineering,National Taipei University of Technology,Taipei,Taiwan
7.Laboratory for Microstructures,Institute of Materials,Shanghai University,Shanghai,China
8.Centre for High Resolution Electron Microscopy,College of Materials Science and Engineering,Hunan University,Changsha,Hunan,China
9.Institute of Advanced Wear & amp; Corrosion Resistant and Functional Materials,Jinan University,Guangzhou,Guangdong,China
10.School of Mechanics,Civil Engineering and Architecture,Northwestern Polytechnical University,Xi’an,Shanxi,China
11.Department of Materials Science and Engineering,City University of Hong Kong,Tat Chee Avenue,Kowloon Tong,Kowloon,Hong Kong

Wang，H.,Yang，P. Y.,Zhao，W. J.,et al. Lattice distortion enabling enhanced strength and plasticity in high entropy intermetallic alloy[J]. Nature Communications,2024,15(1).

Wang，H..,Yang，P. Y..,Zhao，W. J..,Ma，S. H..,Hou，J. H..,...&Yang，Y..(2024).Lattice distortion enabling enhanced strength and plasticity in high entropy intermetallic alloy.Nature Communications,15(1).

Wang，H.,et al."Lattice distortion enabling enhanced strength and plasticity in high entropy intermetallic alloy".Nature Communications 15.1(2024).