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Multicomponent intermetallic nanoparticles and superb mechanical behaviors of complex alloys

Tao YangCenter for Advanced Structural Materials/Department of Mechanical Engineering, College of Science and Engineering, City University of Hong Kong, Hong Kong, ChinaYilu ZhaoCenter for Advanced Structural Materials/Department of Mechanical Engineering, College of Science and Engineering, City University of Hong Kong, Hong Kong, ChinaYang TongCenter for Advanced Structural Materials/Department of Mechanical Engineering, College of Science and Engineering, City University of Hong Kong, Hong Kong, ChinaZengbao JiaoDepartment of Mechanical Engineering, Hong Kong Polytechnic University, Hong Kong, ChinaJun WeiCenter for Advanced Structural Materials/Department of Mechanical Engineering, College of Science and Engineering, City University of Hong Kong, Hong Kong, ChinaJixiang CaiInstitute of Microstructure and Properties of Advanced Materials, Beijing University of Technology, Beijing 100124, ChinaX. D. HanInstitute of Microstructure and Properties of Advanced Materials, Beijing University of Technology, Beijing 100124, ChinaDa ChenCenter for Advanced Structural Materials/Department of Mechanical Engineering, College of Science and Engineering, City University of Hong Kong, Hong Kong, ChinaAlice HuCenter for Advanced Structural Materials/Department of Mechanical Engineering, College of Science and Engineering, City University of Hong Kong, Hong Kong, ChinaJi‐Jung KaiCenter for Advanced Structural Materials/Department of Mechanical Engineering, College of Science and Engineering, City University of Hong Kong, Hong Kong, ChinaK. LuShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaYanfei LiuThe State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, Hunan, ChinaC.T. LiuCenter for Advanced Structural Materials/Department of Mechanical Engineering, College of Science and Engineering, City University of Hong Kong, Hong Kong, China

2018en

ABI

Annotatsiya

Alloy design based on single-principal-element systems has approached its limit for performance enhancements. A substantial increase in strength up to gigapascal levels typically causes the premature failure of materials with reduced ductility. Here, we report a strategy to break this trade-off by controllably introducing high-density ductile multicomponent intermetallic nanoparticles (MCINPs) in complex alloy systems. Distinct from the intermetallic-induced embrittlement under conventional wisdom, such MCINP-strengthened alloys exhibit superior strengths of 1.5 gigapascals and ductility as high as 50% in tension at ambient temperature. The plastic instability, a major concern for high-strength materials, can be completely eliminated by generating a distinctive multistage work-hardening behavior, resulting from pronounced dislocation activities and deformation-induced microbands. This MCINP strategy offers a paradigm to develop next-generation materials for structural applications.

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Identifikatorlar

DOI: 10.1126/science.aas8815

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