Multicomponent intermetallic nanoparticles and superb mechanical behaviors of complex alloys

T. Yang, Y. L. Zhao, Y. Tong, Z. B. Jiao, J. Wei, J. X. Cai, X. D. Han, D. Chen, A. Hu, J. J. Kai, K. Lu, Y. Liu, C. T. Liu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

273 Citations (Scopus)

Abstract

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 MCINPstrengthened 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 highstrength 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.

Original languageEnglish
Pages (from-to)933-937
Number of pages5
JournalScience
Volume362
Issue number6417
DOIs
Publication statusPublished - 23 Nov 2018

ASJC Scopus subject areas

  • General

Cite this