Multicomponent intermetallic nanoparticles and superb mechanical behaviors of complex alloys
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal
Related Research Unit(s)
|Journal / Publication||Science (New York, N.Y.)|
|Publication status||Published - 23 Nov 2018|
|Link to Scopus||https://www.scopus.com/record/display.uri?eid=2-s2.0-85057140298&origin=recordpage|
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.
Multicomponent intermetallic nanoparticles and superb mechanical behaviors of complex alloys. / Yang, T.; Zhao, Y. L.; Tong, Y.; Jiao, Z. B.; Wei, J.; Cai, J. X.; Han, X. D.; Chen, D.; Hu, A.; Kai, J. J.; Lu, K.; Liu, Y.; Liu, C. T.In: Science (New York, N.Y.), Vol. 362, No. 6417, 23.11.2018, p. 933-937.