Details

Autor(en) / Beteiligte

• 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

Titel

Multicomponent intermetallic nanoparticles and superb mechanical behaviors of complex alloys

Ist Teil von

• Science (American Association for the Advancement of Science), 2018-11, Vol.362 (6417), p.933-937

Ort / Verlag

United States: The American Association for the Advancement of Science

Erscheinungsjahr

2018

Quelle

Science Online科学在线

Beschreibungen/Notizen

• 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.