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

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,…

• CU
  City University of Hong Kong

  Award: 11201721
• NN
  National Natural Science Foundation of China

  Awards: 52271132, 52271153, 51971178, 52301211
• AS
  Academia Sinica

  Award: AS-IA-112-M05
• RG
  Research Grants Council, University Grants Committee

  Awards: CityU11200719, CityU11213118, CityU 11201721
• SU
  Southern University of Science and Technology

  Award: JCYJ20220530115011026
• HK
  Hong Kong Government

  Awards: CityU11200719, CityU11213118, CityU 11201721
• NS
  National Science and Technology Council
• BA
  Basic and Applied Basic Research Foundation of Guangdong Province

  Award: 2023A1515011510