A lightweight refractory complex concentrated alloy with high strength and uniform ductility

作者：Jia, Yuefei; Wang, Gang^*; Wu, Shiwei; Mu, Yongkun; Yi, Yun; Jia, Yandong; Liaw, Peter K.; Zhang, Tongyi; Liu, Chain-Tsuan

来源：Applied Materials Today, 2022, 27: 101429.

DOI：10.1016/j.apmt.2022.101429

• Lightweight
• Complex concentrated alloy
• Alloy design
• High strength

Advanced alloys with lightweight, gigapascal strength, and sufficient ductility are vitally crucial for engineering applications. However, the intrinsic conflicts between strength and ductility or strength and density cause a big challenge to improve the comprehensive performance of alloys. In the current study, we adopt a two-step method to overcome this trade-off by tailoring the atomic mixing of lightweight elements and refractory elements to form a lightweight refractory complex concentrated alloy (LRCCA). Then, a lightweight, high-strength, intrinsically ductile complex concentrated matrix (LRCCM) alloy is developed, modified with nano/submicron multicomponent intermetallic compound particles (MICPs). The developed MICPs-LRCCM exhibits a high yield strength, sufficient ductility and a relative low density (-5.9 g/cm(3)), as well as high specific strength of-230 MPamiddotcm3/g. High solution strengthening together with precipitation are simultaneously operated in the MICPs-LRCCM. Our results provide a guidance for designing high-performance lightweight alloys for structural applications.

• 单位
  上海大学