A novel lightweight refractory high-entropy alloy

作者：Wentao Jiang, Tiantian Wang, Xiaohong Wang, Bo Jiang, Ye Wang, Xin Wang, Hongyu Xu, Maoliang Hu, Dongdong Zhu · 发表于：Journal of Materials Research and Technology · 年份：2024 · DOI：10.1016/j.jmrt.2024.11.247 · 被引用次数：9 · 研究领域：High Entropy Alloys Studies、High-Temperature Coating Behaviors、Additive Manufacturing Materials and Processes

A novel equiatomic refractory AlNbTiVY high-entropy alloy containing rare earth elements was fabricated by vacuum arc melting. AlNbTiVY alloy possesses a dual-phase structure, consisting of a B2 ordered matrix and an Orthorhombic structured Y 2 Al second phase. The alloy has a dendritic microstructure with a density of only 5.18 g/cm 3 . As the testing temperature increases, the compressive yield strength of the alloy gradually decreases from 1104 MPa at room temperature to 321 MPa at 800 °C, with improved deformability and no fracture occurring in the 800 °C environment. Based on the insights of physics, a simple calculation was conducted on the temperature-dependent model of the alloy, and the theoretical application temperature of the alloy was predicted to exceed 600 °C.