Microstructural evolution and mechanical behavior of novel Ti1.6ZrNbAlx lightweight refractory high-entropy alloys containing BCC/B2 phases

作者：Wang, Hao; Chen, Weiping; Chu, Chenliang; Fu, Zhiqiang^*; Jiang, Zhenfei; Yang, Xin; Lavernia, Enrique J.^*

来源：Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing , 2023, 885: 145661.

DOI：10.1016/j.msea.2023.145661

• Refractory high-entropy alloy
• Coherent precipitation
• Lightweight
• Mechanical properties

To demonstrate the concept of lightweight refractory high-entropy alloys (LRHEAs) with remarkable strength and ductility at room- and high-temperatures, we designed and fabricated novel Ti1.6ZrNbAlx (x = 0.3, 0.4, 0.5 and 0.65) LRHEAs with a relatively low density (800 MPa) and satisfactory tensile ductility (>10%) at room-temperature. The compressive peak stress exceeding 500 MPa at 600 C supports the potential application of these LRHEAs as high-temperature structural materials. Our work provides a framework that can be used to guide the design of high-performance LRHEAs for high-temperature applications.